CompTIA A+ Core 1 220-1201 220-1201 Questions 526–600 | Page 8/12

526

MCQhard

A user's smartphone intermittently drops Wi-Fi connection when the device is moved from one room to another. The home uses a single Wi-Fi router. The technician suspects the issue is related to the device's power management. Which setting should be adjusted to maintain a stable connection?

A.Enable 'Wi-Fi calling' to offload calls to cellular.

B.Set the device to 'Keep Wi-Fi on during sleep' to 'Always'.

C.Disable 'Wi-Fi power saving mode' in the advanced Wi-Fi settings.

D.Change the Wi-Fi frequency band from 5 GHz to 2.4 GHz.

AnswerC

Wi-Fi power saving mode, often found in advanced Wi-Fi settings, reduces the power consumption of the device's Wi-Fi radio to conserve battery. This can lead to the radio operating at a lower signal strength or scanning less frequently, making it more susceptible to intermittent disconnections, especially when the signal is marginal or the device is moving. Disabling this feature ensures the Wi-Fi radio operates at full power, maintaining a more robust and stable connection.

Why this answer

Disabling 'Wi-Fi power saving mode' prevents the device from reducing radio power or entering low-power states when moving between rooms, which can cause intermittent signal drops. This setting directly addresses the power management behavior that leads to unstable connections during transitions.

Exam trap

The 220-1201 exam often tests the distinction between power management settings (like Wi-Fi power saving mode) and connectivity settings (like band selection or sleep behavior), trapping candidates who confuse range-related fixes with power-saving adjustments.

How to eliminate wrong answers

Option A is wrong because 'Wi-Fi calling' offloads voice calls to the cellular network when Wi-Fi is weak, but it does not affect the device's power management or prevent Wi-Fi disconnections during movement. Option B is wrong because 'Keep Wi-Fi on during sleep' controls behavior only when the device is in sleep mode, not during active movement between rooms; it does not address power management during active use. Option D is wrong because changing the frequency band from 5 GHz to 2.4 GHz may improve range but does not resolve power management issues that cause intermittent drops; the problem is related to the device's power-saving algorithms, not the band selection.

Full explanation →

527

MCQeasy

A user reports that their virtual machine is running very slowly. The host system has 16 GB of RAM, and the VM is configured with 8 GB. The host is running a Type 2 hypervisor on Windows 10. The technician checks Task Manager and sees that the host is using 14 GB of RAM. What is the most likely cause of the VM's poor performance?

A.The VM's virtual CPU is overclocked

B.The hypervisor is not compatible with Windows 10

C.The host does not have enough free RAM to support the VM's needs

D.The VM's network adapter is set to NAT instead of bridged

AnswerC

When the host system lacks sufficient physical RAM to allocate to a running virtual machine, the hypervisor is forced to swap portions of the VM's memory to the host's hard drive (paging or swapping). This process, known as disk I/O for virtual memory, is significantly slower than accessing physical RAM, leading to severe performance degradation and a "running slowly" symptom for the VM.

Why this answer

The host is running low on available RAM because the VM's allocated memory is not being released efficiently, or other host processes are consuming memory. In a Type 2 hypervisor, the host OS manages memory, and if it is oversubscribed, the VM will experience swapping and slowdowns.

Full explanation →

528

MCQmedium

A small office server uses RAID 5 with three 1 TB hard drives. One drive fails and is replaced with a new 1 TB drive. During the rebuild process, the server becomes very slow and the RAID controller reports an error. What is the most likely cause of the slowdown?

A.The new drive is not the same model as the others.

B.The RAID controller is overheating.

C.The rebuild process is consuming all available disk I/O.

D.The new drive is not properly seated in the bay.

AnswerC

A RAID 5 rebuild is an extremely I/O-intensive operation because the controller must read data blocks from all remaining operational drives, perform complex XOR calculations to reconstruct the missing data and parity, and then write that reconstructed data to the new drive. This simultaneous read-modify-write operation across multiple drives places an immense load on the disk I/O subsystem. This can easily saturate the array's available bandwidth, leading to a noticeable and severe performance degradation for all other server operations.

Why this answer

RAID 5 rebuild requires reading data and parity from all surviving drives to reconstruct the failed drive's contents, then writing that data to the replacement. This reconstruction saturates the disk controller and drive bandwidth, starving normal I/O and causing severe performance degradation. The controller error is likely a timeout or rebuild-related warning, not a hardware fault.

Exam trap

220-1201 often tests the misconception that a rebuild is a background, low-impact operation; candidates may blame hardware (model mismatch, seating) instead of recognizing that rebuild I/O contention is the expected cause of slowdown.

How to eliminate wrong answers

Option A is wrong because mismatched drive models can affect performance or cause compatibility warnings, but they do not inherently cause the rebuild to consume all I/O; the slowdown is a normal consequence of rebuild activity. Option B is wrong because controller overheating would typically produce thermal warnings or shutdowns, not a rebuild-specific slowdown. Option D is wrong because a poorly seated drive would usually be detected as missing or failed, not cause a rebuild that runs but is slow.

Full explanation →

529

MCQeasy

A customer reports that their desktop computer intermittently freezes and emits a high-pitched whine. The issue occurs more frequently under heavy load, such as when rendering video. Which CPU-related feature is most likely causing this symptom?

A.CPU throttling due to overheating

B.Coil whine from the voltage regulator modules

C.A failing CPU fan bearing

D.Incorrect CPU multiplier setting in BIOS

AnswerB

Coil whine is an audible electromagnetic noise produced by vibrating coils (inductors) within power delivery components, such as the Voltage Regulator Modules (VRMs) on a motherboard. This phenomenon occurs when the coils are subjected to rapidly changing electrical currents, causing them to vibrate at frequencies audible to humans. It is particularly common under fluctuating loads, such as during heavy CPU utilization or when transitioning between power states, and while primarily an auditory artifact, severe VRM instability or failure (which can manifest as whine) can indeed contribute to system instability and intermittent freezes.

Why this answer

The high-pitched whine from a computer under heavy load is typically coil whine, caused by electrical vibrations in the voltage regulator modules (VRMs) or inductors as they work harder to deliver power. While coil whine can sometimes be an annoying but harmless artifact, when accompanied by system freezes, it indicates that the VRMs are struggling to provide stable power under heavy load, leading to instability and crashes. This points to an issue with the power delivery system, which is critical for CPU operation.

Full explanation →

530

MCQmedium

During a laptop keyboard replacement, a technician accidentally dislodges a small ribbon cable from the touchpad connector. The touchpad is now unresponsive. The technician has never worked on this model before. What is the best course of action to resolve the issue?

A.Use tweezers to gently push the ribbon cable into any nearby empty connector.

B.Reboot the laptop to see if the touchpad driver reloads.

C.Consult the service manual to identify the correct connector and reseat the cable.

D.Replace the entire keyboard assembly since the touchpad cable is likely broken.

AnswerC

Laptop service manuals are indispensable resources for technicians, providing detailed component layouts, specific connector types, and step-by-step reassembly instructions. Consulting the manual ensures the technician correctly identifies the precise ZIF or LIF connector for the touchpad ribbon cable and understands its proper orientation. Reseating the cable correctly, with the latch secured, restores the necessary electrical continuity, allowing the touchpad to function as intended without risking damage.

Why this answer

The most logical and safe first step when dealing with an unfamiliar laptop model is to consult the service manual. This ensures the technician identifies the exact connector for the touchpad ribbon cable, preventing damage from forcing the cable into the wrong port. Reseating the cable correctly is the standard fix for a dislodged connection.

Exam trap

The trap here is that candidates may assume a reboot (Option B) will fix any unresponsive device, overlooking the fundamental hardware disconnection, or they may panic and try to force the cable into any available slot (Option A) without verifying the correct port.

How to eliminate wrong answers

Option A is wrong because inserting the ribbon cable into any empty connector risks shorting circuits or damaging the cable and motherboard, as connectors are keyed for specific functions and voltages. Option B is wrong because rebooting will not physically reconnect a dislodged cable; the touchpad is unresponsive due to a hardware disconnection, not a driver issue. Option D is wrong because replacing the entire keyboard assembly is an unnecessary and costly step when the cable is likely intact and simply needs to be reseated.

Full explanation →

531

MCQeasy

A customer reports that their laptop connects to the office Wi-Fi but cannot access the internet. Other devices on the same network work fine. What is the most likely cause of this issue?

A.The laptop's DNS server address is set to a public DNS like 8.8.8.8

B.The laptop's default gateway address is incorrect

C.The laptop's IP address is set to a static address in the same subnet as the router

D.The office Wi-Fi network is using a different SSID than expected

AnswerB

The default gateway is the IP address of the router or device that allows a client to send traffic outside its local subnet, typically to the internet. If the laptop's default gateway address is configured incorrectly, it will be unable to forward any packets destined for external networks. This means the laptop can communicate with other devices on its local network segment but cannot reach the internet or any resources beyond its immediate subnet, precisely matching the described symptom of connecting to Wi-Fi but lacking internet access.

Why this answer

The laptop can connect to the Wi-Fi network but cannot access the internet, while other devices work fine. This points to a client-side configuration issue. The default gateway is the router that forwards traffic from the local subnet to external networks; if the laptop's default gateway address is incorrect, its packets cannot leave the local subnet, breaking internet access while local connectivity remains.

Exam trap

CompTIA A+ often tests the misconception that DNS is the root cause of internet access failure, but the trap here is that DNS only affects name resolution, not the ability to route packets to the internet; candidates must distinguish between connectivity to the local network and connectivity beyond the gateway.

How to eliminate wrong answers

Option A is wrong because using a public DNS like 8.8.8.8 would still allow internet access if the gateway is correct; DNS only affects name resolution, not basic IP connectivity. Option C is wrong because a static IP in the same subnet as the router would still allow internet access as long as the gateway and DNS are correctly configured; being in the same subnet does not inherently break internet access. Option D is wrong because if the laptop connects to the office Wi-Fi, it is already associated with the correct SSID; a different SSID would prevent connection entirely, not allow connection but block internet.

Full explanation →

532

MCQeasy

A small office uses a network printer that is shared via a print server. Users report that print jobs are not reaching the printer. The technician pings the print server successfully but cannot connect to the printer's web interface using its IP address. Which protocol is most likely blocked or malfunctioning?

A.HTTP

B.TCP

C.UDP

D.SNMP

AnswerA

HTTP (Hypertext Transfer Protocol) is the application-layer protocol specifically designed for transmitting hypermedia documents, such as HTML, which forms the basis of a web interface. To access a network printer's web-based management interface, a web browser sends requests using HTTP (or HTTPS for secure connections) to the printer's embedded web server. If the printer's HTTP service is not running, or if a firewall blocks the standard HTTP port (80) or HTTPS port (443), the web interface will be unreachable, even if the printer is otherwise online and responding to pings.

Why this answer

The technician can ping the print server (ICMP success) but cannot connect to the printer's web interface via its IP address. The web interface uses HTTP (port 80) or HTTPS (port 443). Since ICMP is working but HTTP is not, the most likely issue is that HTTP traffic is being blocked by a firewall or the HTTP service on the printer is malfunctioning.

This directly points to HTTP as the blocked or malfunctioning protocol.

Exam trap

CompTIA often tests the distinction between ICMP (ping) success and application-layer protocol failure, trapping candidates who assume that a successful ping guarantees full network connectivity to all services.

How to eliminate wrong answers

Option B (TCP) is wrong because TCP is a transport-layer protocol, not an application-layer service; blocking TCP entirely would break all TCP-based communication, including the successful ping (which uses ICMP, not TCP) and any other network functions. Option C (UDP) is wrong because the printer's web interface uses HTTP over TCP, not UDP; blocking UDP would not affect HTTP connectivity. Option D (SNMP) is wrong because SNMP is used for network management and monitoring, not for accessing a printer's web interface; blocking SNMP would not prevent HTTP access.

Full explanation →

533

MCQmedium

A customer complains that their LCD monitor shows a persistent dark shadow in the upper-left corner that does not change with different input sources. The monitor is three years old. What is the most likely cause?

A.The monitor's resolution is set incorrectly.

B.The video cable is loose or damaged.

C.The monitor's backlight has failed partially.

D.The graphics card is overheating and throttling.

AnswerC

LCD monitors rely on a uniform backlight to illuminate the liquid crystal display, which forms the image. If a portion of the backlight array (e.g., a section of LED strips or a CCFL tube) fails, that specific area of the screen will appear significantly darker, creating a fixed shadow. This is a common hardware failure that affects the display regardless of the input source, confirming an internal monitor issue.

Why this answer

A dark shadow that stays in the same spot regardless of input indicates a hardware defect, typically backlight failure or a damaged LCD panel. Backlight LEDs can fail over time, creating uneven illumination. Replacing the monitor is the standard fix because panel repair is often cost-prohibitive.

Full explanation →

534

MCQmedium

A user reports that their color laser printer is producing prints with a repeating vertical black line down the left side of every page. The line appears at regular intervals. Which component is most likely causing this defect?

A.Toner cartridge

B.Transfer belt

C.Imaging drum

D.Fuser roller

AnswerC

The imaging drum (photoreceptor drum) is the central component where the latent electrostatic image is formed by the laser and subsequently attracts toner particles. A physical defect on its surface, such as a scratch, dent, or even a piece of debris adhering to it, will disrupt the electrostatic charge or toner adhesion at that specific point. As the drum rotates, this defect will consistently pick up or fail to pick up toner, creating a distinct, repeating mark, such as a black line, on the page, with the repetition interval directly corresponding to the drum's circumference.

Why this answer

Repeating marks on laser printer output often indicate a damaged component that rotates, such as the imaging drum or fuser roller. The distance between repeats helps identify the source. A vertical line at regular intervals is characteristic of a scratch or debris on the drum.

Full explanation →

535

MCQeasy

A client wants to upgrade their desktop PC with a new, faster processor. They have purchased a CPU that is listed as compatible with the motherboard's socket type. After installation, the system powers on but displays a blank screen. What is the most likely issue?

A.The CPU is not seated properly

B.The motherboard BIOS needs an update

C.The RAM is incompatible with the new CPU

D.The power supply is insufficient

AnswerB

When a new CPU is installed, even if it physically fits the motherboard socket, the system's BIOS/UEFI firmware must contain the microcode and instructions necessary to recognize and properly initialize that specific processor model. If the existing BIOS version predates the CPU's release, it will lack this essential support, causing the system to power on, spin up fans, but fail to complete the Power-On Self-Test (POST) and display any output. Updating the BIOS to a compatible version is frequently the solution for this exact symptom after a CPU upgrade.

Why this answer

The most likely issue is that the motherboard BIOS needs an update to support the new CPU. Even if the socket type is compatible, older BIOS versions may not recognize newer CPU models, causing the system to power on but fail to POST.

Exam trap

220-1201 often tests the misconception that socket compatibility alone guarantees CPU support, ignoring BIOS version requirements.

How to eliminate wrong answers

Option A is wrong because if the CPU were not seated properly, the system typically would not power on at all or would give a specific error, but it's less likely than a BIOS incompatibility. Option C is wrong because RAM incompatibility usually causes beep codes or specific errors, not a blank screen with power on. Option D is wrong because an insufficient power supply would cause random shutdowns or failure to power on, not a consistent blank screen.

Full explanation →

536

MCQmedium

A technician is setting up a kiosk mode on an Android tablet for a retail display. The tablet will run a single app that customers use to browse products. After enabling kiosk mode via a third-party app, the tablet reboots and the kiosk app does not start automatically. What should the technician verify?

A.The tablet is connected to Wi-Fi for app updates.

B.The kiosk app is set as the default home screen app.

C.The tablet's battery is fully charged.

D.The kiosk app is installed on the SD card.

AnswerB

Setting the kiosk application as the default home screen app, also known as the default launcher, is the fundamental configuration required to achieve true kiosk mode functionality. This ensures that when the tablet boots up, the operating system bypasses the standard user interface and immediately loads the specified application. This action prevents access to other device functions and maintains the dedicated purpose of the kiosk, making it the primary interface the user interacts with from startup.

Why this answer

When kiosk mode is enabled on Android, the device must designate the kiosk app as the default home screen app. This ensures that after a reboot, the Android launcher automatically starts the designated app instead of the system launcher. Without this setting, the tablet will boot to the default home screen, not the kiosk app.

Exam trap

The 220-1201 exam often tests the misconception that simply enabling kiosk mode via a third-party app is enough, without understanding that Android requires the app to be set as the default home screen to survive a reboot.

How to eliminate wrong answers

Option A is wrong because Wi-Fi connectivity is not required for the kiosk app to start automatically after a reboot; app updates are unrelated to the boot-time launch behavior. Option C is wrong because battery charge level does not affect whether the kiosk app launches on boot; a low battery might prevent boot entirely but not cause the app to fail to start. Option D is wrong because installing the app on an SD card does not prevent it from launching automatically; Android can launch apps from external storage, though performance may vary, but this is not the cause of the failure.

Full explanation →

537

MCQmedium

A technician is troubleshooting a satellite internet connection that has high latency and frequent disconnections. The dish is installed on a roof with a clear view of the sky. What is the most likely cause of the high latency?

A.The satellite dish is not grounded properly.

B.The modem is outdated.

C.The signal has to travel a long distance to the satellite and back.

D.There is interference from nearby cellular towers.

AnswerC

Geostationary satellites orbit approximately 22,236 miles (35,786 km) above the Earth's equator. A signal must travel from the user's dish to the satellite, then down to a ground station (Network Operations Center), and then back along the same path. This results in a total round-trip distance of nearly 90,000 miles, which, even at the speed of light, introduces a significant and unavoidable propagation delay, manifesting as high latency.

Why this answer

Satellite internet inherently suffers from high latency because the signal must travel to a geostationary satellite approximately 35,786 km above the equator and back. This round-trip distance of roughly 70,000 km, even at the speed of light, results in a minimum latency of about 240 ms, which is far higher than terrestrial connections. Frequent disconnections can also occur due to atmospheric conditions, but the high latency is a direct consequence of the physical distance the signal must traverse.

Exam trap

CompTIA often tests the candidate's understanding that latency in satellite internet is a physical limitation of distance, not a configuration or interference issue, and the trap here is that candidates may confuse symptoms like disconnections (which can have many causes) with the root cause of high latency.

How to eliminate wrong answers

Option A is wrong because improper grounding of the satellite dish can cause electrical safety hazards or damage from lightning strikes, but it does not directly cause high latency or frequent disconnections related to signal travel time. Option B is wrong because an outdated modem might limit throughput or lack support for newer standards, but it does not change the fundamental physics of signal propagation delay to and from the satellite. Option D is wrong because interference from nearby cellular towers typically causes signal degradation, packet loss, or reduced signal-to-noise ratio, not the consistently high latency that is characteristic of satellite links.

Full explanation →

538

MCQmedium

A user complains that their laptop's built-in webcam is not working in video conferencing apps. The device manager shows the camera as 'disabled'. The technician enables it, but the camera still shows a black screen in apps. What should the technician do next?

A.Uninstall and reinstall the camera driver

B.Check for a physical privacy shutter on the webcam and verify Windows camera privacy settings

C.Replace the webcam module

D.Update the laptop's BIOS

AnswerB

Many modern laptops include a physical privacy shutter that can slide over the webcam lens, effectively blocking the camera's view and causing a black screen. Additionally, Windows operating systems feature robust privacy settings that allow users to restrict camera access globally or for specific applications. Verifying both of these common, user-configurable settings is the most logical and efficient initial troubleshooting step for a non-functional built-in webcam.

Why this answer

Once Device Manager shows the camera as enabled but apps still render a black screen, the most common causes are a physical privacy shutter covering the lens or Windows camera privacy settings (Settings > Privacy > Camera) blocking app access. Both are non-destructive checks that should be performed before any driver or hardware work.

Exam trap

220-1201 often tests whether candidates jump straight to driver reinstallation when the real issue is a privacy toggle or physical shutter — the exam rewards the least invasive diagnostic step first.

How to eliminate wrong answers

Option A is wrong because reinstalling the driver is premature — the device is already enumerated and enabled in Device Manager, so the driver is loading; the issue is access, not driver integrity. Option C is wrong because replacing the webcam module is a last-resort hardware step that ignores the far more likely software/privacy cause and would waste a part. Option D is wrong because a BIOS update does not affect per-app camera privacy toggles or physical shutters and is an unnecessarily risky step for a symptom this specific.

Full explanation →

539

MCQmedium

A company uses a Type 1 hypervisor for production servers. A technician needs to migrate a running VM from one host to another without any downtime. Which feature should be used?

A.Snapshot the VM and restore on the new host

B.Use virtual machine cloning

C.Perform a live migration using the hypervisor's built-in feature

D.Export the VM as an OVF and import on the new host

AnswerC

Live migration is a sophisticated feature built into type 1 hypervisors that allows a running virtual machine to be moved from one physical host to another without any interruption to the services it provides. The process involves iteratively copying the VM's active memory and CPU state to the destination host while the VM continues to execute on the source, with a final cutover taking only milliseconds. This ensures zero downtime and continuous availability, making it the ideal solution for relocating production VMs.

Why this answer

Live migration is the hypervisor feature that moves a running VM between hosts with no downtime by transferring memory state and CPU context while the VM continues running. Type 1 hypervisors like VMware ESXi (vMotion), Hyper-V (Live Migration), and KVM (live migration) support this natively. Snapshots, cloning, and OVF export/import all require downtime or produce copies, not live moves.

Exam trap

220-1201 often tests whether candidates confuse live migration (no downtime, running state preserved) with cold migration methods like snapshots, cloning, or OVF export/import that require downtime.

How to eliminate wrong answers

Option A is wrong because snapshotting and restoring on a new host requires powering off the VM and does not preserve the running state — it causes downtime. Option B is wrong because cloning creates a duplicate VM and does not move the running instance; the original remains and the clone starts fresh, causing downtime. Option D is wrong because exporting to OVF and importing requires shutting down the VM, and OVF is a cold migration format, not a live migration mechanism.

Full explanation →

540

MCQhard

A company uses a cloud-based VoIP service, and users report intermittent call drops and poor audio quality. Network monitoring shows high jitter and packet loss. Which service is most likely contributing to the problem?

A.The DHCP server is leasing IP addresses with a short lease time.

B.The DNS server is responding slowly to queries.

C.The SIP server is overloaded with registration requests.

D.The network is not prioritizing VoIP traffic via QoS.

AnswerD

Without Quality of Service (QoS) mechanisms implemented on the network, real-time VoIP traffic is treated identically to all other data traffic, such as file transfers or web browsing. This lack of prioritization means that during periods of network congestion, VoIP packets can be delayed, reordered, or dropped as they compete for limited bandwidth. This directly leads to audible symptoms like jitter and packet loss, severely degrading call quality during active conversations.

Why this answer

High jitter and packet loss directly degrade real-time VoIP traffic, causing call drops and poor audio. QoS (Quality of Service) mechanisms like DiffServ or 802.1p prioritize voice packets over other traffic, ensuring low latency and consistent delivery. Without QoS, the network treats VoIP packets the same as bulk data, leading to the reported symptoms.

Exam trap

Note the distinction between application-layer issues (SIP overload, DNS) and transport/network-layer issues (jitter, loss). Candidates often mistakenly attribute packet-level symptoms to server overload rather than missing QoS.

How to eliminate wrong answers

Option A is wrong because DHCP lease time affects IP address renewal, not jitter or packet loss; a short lease might cause brief connectivity interruptions but not sustained high jitter. Option B is wrong because slow DNS responses impact call setup (name resolution) but do not cause in-call jitter or packet loss. Option C is wrong because an overloaded SIP server would cause registration failures or call setup delays, not the continuous packet-level issues of jitter and loss during active calls.

Full explanation →

541

MCQhard

A technician is troubleshooting intermittent packet loss on a critical link between two buildings. The link uses single-mode fiber optic cable. Which tool is specifically designed to measure the length of the fiber and locate breaks or splices that could cause signal loss?

A.Light meter

B.OTDR

C.Multimeter

D.Cable tester

AnswerB

An Optical Time-Domain Reflectometer (OTDR) is the correct tool for diagnosing intermittent packet loss on a fiber optic link because it injects pulses of light into the fiber and measures the reflections and backscatter over time. This allows it to create a graphical trace that precisely identifies the distance to and magnitude of events such as splices, connectors, sharp bends, and breaks, providing comprehensive insight into the fiber's physical integrity and pinpointing the source of signal degradation.

Why this answer

An Optical Time-Domain Reflectometer (OTDR) is the correct tool because it sends a series of light pulses into the fiber and measures the backscattered and reflected light to calculate fiber length, locate breaks, splices, and connectors, and quantify loss at each event. This makes it ideal for troubleshooting intermittent packet loss caused by physical impairments in a single-mode fiber link between buildings.

Exam trap

Candidates often mistakenly choose a light meter when the question asks for locating breaks or splices, confusing total loss measurement with event location.

How to eliminate wrong answers

Option A is wrong because a light meter (optical power meter) measures the absolute optical power level at a point, not the length of the fiber or the location of breaks/splices. Option C is wrong because a multimeter measures electrical properties like voltage, current, and resistance, and cannot be used on fiber optic cables which transmit light, not electricity. Option D is wrong because a standard cable tester (e.g., for copper Ethernet) checks wire mapping, continuity, and basic electrical faults, but does not measure fiber length or locate events along a fiber optic cable.

Full explanation →

542

MCQhard

A technician is tasked with connecting a legacy printer that uses a parallel port to a modern laptop that only has USB ports. Which adapter is required to make this connection work?

A.USB to serial adapter

B.USB to parallel adapter

C.USB to PS/2 adapter

D.USB to VGA adapter

AnswerB

A USB to parallel adapter is the correct solution because it bridges the modern Universal Serial Bus (USB) interface with the legacy parallel port standard, often IEEE 1284. This adapter translates the USB data stream into the specific voltage levels and timing signals required by the parallel printer, effectively allowing a contemporary computer without a built-in parallel port to communicate with and print to an older parallel printer.

Why this answer

A USB to parallel adapter allows a modern laptop to communicate with a legacy parallel printer. This requires an active adapter that converts USB signals to parallel. This tests knowledge of legacy connector adaptation and the need for active conversion.

Full explanation →

543

MCQmedium

A user reports that their computer randomly freezes and displays a blue screen error with the message 'MEMORY_MANAGEMENT'. They recently installed a new 8 GB DDR4 module alongside the existing 8 GB module. Both modules are from different manufacturers and have different CAS latencies. What is the most likely cause of the issue?

A.The new RAM module is defective.

B.The RAM is not seated properly in the slot.

C.The RAM modules have mismatched CAS latencies, causing timing conflicts.

D.The motherboard does not support 16 GB of RAM.

AnswerC

This is the most probable cause. When RAM modules with different CAS (Column Access Strobe) latencies are installed together, the memory controller attempts to operate all modules at the slowest common timing to maintain stability. However, if the modules are not designed to function reliably at these forced, potentially suboptimal, combined timings, it can lead to intermittent data corruption and system instability, manifesting as random freezes or blue screens. This subtle incompatibility often surfaces under varying system loads.

Why this answer

Mixing RAM modules with different specifications, especially CAS latency, can cause timing mismatches that lead to system instability and blue screen errors like MEMORY_MANAGEMENT. The system tries to run both sticks at the same timings, which can fail if the modules are not compatible.

Full explanation →

544

MCQmedium

A technician is troubleshooting a laser printer that frequently jams paper. The jams occur mostly when printing on both sides (duplex). What is the most likely cause?

A.The paper is too thick for the printer

B.The fuser is overheating

C.The duplex rollers are worn

D.The toner cartridge is low

AnswerC

Worn duplex rollers are a common cause of paper jams that occur exclusively during double-sided printing. In duplex mode, the printer partially ejects the printed side, then reverses the paper's direction and feeds it back through a specific set of rollers to print on the second side. If these dedicated duplex rollers are worn, they lose their necessary friction and grip, failing to properly grab, guide, or flip the paper during this critical re-entry sequence, leading to frequent and specific jams only when attempting duplex operation.

Why this answer

Duplex printing requires the paper to be flipped and fed back through the printer, which involves additional rollers and a duplex unit. Worn or dirty duplex rollers are a common cause of jams during duplex operations. Cleaning or replacing these rollers often fixes the issue.

Full explanation →

545

MCQmedium

A technician is deploying a new VoIP phone and needs to ensure the Ethernet cable connecting the phone to the wall jack provides sufficient power for the phone to operate. The network switch supports Power over Ethernet (PoE). Which tool can verify that PoE is active on the cable?

A.Multimeter

B.PoE tester

C.Cable tester

D.Loopback plug

AnswerB

A PoE tester is the most suitable and efficient tool for this task because it is specifically designed to detect and often identify the type of Power over Ethernet being supplied over an Ethernet cable. It safely connects inline or directly to the RJ-45 jack, providing clear indications of power presence, voltage levels, and sometimes even the PoE standard (e.g., 802.3af, 802.3at) and power mode (Mode A or Mode B). This ensures the VoIP phone receives adequate and compatible power for operation.

Why this answer

A PoE tester is specifically designed to detect the presence and voltage of Power over Ethernet on a cable, confirming that the switch is delivering power. Unlike a standard cable tester, it checks for the DC voltage (typically 48V) that powers the VoIP phone, ensuring the phone will operate without needing a separate power adapter.

Exam trap

The trap here is that candidates often confuse a cable tester (which checks wiring) with a PoE tester (which checks power), leading them to select Option C because they think any 'tester' for cables will verify PoE, but only a dedicated PoE tester can confirm active power delivery.

How to eliminate wrong answers

Option A is wrong because a multimeter can measure voltage but requires physical probing of individual pins and knowledge of the correct pin pairs (e.g., 4-5 and 7-8 for Mode A, or 1-2 and 3-6 for Mode B), making it impractical for quick field verification and it cannot confirm the power signature or negotiation (e.g., 802.3af/at/bt). Option C is wrong because a cable tester only checks for continuity, wiring faults, and length; it does not detect the presence of DC power or PoE negotiation signals. Option D is wrong because a loopback plug is used to test network interface functionality by reflecting transmitted signals back to the sender, and it has no capability to detect or verify PoE power delivery.

Full explanation →

546

MCQhard

A technician is troubleshooting a workstation that randomly reboots under heavy load, such as when running a benchmark or rendering video. The system passes a memory test with no errors, and the CPU temperatures are normal. The power supply is a 500W unit that is three years old. What is the most likely cause of the reboots?

A.The RAM is overheating under load.

B.The motherboard capacitors are failing.

C.The power supply is unable to deliver consistent power under peak load.

D.The CPU is throttling due to a failing fan.

AnswerC

An aging or insufficient power supply unit (PSU) struggles to provide stable voltage and amperage to components when the system demands peak power, such as during gaming or intensive tasks. This inability results in voltage sags or drops, which can trigger the motherboard's protection mechanisms, causing an immediate and unexpected system reboot to prevent damage. This symptom perfectly aligns with random reboots occurring specifically under load.

Why this answer

The power supply is three years old and the reboots occur only under heavy load, which increases power draw. A failing PSU may not deliver stable voltage under peak demand, causing the system to reset. Memory and CPU temperatures are ruled out by the memory test and normal temps.

Exam trap

The trap here is assuming that random reboots under load are always caused by overheating, leading candidates to overlook the power supply as the culprit when temperatures are normal.

How to eliminate wrong answers

Option A is wrong because RAM overheating would typically cause memory errors or system instability even under moderate load, and the memory test passed. Option B is wrong because failing capacitors often cause intermittent issues but are less likely to manifest only under heavy load; also, no other symptoms like bulging capacitors are mentioned. Option D is wrong because CPU throttling would cause performance degradation, not random reboots, and the CPU temperatures are normal, indicating the fan is working.

Full explanation →

547

MCQmedium

A technician is troubleshooting a wireless network where users experience intermittent drops during peak hours. The access point is an 802.11n model operating on 2.4 GHz. The technician suspects channel congestion. Which tool should the technician use to identify the least congested channel?

A.Wi-Fi analyzer

B.Spectrum analyzer

C.Cable tester

D.Ping command

AnswerA

A Wi-Fi analyzer is an essential tool for wireless network troubleshooting, as it actively scans the 2.4 GHz and 5 GHz frequency bands to identify all active Wi-Fi networks within range. It provides critical data such as SSID, signal strength (RSSI), and, most importantly for channel optimization, the specific channel each network is operating on. By visualizing channel utilization and overlap, a technician can effectively identify less congested channels, thereby optimizing network performance and reducing co-channel interference for users. This direct insight into the RF environment makes it the correct choice for selecting the channel with the least interference.

Why this answer

A Wi-Fi analyzer is the correct tool because it scans the 2.4 GHz band and displays channel utilization, signal strength, and overlapping channels. This allows the technician to identify which channel has the least interference and congestion, directly addressing the intermittent drops during peak hours.

Exam trap

The trap here is that candidates confuse a spectrum analyzer (which detects RF interference) with a Wi-Fi analyzer (which analyzes 802.11 channel usage), leading them to choose B even though the question specifically asks for identifying the least congested channel, not general interference.

How to eliminate wrong answers

Option B is wrong because a spectrum analyzer detects non-802.11 interference (e.g., microwave ovens, Bluetooth) but does not show per-channel utilization or identify the least congested Wi-Fi channel. Option C is wrong because a cable tester verifies physical cabling (e.g., continuity, shorts) and is irrelevant to wireless channel congestion. Option D is wrong because the ping command tests connectivity and latency but provides no information about channel usage or congestion on the 2.4 GHz band.

Full explanation →

548

MCQeasy

A customer reports that their laptop screen flickers intermittently, especially when they adjust the lid angle. The image is clear when the screen is at a specific angle but flickers or goes black at others. What is the most likely cause?

A.The LCD panel has a dead pixel

B.The display cable is loose or damaged

C.The video card driver is outdated

D.The inverter is failing

AnswerB

The display cable, typically an eDP or LVDS cable, routes through the laptop's hinge mechanism, connecting the LCD panel to the motherboard. Repeated stress from opening and closing the lid can cause this cable to become loose, frayed, or damaged over time. This intermittent contact or signal disruption manifests as flickering, color distortion, or even a temporary loss of display, particularly when the lid's position changes, directly indicating a physical connection issue.

Why this answer

The intermittent flickering that correlates with lid angle changes is a classic symptom of a loose or damaged display cable (e.g., LVDS or eDP ribbon cable). As the lid moves, the cable flexes, causing intermittent contact and signal loss, which results in flickering or a black screen at certain angles.

Exam trap

The CompTIA A+ exam often tests the distinction between physical connection issues (like a loose cable) and component failures (like a dead pixel or inverter), tempting candidates to choose a more dramatic-sounding failure when the symptom clearly points to a mechanical cause.

How to eliminate wrong answers

Option A is wrong because a dead pixel appears as a static, non-changing dot on the screen, not as intermittent flickering that varies with lid angle. Option C is wrong because an outdated video card driver would cause persistent graphical artifacts, crashes, or performance issues across all angles, not a flicker that is triggered by physical movement. Option D is wrong because an inverter failure (relevant to CCFL backlights) would cause the entire backlight to fail uniformly, not a flicker that correlates with lid position; modern LED-backlit laptops do not use inverters.

Full explanation →

549

MCQmedium

A technician is setting up a network printer that supports both LPD (Line Printer Daemon) and IPP (Internet Printing Protocol). The printer must be accessible from Windows and Linux clients. Which port should be opened for IPP?

A.515

B.631

C.9100

D.80

AnswerB

IPP communicates over TCP port 631, so opening it lets both Windows and Linux clients submit print jobs to the device. LPD uses port 515, but the stem specifically asks for the IPP port, making 631 the required choice.

Why this answer

IPP (Internet Printing Protocol) uses TCP port 631 by default, as defined in RFC 2911. Since the printer must be accessible from both Windows and Linux clients, opening port 631 allows IPP-based printing, which is natively supported by both operating systems.

Exam trap

CompTIA A+ often tests the distinction between LPD (port 515), IPP (port 631), and raw printing (port 9100), so candidates must remember that IPP is specifically associated with port 631, not the more common HTTP port 80.

How to eliminate wrong answers

Option A is wrong because port 515 is used by LPD (Line Printer Daemon), not IPP. Option C is wrong because port 9100 is used by raw printing protocols (e.g., HP JetDirect), not IPP. Option D is wrong because port 80 is used by HTTP, not IPP; although IPP can be tunneled over HTTP, the standard IPP port is 631.

Full explanation →

550

MCQmedium

A customer reports that their new printer, configured with a static IP of 192.168.1.100, cannot be accessed from any computer on the network. The technician pings 192.168.1.100 from a workstation and gets no reply. The workstation's IP is 192.168.1.50 with a subnet mask of 255.255.255.0. What is the most likely cause?

A.The printer's IP address is on a different subnet than the workstation.

B.The printer's static IP address conflicts with another device on the network.

C.The workstation's subnet mask is set to 255.255.0.0.

D.The printer's default gateway is misconfigured.

AnswerB

This is the correct answer. An IP address conflict occurs when two or more devices on the same network are assigned the identical IP address. When this happens, network communication becomes unreliable or impossible for one or both devices, as packets intended for one device may be routed to the other, or neither device can properly establish a connection. This is a common issue with statically assigned IPs if not carefully managed.

Why this answer

The most likely cause is that the printer's static IP address (192.168.1.100) conflicts with another device on the same subnet. When two devices share the same IP, the network becomes unreachable for one or both due to ARP table instability. The ping fails because the workstation's ARP cache may resolve the IP to the wrong MAC address, or the printer may not respond at all if it detects the conflict via gratuitous ARP.

Exam trap

The 220-1201 exam often tests the misconception that a ping failure between two devices on the same subnet must be caused by a subnet mismatch or gateway issue, when in fact an IP address conflict is the more likely culprit given the static IP configuration.

How to eliminate wrong answers

Option A is wrong because both the printer (192.168.1.100) and the workstation (192.168.1.50) have IP addresses in the 192.168.1.0/24 subnet (subnet mask 255.255.255.0), so they are on the same subnet. Option C is wrong because the workstation's subnet mask is given as 255.255.255.0, not 255.255.0.0; even if it were 255.255.0.0, that would expand the subnet range and still include the printer's IP, so it would not cause a ping failure. Option D is wrong because the default gateway is only needed for traffic destined outside the local subnet; since the workstation and printer are on the same subnet, communication occurs directly via ARP and does not involve the gateway.

Full explanation →

551

MCQhard

A customer reports that their new Cat6a installation passes a cable certifier test but the link only negotiates at 100 Mbps. The cable run is 90 meters and uses standard T568B terminations. What is the most likely cause of the speed limitation?

A.The cable run exceeds the maximum length for Cat6a.

B.The switch port is configured for 100 Mbps only.

C.The patch cables are Cat5e instead of Cat6a.

D.The cable is terminated in T568A instead of T568B.

AnswerC

Network performance is fundamentally dictated by the weakest link in the entire transmission chain. Even if the permanent Cat6a cabling infrastructure is certified for 10 Gigabit Ethernet, connecting devices with lower-grade Cat5e patch cables will create a significant bottleneck. Cat5e is typically rated for 1 Gigabit Ethernet (1000BASE-T) over its full length, and often only 100 Mbps (100BASE-TX) in certain scenarios or with degraded performance. This mismatch would limit the entire link's speed to the capabilities of the Cat5e patch cable, preventing the 10 Gbps potential of the Cat6a permanent link from being realized.

Why this answer

The cable certifier passes because the physical layer (Cat6a cabling) meets specifications for signal integrity and crosstalk. However, if the patch cables connecting the equipment to the structured cabling are Cat5e, they may not support the higher frequencies required for 1000BASE-T (up to 100 MHz for Cat5e vs. 500 MHz for Cat6a). This can cause the link to fall back to 100BASE-TX, which operates at lower frequencies and is more tolerant of the reduced performance of Cat5e patch cables.

Exam trap

The trap here is that candidates assume a passing certifier result guarantees full link speed, but the certifier tests the permanent link only, not the patch cables, so the issue is likely in the patch cords.

How to eliminate wrong answers

Option A is wrong because Cat6a supports a maximum channel length of 100 meters (90 meters permanent link plus 10 meters patch cables), so a 90-meter run is within specification. Option B is wrong because the question states the link negotiates at 100 Mbps, which could be due to a switch port configuration, but the most likely cause given the certifier passes and the cable is new is a component limitation, not a configuration issue. Option D is wrong because T568A and T568B are both valid wiring schemes that are electrically identical; the difference is only in the pair-to-pin assignment, and both support Gigabit Ethernet as long as the same standard is used at both ends.

Full explanation →

552

MCQhard

A network administrator notices that a critical database server is responding slowly. The server uses both TCP and UDP for different services. Which of the following is a characteristic of UDP that could explain performance issues under heavy load?

A.UDP retransmits lost packets automatically

B.UDP uses a three-way handshake to establish a connection

C.UDP does not guarantee packet delivery or order

D.UDP provides flow control to prevent congestion

AnswerC

The User Datagram Protocol (UDP) is inherently an unreliable transport protocol, meaning it offers no guarantees regarding the successful delivery of packets to their destination. Packets sent via UDP may arrive out of sequence, be duplicated, or be lost entirely without any notification to the sender. This lack of reliability and ordering ensures minimal overhead, making it suitable for applications where speed is prioritized over absolute data integrity or where minor data loss is acceptable.

Why this answer

UDP is a connectionless transport protocol that does not guarantee packet delivery, ordering, or error recovery. Under heavy load, if the database server receives UDP datagrams out of order or loses packets, the application layer must handle retransmissions and reassembly, which can degrade performance. This lack of reliability and flow control means UDP can overwhelm a server with traffic it cannot manage, leading to slow responses.

Exam trap

A common misconception is that UDP is always faster or more reliable under load, when in fact its lack of flow control and retransmission can cause performance degradation in high-traffic environments.

How to eliminate wrong answers

Option A is wrong because UDP does not retransmit lost packets; retransmission is a feature of TCP, which uses sequence numbers and acknowledgments to ensure delivery. Option B is wrong because UDP does not use a three-way handshake; that connection-establishment process is unique to TCP. Option D is wrong because UDP does not provide flow control; TCP implements flow control via sliding windows and congestion avoidance algorithms like Reno or Cubic.

Full explanation →

553

MCQmedium

A technician is troubleshooting a home network where the 5 GHz band works fine, but the 2.4 GHz band is extremely slow and drops connections. The router is placed near a cordless phone base station. Which type of interference is most likely occurring?

A.Bluetooth interference

B.Microwave oven interference

C.Co-channel interference from a neighboring Wi-Fi network

D.RF interference from the cordless phone base

AnswerD

Many older cordless phone systems operate continuously in the 2.4 GHz ISM band, directly overlapping with Wi-Fi channels 1-11. These base stations emit a relatively strong and constant radio frequency (RF) signal, which can severely degrade the signal-to-noise ratio for Wi-Fi devices operating on the same band. This persistent, localized interference perfectly explains poor performance on the 2.4 GHz band while the 5 GHz band remains unaffected.

Why this answer

The 2.4 GHz band is shared by many consumer devices, including cordless phones that operate in the 2.4 GHz ISM band. The proximity of the router to the cordless phone base station causes RF interference, which degrades the 2.4 GHz signal, leading to slow speeds and dropped connections, while the 5 GHz band remains unaffected because it operates on a different frequency range.

Exam trap

This question tests the candidate's ability to distinguish between common 2.4 GHz interference sources. The trap is to assume that any 2.4 GHz device (like Bluetooth or a microwave) causes similar interference, but the specific symptoms of persistent, severe degradation due to a nearby cordless phone base station point to intentional RF interference from a device that operates continuously on the same frequency band.

How to eliminate wrong answers

Option A is wrong because Bluetooth also operates in the 2.4 GHz band but uses frequency-hopping spread spectrum (FHSS) with low duty cycles, making it unlikely to cause persistent, severe degradation; the primary culprit here is the cordless phone base. Option B is wrong because microwave ovens operate at approximately 2.45 GHz and can cause interference, but the question explicitly states the router is placed near a cordless phone base station, making that the more direct and likely source of interference. Option C is wrong because co-channel interference from a neighboring Wi-Fi network would affect both the 2.4 GHz and 5 GHz bands if the neighbor uses the same channels, and the problem is isolated to the 2.4 GHz band; moreover, the proximity to the cordless phone base is the key clue.

Full explanation →

554

MCQeasy

A user reports that their laptop cannot connect to the internet, but other devices on the same network work fine. The technician runs ipconfig and sees an IP address of 169.254.12.34 with a subnet mask of 255.255.0.0. What is the most likely cause of this issue?

A.The laptop has a static IP address configured incorrectly.

B.The DHCP server is not responding to the laptop's request.

C.The subnet mask is wrong; it should be 255.255.255.0.

D.The laptop's network adapter is faulty.

AnswerB

This is correct. When a client device is configured to obtain an IP address automatically via DHCP and fails to receive a response from a DHCP server, the operating system will self-assign an Automatic Private IP Addressing (APIPA) address. These addresses are always in the 169.254.0.0/16 range, indicating that the device cannot communicate with a DHCP server and thus cannot obtain a routable IP address for network access.

Why this answer

The IP address 169.254.12.34 with a 255.255.0.0 subnet mask is an Automatic Private IP Addressing (APIPA) address, assigned by Windows when the DHCP client fails to receive a response from a DHCP server. Since other devices on the same network work fine, the DHCP server is operational, but the laptop's DHCP request is not being answered, likely due to a network connectivity issue between the laptop and the DHCP server or a DHCP client service problem.

Exam trap

The 220-1201 exam often tests the misconception that a 169.254.x.x address indicates a faulty NIC, but the trap here is that the address is actually a sign of DHCP failure, not hardware failure, and the subnet mask 255.255.0.0 is correct for APIPA.

How to eliminate wrong answers

Option A is wrong because a static IP address configured incorrectly would typically show a user-assigned address, not the 169.254.x.x APIPA range, which is automatically assigned by the operating system when DHCP fails. Option C is wrong because the subnet mask 255.255.0.0 is correct for an APIPA address (per RFC 3927, APIPA uses a /16 prefix), and changing it to 255.255.255.0 would not resolve the underlying DHCP failure. Option D is wrong because a faulty network adapter would likely prevent any IP address from being assigned or cause link-layer issues, whereas the laptop successfully obtained an APIPA address, indicating the adapter is functional at the physical and data link layers.

Full explanation →

555

MCQhard

A technician is troubleshooting an iPhone that cannot install or update any apps from the App Store. The device is connected to Wi-Fi, and other internet services (Safari, email) work. What should the technician check first?

A.Check if the date and time are set correctly on the iPhone.

B.Verify that the Apple ID is signed in and has no payment issues.

C.Reset the iPhone's network settings.

D.Check if the iPhone is in Low Power Mode.

AnswerB

The App Store strictly requires an active and properly authenticated Apple ID for all application downloads and updates, even for free apps. If the Apple ID is not signed in, or if there are any outstanding payment issues such as an expired credit card, insufficient funds, or an unpaid balance from previous purchases, the system will prevent new downloads. This is a fundamental security and billing mechanism to ensure account integrity and proper transaction processing within Apple's ecosystem.

Why this answer

The most common cause for an iPhone being unable to install or update apps while other internet services work is an issue with the Apple ID, such as a payment method that has expired or a billing problem. The App Store requires a valid payment method on file even for free apps, and the device will block downloads until the account is resolved. Since Safari and email function normally, the network connectivity is fine, narrowing the issue to account authentication or authorization.

Exam trap

The 220-1201 exam often tests the misconception that network connectivity issues are the root cause when only one service fails, but the trap here is that candidates overlook account-level restrictions that are specific to the App Store's authentication and payment validation process.

How to eliminate wrong answers

Option A is wrong because incorrect date and time would typically cause SSL certificate errors, breaking all HTTPS connections (including Safari and email), not just App Store downloads. Option C is wrong because resetting network settings is unnecessary when Wi-Fi and other internet services are already working, indicating the network stack is functional. Option D is wrong because Low Power Mode only pauses background tasks and reduces performance but does not block manual app installations or updates from the App Store.

Full explanation →

556

MCQmedium

A technician is configuring a new server and needs to ensure that only signed operating system bootloaders can be loaded. Which UEFI feature should be enabled?

A.Enable Fast Boot

B.Enable Legacy Boot

C.Enable Secure Boot

D.Enable Boot from USB

AnswerC

Enabling Secure Boot is the correct action for enhancing server security as it is a UEFI firmware feature designed to prevent unauthorized or malicious software from loading during the system startup process. It works by verifying the digital signatures of all boot components, including the bootloader, kernel, and drivers, against a database of trusted keys stored in the firmware. If any component's signature is not valid or recognized, Secure Boot will block its execution, thereby protecting the server from rootkits and other low-level malware.

Why this answer

Secure Boot enforces cryptographic verification of bootloaders, preventing unauthorized code from running during boot. This is a key security feature in UEFI. The question tests understanding of Secure Boot's purpose and implementation.

Full explanation →

557

MCQmedium

A technician is installing a new video card in a desktop PC used for graphic design. The card has one HDMI port, one DisplayPort, and two DVI ports. The user wants to connect two 1920x1080 monitors. Which combination of ports and cables will provide the best image quality and support for both monitors?

A.Use the HDMI port for one monitor and a DVI port for the other

B.Use the HDMI port for one monitor and the DisplayPort for the other

C.Use both DVI ports for the monitors

D.Use a DisplayPort splitter to run both monitors from the single DisplayPort

AnswerB

Utilizing an HDMI port for one monitor and a DisplayPort for the other is the optimal solution for a modern dual-monitor setup. Both HDMI and DisplayPort are advanced digital interfaces that support high resolutions, fast refresh rates, and integrated audio transmission, ensuring excellent image quality and compatibility with contemporary display technologies. This combination allows for an extended desktop experience with superior performance and feature support.

Why this answer

The DisplayPort and HDMI ports both support digital video and audio, and at 1920x1080 resolution, both can deliver excellent image quality. However, DisplayPort is the preferred choice for the primary monitor in a graphic design setup because it supports higher color depths and refresh rates over longer cable lengths, and it is the native interface for modern video cards. Using HDMI for one monitor and DisplayPort for the other allows both monitors to run at their native resolution without signal degradation, while DVI (especially single-link DVI) is limited to 1920x1080 at 60 Hz and lacks the bandwidth for higher color fidelity or future upgrades.

Exam trap

A common pitfall in CompTIA A+ is assuming DVI is equivalent to HDMI or DisplayPort. In reality, DVI has bandwidth limitations (especially single-link) and lacks support for newer features like higher refresh rates and color depths, making HDMI and DisplayPort superior choices for modern graphic design setups.

How to eliminate wrong answers

Option A is wrong because while HDMI and DVI are both digital, DVI (single-link) is limited to 1920x1080 at 60 Hz and does not support audio or higher color depths, making it inferior to DisplayPort for graphic design work. Option C is wrong because using both DVI ports would force both monitors to rely on an older interface that lacks the bandwidth for higher refresh rates or color accuracy, and it does not leverage the superior DisplayPort or HDMI capabilities of the card. Option D is wrong because a DisplayPort splitter (MST hub) would require the monitors to be daisy-chained or use a hub, which can reduce maximum resolution or refresh rate and may not be supported by all monitors; it is also unnecessary when the card has multiple native ports.

Full explanation →

558

MCQmedium

A technician is configuring a network for a university campus that has multiple buildings spread across a 5-kilometer area. Each building has its own LAN, and they all need to be interconnected to share resources. Which network type best describes the overall campus network?

A.Local area network (LAN)

B.Metropolitan area network (MAN)

C.Campus area network (CAN)

D.Wide area network (WAN)

AnswerC

A campus area network interconnects multiple LANs within a limited contiguous area, such as a university's buildings across roughly 5 kilometres. It precisely matches the stem's requirement to link each building's LAN so they share resources.

Why this answer

A campus area network (CAN) is specifically designed to interconnect multiple LANs within a limited geographic area, such as a university campus or corporate park. With buildings spread across 5 kilometers, the network fits the CAN scope, which typically spans up to 10 km and uses high-speed backbone links like Gigabit Ethernet or fiber optics to connect the individual LANs.

Exam trap

The distinction between CAN and MAN can be tricky because the distance (5 km) might seem large, but a CAN is limited to a single campus or site, while a MAN connects multiple sites across a city.

How to eliminate wrong answers

Option A is wrong because a local area network (LAN) is confined to a single building or small area, not multiple buildings across 5 km. Option B is wrong because a metropolitan area network (MAN) covers a larger city-wide area, typically 10–100 km, and is often used for interconnecting multiple campuses or city offices, not a single campus. Option D is wrong because a wide area network (WAN) spans large geographic distances (e.g., countries or continents) and relies on leased lines or public infrastructure, which is overkill and not appropriate for a single campus site.

Full explanation →

559

MCQeasy

A user complains that their laptop's wireless connection drops frequently when they move around their home office. The laptop is running Windows 11 and connects to a Wi-Fi 6 router. Which of the following should a technician check FIRST?

A.The router's channel width setting.

B.The signal strength and potential interference in different locations.

C.The laptop's wireless adapter driver version.

D.The router's firmware version.

AnswerB

The drops occur when moving, indicating that signal coverage or interference varies by location. Checking signal strength and sources of interference (like walls, other APs, or appliances) is the most direct first step. This helps determine if the issue is due to dead zones or channel overlap. Tools like Wi-Fi analyzers can map coverage and identify problem areas.

Why this answer

Since the wireless connection drops only when the user moves, the most likely cause is varying signal strength or interference. Checking signal strength and interference patterns in different locations directly addresses the mobility factor. Driver, firmware, and channel width issues would typically cause consistent problems regardless of location.

Therefore, the first step is to assess the wireless environment.

Exam trap

The trap here is focusing on software or router settings when the symptom is clearly tied to physical movement, which points to signal coverage or interference.

Full explanation →

560

MCQhard

A user reports that their inkjet printer prints colors that are significantly different from what appears on the screen. The printer uses cyan, magenta, yellow, and black cartridges. What should the technician do first to resolve this issue?

A.Replace all ink cartridges with new ones

B.Run the printer's color calibration utility

C.Clean the printhead

D.Change the paper type to photo paper

AnswerB

A color calibration utility adjusts the printer's internal color tables and profiles to ensure that the colors it prints accurately match the intended input. This process typically involves printing a test pattern and using a sensor (or user input) to fine-tune the color output, correcting discrepancies in hue, saturation, and brightness. It directly addresses issues where colors are present but appear with incorrect shades or tints, aligning the printer's output with standard color profiles.

Why this answer

Color calibration aligns the printer's color output with a reference standard so that printed colors match what the user sees on screen. It adjusts the printhead alignment and color tables without replacing consumables, making it the correct first step for a color-mismatch complaint. Calibration is non-destructive and reversible, so it should always precede hardware replacement.

Exam trap

The trap here is confusing printhead cleaning (fixes clogs and streaks) with color calibration (fixes hue shifts), causing candidates to pick the more 'physical' maintenance action first.

How to eliminate wrong answers

Option A is wrong because replacing all cartridges is expensive and unnecessary when the issue is a calibration mismatch, not depleted or defective ink. Option C is wrong because cleaning the printhead addresses clogged nozzles (which cause missing colors or streaks), not a systematic color shift across all hues. Option D is wrong because changing paper type affects ink absorption and appearance but does not correct the printer's color mapping to the screen.

Full explanation →

561

MCQmedium

A company's network uses a /24 subnet mask. The IT manager asks a technician to configure a new server with a static IP address of 192.168.1.300. The technician knows this is invalid. What is the reason this IP address cannot be used?

A.The address is outside the private IP range.

B.The address is a broadcast address.

C.The address is a network address.

D.The octet value 300 exceeds the maximum of 255.

AnswerD

An IPv4 address is fundamentally structured as four distinct octets, with each octet representing an 8-bit binary number. This 8-bit representation means that the valid numerical range for each individual octet is strictly from 0 to 255, inclusive. The presence of the value 300 in the fourth octet of 192.168.1.300 directly violates this foundational rule of IPv4 addressing, rendering the entire address syntactically invalid and unusable on any IP network.

Why this answer

An IPv4 octet must be a decimal value between 0 and 255 inclusive. The value 300 exceeds this maximum, making the address 192.168.1.300 invalid. This is a fundamental rule of IPv4 addressing defined in RFC 791.

Exam trap

CompTIA often tests the octet range rule (0–255) to catch candidates who might confuse an invalid octet with other subnetting concepts like broadcast or network addresses.

How to eliminate wrong answers

Option A is wrong because 192.168.1.300 is not outside the private IP range (192.168.0.0/16 is private per RFC 1918); the address is simply malformed. Option B is wrong because a broadcast address for the 192.168.1.0/24 network would be 192.168.1.255, not 192.168.1.300. Option C is wrong because the network address for the 192.168.1.0/24 subnet is 192.168.1.0, not 192.168.1.300.

Full explanation →

562

MCQeasy

A user complains that their desktop computer cannot connect to any network shares, but they can access the internet. The technician pings the file server by IP address successfully, but pinging by hostname fails. Which network configuration issue is most likely causing this problem?

A.The DHCP server is not assigning a default gateway.

B.The subnet mask is incorrect.

C.The DNS server is not resolving local hostnames.

D.The file server has a firewall blocking ICMP.

AnswerC

When a technician can successfully ping a file server by its IP address but fails to ping it by its hostname, it strongly indicates a problem with name resolution. The Domain Name System (DNS) server is responsible for translating human-readable hostnames into numerical IP addresses. In this scenario, the DNS server is failing to provide the correct A record for the local file server's hostname, preventing the desktop from locating the server by name, even though its network path via IP is functional.

Why this answer

The user can access the internet (which relies on external DNS resolution) and can ping the file server by IP address, but cannot ping by hostname. This indicates that the local DNS server is failing to resolve the file server's hostname to its IP address. Since the user can reach the internet, the default gateway and subnet mask are likely correct, and the file server's firewall is not blocking ICMP because the IP-based ping succeeds.

Exam trap

The trap here is that candidates may assume a firewall is blocking ICMP (Option D) because they see a ping failure, but the successful ping by IP proves the firewall is not the issue, and the real problem is DNS resolution for local hostnames.

How to eliminate wrong answers

Option A is wrong because if the DHCP server were not assigning a default gateway, the user would not be able to access the internet at all, as traffic to external networks would have no route. Option B is wrong because an incorrect subnet mask would typically cause communication failures with both local and remote hosts, including the file server by IP, which is working. Option D is wrong because the file server's firewall blocking ICMP would prevent pinging by IP address as well, but the technician successfully pings the file server by IP.

Full explanation →

563

MCQhard

A technician is configuring a kiosk tablet that must connect to a wired Ethernet network for security reasons. The tablet only has a USB-C port. The network drop provides an RJ45 connection. Which of the following should the technician use to achieve a wired connection?

A.USB-C to HDMI adapter

B.USB-C to USB-A adapter with a USB Ethernet dongle

C.USB-C to Ethernet adapter

D.USB-C to DisplayPort adapter

AnswerC

A USB-C to Ethernet adapter contains an integrated network interface controller (NIC) that communicates with the tablet's operating system via the USB-C port's data lines. This adapter translates USB data packets into standard Ethernet frames and vice-versa, providing a reliable, high-speed wired network connection through a standard RJ45 port. This direct conversion is essential for stable and secure network access, particularly for kiosk applications requiring consistent connectivity.

Why this answer

The tablet has a USB-C port and needs to connect to an RJ45 Ethernet network. A USB-C to Ethernet adapter directly converts the USB-C signal to a standard RJ45 Ethernet connection, providing a wired network interface without additional adapters or protocol conversions. This is the simplest and most reliable solution for achieving a wired Ethernet connection from a USB-C-only device.

Exam trap

CompTIA often tests the candidate's ability to identify the most direct and appropriate adapter for a given port and purpose, trapping those who overcomplicate the solution by stacking adapters (like Option B) when a single-purpose adapter exists.

How to eliminate wrong answers

Option A is wrong because a USB-C to HDMI adapter is designed for video output, not network connectivity, and cannot provide an Ethernet connection. Option B is wrong because while a USB-C to USB-A adapter with a USB Ethernet dongle could technically work, it introduces unnecessary complexity and potential compatibility issues; the direct USB-C to Ethernet adapter is the intended and more efficient solution. Option D is wrong because a USB-C to DisplayPort adapter is for video output only and does not support Ethernet networking.

Full explanation →

564

MCQhard

A user reports that their new Thunderbolt 4 external GPU (eGPU) is not recognized by their laptop, which has a Thunderbolt 4 port. The eGPU works on another laptop. Which connector-related issue is most likely?

A.The laptop's Thunderbolt 4 port is disabled in BIOS.

B.The cable used is a passive USB-C cable, not an active Thunderbolt 4 cable.

C.The eGPU requires a Thunderbolt 3 port, not Thunderbolt 4.

D.The laptop's Thunderbolt 4 port is not providing enough power.

AnswerB

Thunderbolt 4 technology, especially for high-bandwidth applications like external GPUs (eGPUs) utilizing PCIe tunneling, necessitates active cables for optimal performance and reliability. Unlike passive USB-C cables, active Thunderbolt 4 cables contain integrated circuitry that regenerates and amplifies the signal, ensuring full data integrity and throughput over longer distances required for the 40 Gbps bidirectional bandwidth and dedicated PCIe data lanes. A passive USB-C cable, lacking these active components, cannot reliably support the complex signaling and high data rates an eGPU demands, leading to connection failure or limited functionality.

Why this answer

Thunderbolt 4 requires an active cable for full functionality, and a passive USB-C cable may not carry the PCIe signal needed for eGPU operation. This tests understanding of Thunderbolt cable requirements and the difference between passive and active cables.

Full explanation →

565

MCQeasy

A technician is setting up a small office with 15 devices and needs to assign private IP addresses. The router's LAN interface is 10.0.0.1/24. Which of the following is a valid IP address for a workstation on this network?

A.10.0.1.50

B.10.0.0.0

C.10.0.0.50

D.10.0.0.255

AnswerC

The IP address 10.0.0.50 is a valid host address within the 10.0.0.0/24 subnet. For a /24 subnet, the usable host range extends from 10.0.0.1 to 10.0.0.254, excluding the network address (10.0.0.0) and the broadcast address (10.0.0.255). This address can be successfully assigned to a device, allowing it to communicate on the local network and access the internet via the router.

Why this answer

(10.0.0.50) is correct because the router's LAN interface is configured with the IP address 10.0.0.1 and a subnet mask of /24 (255.255.255.0). This defines the network as 10.0.0.0/24, which includes usable host addresses from 10.0.0.1 to 10.0.0.254. 10.0.0.50 falls within this valid host range.

Exam trap

CompTIA often tests the distinction between network, broadcast, and usable host addresses within a given CIDR prefix, and the trap here is that candidates may forget that the first and last addresses in a subnet are reserved and not assignable to hosts.

How to eliminate wrong answers

Option A is wrong because 10.0.1.50 belongs to the 10.0.1.0/24 network, which is a different subnet than the router's 10.0.0.0/24 LAN, so it would not be reachable without routing. Option B is wrong because 10.0.0.0 is the network address (all host bits zero) and cannot be assigned to a workstation; it is reserved to identify the subnet itself. Option D is wrong because 10.0.0.255 is the broadcast address for the 10.0.0.0/24 network (all host bits one) and cannot be assigned to a host.

Full explanation →

566

MCQeasy

A small business is moving to a new office that already has a fiber-optic termination point installed. They need the fastest symmetrical speeds for cloud-based applications. Which internet connection type should they choose?

A.DSL

B.Cable broadband

C.Fiber-optic

D.Satellite

AnswerC

Fiber-optic internet transmits data as pulses of light through thin strands of glass or plastic, offering unparalleled speed and reliability. It provides symmetrical bandwidth, meaning upload and download speeds are equally fast, which is essential for cloud-based applications, large file transfers, and real-time collaboration tools that modern businesses depend on. Furthermore, fiber connections are less susceptible to electromagnetic interference and signal degradation over distance, ensuring consistent performance for critical business operations.

Why this answer

Fiber-optic internet provides symmetrical speeds (equal upload and download) essential for cloud-based applications that require fast data transfer in both directions. Unlike other connection types, fiber uses light signals through glass strands, offering low latency and high bandwidth that scale to meet business needs without the distance limitations of copper-based technologies.

Exam trap

CompTIA A+ often tests the misconception that 'fast download speeds' (as with cable or DSL) are sufficient for cloud applications, but the key requirement is symmetrical speeds for bidirectional data flow, which only fiber reliably provides among the listed options.

How to eliminate wrong answers

Option A is wrong because DSL uses existing telephone lines with asymmetrical speeds (typically up to 100 Mbps download but much lower upload), and performance degrades with distance from the central office, making it unsuitable for symmetrical cloud workloads. Option B is wrong because cable broadband relies on coaxial cables shared among neighborhood users, resulting in asymmetrical speeds (high download, low upload) and variable performance during peak usage due to contention. Option D is wrong because satellite internet has high latency (typically 600-800 ms) due to the long signal path to geostationary orbit, and speeds are asymmetrical with data caps, making it impractical for real-time cloud applications.

Full explanation →

567

MCQeasy

A user reports that their laser printer is producing pages with vertical black streaks. The streaks appear in the same position on every page. Which component is most likely the cause?

A.Toner cartridge is low on toner.

B.Drum unit is scratched or damaged.

C.Fuser assembly is malfunctioning.

D.Pickup rollers are worn out.

AnswerB

A scratched or damaged drum unit is the most common cause of repeating black streaks or lines on laser printer output. The photosensitive drum is responsible for attracting and transferring toner to the paper; a physical scratch on its delicate surface disrupts the electrostatic charge in that specific area. This defect causes the scratched portion to either pick up excess toner or fail to properly release it, consistently transferring the flaw as a repeating mark on every page as the drum rotates.

Why this answer

Vertical black streaks that appear in the same position on every page are typically caused by a scratched or damaged drum unit. The drum is a cylindrical photoreceptor that transfers toner to paper; physical damage or debris on the drum surface creates repeated marks at the same location on each page.

Exam trap

The trap is confusing symptoms of different printer components; candidates might choose fuser or toner, but vertical streaks are a classic sign of drum damage.

How to eliminate wrong answers

Option A is wrong because low toner typically causes faded or uneven printouts, not sharp vertical streaks. Option C is wrong because a malfunctioning fuser usually causes smudging, toner not fusing, or repeated marks that can be wiped off, but not consistent vertical streaks. Option D is wrong because worn pickup rollers cause paper feed issues, such as misfeeds or jams, not print quality streaks.

Full explanation →

568

MCQeasy

A customer complains that their PC randomly shuts down after about 30 minutes of use, especially when playing games. The case feels warm to the touch. What should you check first?

A.Replace the power supply

B.Update the graphics driver

C.Check CPU and GPU temperatures

D.Run a memory diagnostic

AnswerC

The description of "random shutdowns" combined with a "warm case" strongly indicates that the system is overheating, causing the CPU or GPU to reach critical temperatures. Modern processors and graphics cards have built-in thermal protection mechanisms that will automatically shut down the system to prevent permanent hardware damage. Monitoring these temperatures with diagnostic software like HWMonitor or SpeedFan is the essential first step to confirm overheating before attempting any hardware replacement.

Why this answer

Random shutdowns after ~30 minutes of use, especially during gaming, combined with a warm case, strongly suggest overheating. Checking CPU and GPU temperatures first is the most logical diagnostic step to confirm thermal throttling or shutdown protection.

Exam trap

220-1201 often tests the ability to differentiate between power, thermal, and driver-related symptoms; candidates may jump to PSU replacement when the pattern (load-dependent, 30 minutes, warm case) clearly points to overheating.

How to eliminate wrong answers

Option A is wrong because a failing power supply typically causes immediate shutdowns or boot failures, not a consistent 30-minute pattern tied to load. Option B is wrong because graphics driver issues usually cause crashes, artifacts, or blue screens, not clean shutdowns. Option D is wrong because memory problems typically cause blue screens or application crashes, not thermal-related shutdowns.

Full explanation →

569

MCQmedium

A technician is configuring a new workstation for video editing. After installing a high-end GPU and additional RAM, the system powers on but the screen is blank. The motherboard has diagnostic LEDs; the VGA LED is lit. What is the most likely issue?

A.Incompatible RAM

B.Loose GPU power cables

C.Faulty CPU

D.Monitor set to wrong input

AnswerB

High-performance graphics processing units (GPUs), especially those used in video editing workstations, often require supplementary power beyond what the PCIe slot can provide. These GPUs utilize dedicated 6-pin or 8-pin PCIe power connectors directly from the power supply. If these cables are loose or not connected, the GPU will not receive sufficient power to initialize, causing the motherboard's diagnostic VGA LED to illuminate, indicating a graphics subsystem failure.

Why this answer

A lit VGA diagnostic LED on the motherboard indicates that the system is failing the video initialization phase of POST. The most common cause after installing a high-end GPU is that the GPU's auxiliary power cables (6-pin or 8-pin PCIe power connectors) are not connected or not fully seated. Without adequate power, the GPU cannot initialize, and the motherboard halts at the VGA check.

Exam trap

220-1201 often tests the interpretation of motherboard diagnostic LEDs — candidates see 'blank screen' and jump to monitor/cable issues (Option D) instead of recognizing that a lit VGA LED points to GPU power or seating problems.

How to eliminate wrong answers

Option A is wrong because incompatible RAM would typically trigger a DRAM diagnostic LED (not VGA) or produce beep codes related to memory, and the system would fail earlier in POST. Option C is wrong because a faulty CPU would usually light the CPU LED or cause no POST at all, not specifically the VGA LED. Option D is wrong because a monitor input setting issue would not cause a motherboard diagnostic LED to light — the LED indicates an internal hardware detection failure, not a display configuration problem.

Full explanation →

570

MCQeasy

A user complains that their VoIP phone intermittently loses connectivity. The phone is connected to a switch via a 50-meter run of solid-core Cat6 cable. You suspect interference from nearby fluorescent lights. Which cabling characteristic is most relevant to this issue?

A.The cable is not properly terminated with RJ45 connectors.

B.The cable is not shielded (STP).

C.The cable length exceeds the maximum for Cat6.

D.The cable is a crossover cable.

AnswerB

Unshielded twisted-pair cabling lacks the foil or braid that blocks electromagnetic interference, so fluorescent lighting induces noise on the 50-metre run. Shielded (STP) cable would satisfy the requirement to resist that interference and stabilise VoIP connectivity.

Why this answer

Fluorescent lights generate electromagnetic interference (EMI), which can disrupt data transmission over unshielded twisted-pair (UTP) cabling. Shielded twisted-pair (STP) cable includes a conductive shield that protects against EMI, making it the relevant characteristic for this issue. The user's intermittent connectivity is likely caused by EMI coupling onto the UTP cable, and using STP would mitigate this.

Exam trap

In the CompTIA A+ exam, this question tests understanding of how electromagnetic interference (EMI) from sources like fluorescent lights affects UTP cabling and the importance of using shielded twisted-pair (STP). The trap is that candidates may incorrectly attribute the issue to cable length or termination, overlooking that interference is a shielding problem, not a distance or connector issue.

How to eliminate wrong answers

Option A is wrong because improper termination (e.g., untwisted pairs, poor crimp) would cause persistent errors or link failures, not intermittent connectivity specifically tied to EMI from fluorescent lights. Option C is wrong because the maximum length for Cat6 is 100 meters (328 feet) for 10GBASE-T and 100 meters for 1000BASE-T; a 50-meter run is well within specification. Option D is wrong because a crossover cable is used to connect two similar devices (e.g., switch to switch) without an uplink port; it does not affect susceptibility to interference, and modern switches auto-MDIX negate the need for crossover cables.

Full explanation →

571

MCQhard

A technician is troubleshooting a legacy application that uses FTP for file transfers. The transfers work but are extremely slow. The network team mentions that the firewall is configured to inspect traffic on certain ports. Which port should be opened for FTP data transfer to improve performance?

A.Port 22

B.Port 20

C.Port 23

D.Port 69

AnswerB

Port 20 is the default data port for active FTP transfers.

Why this answer

FTP uses two channels: a control channel on port 21 and a data channel on port 20 (in active mode). When a firewall inspects traffic, it may interfere with the dynamic negotiation of the data port, causing performance degradation. Opening port 20 allows the data channel to pass through without inspection, improving transfer speed.

Exam trap

The trap here is that candidates often confuse FTP data port 20 with the control port 21, or they mistakenly associate port 22 (SSH/SFTP) with secure file transfers, overlooking that the question specifically asks for FTP data transfer performance.

How to eliminate wrong answers

Option A is wrong because port 22 is used for SSH and SFTP, not standard FTP data transfer. Option C is wrong because port 23 is used for Telnet, an unencrypted remote access protocol unrelated to FTP. Option D is wrong because port 69 is used for TFTP, a simpler, connectionless file transfer protocol that does not use separate data and control channels.

Full explanation →

572

MCQeasy

A user complains that they cannot access any websites, but they can ping external IP addresses like 8.8.8.8 successfully. Other devices on the same network work fine. Which network service is most likely failing on this user's computer?

A.DHCP

B.DNS

C.NAT

D.Proxy

AnswerB

Successful pings to 8.8.8.8 confirm IP connectivity and routing are intact, so the failure lies in name resolution. DNS converts hostnames to IP addresses; without it, browsers cannot resolve website names, while other devices using working DNS servers remain unaffected.

Why this answer

The user can ping external IP addresses (e.g., 8.8.8.8) successfully, which confirms that IP connectivity, routing, and NAT are working. However, they cannot access websites by name, which requires DNS resolution to translate domain names into IP addresses. Since other devices on the same network work fine, the issue is isolated to this computer's DNS client configuration or service, making DNS the most likely failing service.

Exam trap

CompTIA A+ often tests the distinction between IP connectivity (ping to IP) and name resolution (ping to hostname), trapping candidates who confuse a working ping to an IP with full internet functionality, when DNS is actually the broken link.

How to eliminate wrong answers

Option A is wrong because DHCP is responsible for assigning IP addresses, subnet masks, gateways, and DNS servers; if DHCP were failing, the user would likely have no IP connectivity or an APIPA address (169.254.x.x), but they can ping external IPs, so DHCP is working. Option C is wrong because NAT translates private IP addresses to a public IP for internet access; since the user can ping external IPs, NAT is functioning correctly. Option D is wrong because a proxy server acts as an intermediary for web requests; if a proxy were failing, the user might still be able to ping external IPs (if the proxy is not required for ICMP), but the symptom of being unable to access websites while other devices work fine points to a DNS issue, not a proxy misconfiguration.

Full explanation →

573

MCQmedium

A technician is troubleshooting a server that randomly resets the time and date to 2000 after being powered off for a few hours. The system otherwise boots and runs normally. Which component is most likely failing?

A.The power supply unit is failing

B.The motherboard clock crystal is defective

C.The CMOS battery needs replacement

D.The UEFI firmware has a bug

AnswerC

The CMOS battery (typically a CR2032 coin cell) provides continuous power to the Complementary Metal-Oxide-Semiconductor (CMOS) memory chip, which stores the system's BIOS/UEFI settings, including the Real-Time Clock (RTC) data (date and time). When this battery is depleted, the CMOS memory loses power when the main system power is off, causing the system to revert to default settings and lose the correct date and time upon the next boot. This directly explains why the server randomly resets its time and date.

Why this answer

The CMOS battery (typically a CR2032 coin cell) powers the real-time clock and stores BIOS/UEFI settings when the system is unplugged. When it fails, the system loses time and date after being powered off, often resetting to a default like January 1, 2000. The system still boots and runs normally because the battery is only needed to retain settings and time across power loss.

Exam trap

220-1201 often tests the classic symptom-to-component mapping, and the trap is overthinking a simple CMOS battery failure as a PSU or firmware problem because the system 'otherwise runs normally.'

How to eliminate wrong answers

Option A is wrong because a failing PSU causes random shutdowns, boot failures, or instability under load — not a consistent time/date reset after power-off. Option B is wrong because a defective motherboard clock crystal would typically cause the clock to drift or fail while powered, not reset specifically when the system is off. Option D is wrong because a UEFI firmware bug would manifest as boot errors, hardware detection issues, or instability, not a predictable time reset tied to power loss.

Full explanation →

574

MCQhard

You are troubleshooting a workstation that randomly reboots when running 3D rendering software. The CPU and GPU temperatures are normal. You have already replaced the RAM and tested the hard drive. What component is most likely the root cause?

A.The CPU is overheating despite normal readings

B.The power supply is unable to deliver consistent power under load

C.The GPU driver is corrupted

D.The motherboard has a short circuit

AnswerB

A failing power supply unit (PSU) is a very common cause of random reboots, especially when the system is under load, such as during gaming or intensive tasks. When the CPU or GPU demands more power, a weak or faulty PSU may experience significant voltage drops or excessive ripple on its output rails. These power fluctuations can fall below the stable operating thresholds required by components, causing the motherboard's power monitoring circuits to trigger an immediate system reset or shutdown to protect hardware integrity.

Why this answer

Random reboots under heavy 3D rendering load — with normal CPU/GPU temperatures and already-replaced RAM and tested storage — point to the power supply. 3D rendering drives both CPU and GPU to high power draw simultaneously, and a failing or underrated PSU cannot sustain stable voltage under that combined load, causing spontaneous reboots or shutdowns. This is a classic load-dependent power fault.

Exam trap

220-1201 often tests the misconception that random reboots under load are always thermal or RAM-related — the trap is ignoring the 'temperatures are normal' clue and the load-dependent pattern that specifically implicates the PSU.

How to eliminate wrong answers

Option A is wrong because the question states CPU and GPU temperatures are normal, which rules out thermal shutdown as the cause — overheating would show elevated temps. Option C is wrong because a corrupted GPU driver typically causes display artifacts, crashes, or BSODs with driver-related error codes, not clean random reboots under load; and it wouldn't explain reboots tied specifically to power draw. Option D is wrong because a motherboard short circuit would usually prevent boot entirely or cause immediate shutdown, not intermittent reboots only under rendering load — and a short would likely blow a fuse or damage components.

Full explanation →

575

MCQmedium

A customer reports that their new laptop cannot connect to the company's Wi-Fi network, but other devices connect fine. You need to check if the laptop's wireless adapter is functioning properly and can see available networks. Which tool should you use?

A.Cable tester

B.Loopback plug

C.Wi-Fi analyzer

D.Multimeter

AnswerC

A Wi-Fi analyzer enumerates visible SSIDs and their signal strengths using the laptop's own wireless adapter. If the adapter detects neighbouring networks but not the company SSID, the card works and the fault lies in configuration, band support or driver settings.

Why this answer

A Wi-Fi analyzer (option C) is the correct tool because it can scan for available wireless networks, display their SSIDs, signal strengths, and channels, and verify whether the laptop's wireless adapter is detecting any networks at all. This directly addresses the need to check if the adapter is functioning and can see the company's Wi-Fi, isolating the issue to the laptop's wireless hardware or configuration rather than the network itself.

Exam trap

CompTIA often tests the distinction between tools for wired vs. wireless troubleshooting, and the trap here is that candidates mistakenly choose a cable tester or loopback plug because they think of general 'connectivity testing' without recognizing that the issue is specifically wireless and requires a tool that can see RF signals and SSIDs.

How to eliminate wrong answers

Option A is wrong because a cable tester is used to verify the physical integrity and wiring of Ethernet cables (e.g., T568A/B pinouts, continuity, shorts), not for wireless connectivity or adapter functionality. Option B is wrong because a loopback plug is used to test a physical network port (e.g., RJ45 Ethernet) by sending signals back to the same device to verify transmit/receive capability, but it has no application for wireless adapters or Wi-Fi network detection. Option D is wrong because a multimeter measures electrical properties like voltage, current, and resistance, which is irrelevant for checking wireless adapter operation or scanning for Wi-Fi networks.

Full explanation →

576

MCQhard

A large conference center needs to provide Wi-Fi for 500 attendees. The IT team installs multiple 802.11ax access points. During the event, attendees report slow speeds and frequent reconnections. Analysis shows many clients are on the same channel despite multiple APs. Which advanced feature should be configured to distribute clients more evenly?

A.Enable WPA3-Enterprise for all SSIDs.

B.Configure all APs to use the same SSID and enable band steering and load balancing.

C.Set each AP to a different SSID and instruct users to connect to the least crowded one.

D.Reduce the beacon interval on all APs to 50 ms.

AnswerB

Configuring all access points with the same SSID allows clients to perceive a single, unified network, enabling seamless roaming between APs without manual intervention. Band steering actively encourages dual-band clients to connect to the less congested and higher-performing 5 GHz frequency band, optimizing individual client throughput and reducing 2.4 GHz band saturation. Concurrently, load balancing intelligently distributes clients across multiple access points based on various metrics, preventing any single AP from becoming overloaded. This combined strategy effectively optimizes channel utilization and ensures efficient Wi-Fi service for a large number of users.

Why this answer

Band steering and load balancing are advanced features designed to distribute clients evenly across access points and frequency bands. Band steering encourages dual-band clients to use the less congested 5 GHz band, while load balancing monitors AP utilization and steers new clients to less loaded APs. This directly addresses the problem of many clients clustering on the same channel despite multiple APs being available.

Exam trap

A common misconception is that security features like WPA3 or different SSIDs can solve capacity and distribution issues, when in fact only radio resource management features like band steering and load balancing address client distribution at the RF level.

How to eliminate wrong answers

Option A is wrong because WPA3-Enterprise is a security protocol that enhances authentication and encryption; it does not influence client distribution or channel utilization. Option C is wrong because using different SSIDs per AP forces manual user selection, which is impractical for 500 attendees and does not automatically balance load; it also prevents seamless roaming. Option D is wrong because reducing the beacon interval to 50 ms increases management frame overhead and can degrade performance, but it does not distribute clients more evenly across channels or APs.

Full explanation →

577

MCQmedium

A technician is installing a new power supply in a high-end gaming PC. The PSU has two +12V rails rated at 20A each. The GPU requires a single +12V rail with at least 30A. What potential issue could arise?

A.The PSU will automatically combine the rails to provide 40A to the GPU.

B.The GPU may cause overcurrent protection to trip on one rail, causing shutdowns.

C.The PSU will deliver stable power as long as the total wattage is sufficient.

D.The GPU will automatically draw power from both rails equally.

AnswerB

High-power Graphics Processing Units (GPUs) can draw significant current, often exceeding 20A under full load. In a multi-rail power supply, if a GPU's power connectors are all drawing from a single 12V rail, and its current demand surpasses that rail's Overcurrent Protection (OCP) limit (e.g., 20A), the OCP will trip. This safety mechanism will cut power to that specific rail, leading to an immediate system shutdown or instability to prevent damage.

Why this answer

A multi-rail PSU splits its +12V output across separate rails, each with its own overcurrent protection (OCP). If the GPU's 30A+ draw is concentrated on one 20A rail, that rail's OCP trips and the PSU shuts down, even though total wattage is sufficient. The rails are not automatically combined for a single load.

Exam trap

220-1201 often tests the misconception that total wattage alone determines PSU adequacy, ignoring per-rail current limits and OCP behavior on multi-rail units.

How to eliminate wrong answers

Option A is wrong because PSU rails are not automatically combined on demand — each rail has independent OCP, and a single connector is wired to one rail, so the GPU cannot draw 40A from two rails unless the PSU explicitly supports rail merging (rare). Option C is wrong because total wattage is necessary but not sufficient; per-rail current limits can still be exceeded and trip OCP. Option D is wrong because the GPU cannot 'draw from both rails equally' — it draws from whatever rail its PCIe power connectors are wired to, and the PSU does not load-balance across rails dynamically.

Full explanation →

578

MCQmedium

A technician is configuring a new printer on a network with the IP 172.16.0.50 and subnet mask 255.255.0.0. The router's LAN IP is 172.16.0.1. A workstation with IP 172.16.1.10 can ping the printer, but a workstation with IP 172.17.0.10 cannot. What is the most likely reason?

A.The printer's subnet mask is wrong.

B.The workstation with IP 172.17.0.10 is on a different network and needs a router to reach the printer.

C.The printer has a duplicate IP address.

D.The default gateway on the printer is missing.

AnswerB

The workstation with IP 172.17.0.10 resides on the 172.17.0.0/16 network, which is a distinct IP network segment from the printer's 172.16.0.0/16 network. For devices on different IP networks to communicate, a Layer 3 device, specifically a router, is required to forward traffic between these separate subnets. Without a router, direct communication between these two networks is impossible.

Why this answer

The workstation with IP 172.17.0.10 has a subnet mask of 255.255.0.0, so it considers its local network to be 172.17.0.0/16. The printer's IP 172.16.0.50 is on the 172.16.0.0/16 network. Since these are different classful networks (172.16.0.0 vs 172.17.0.0), the workstation will send traffic to its default gateway (the router) for delivery.

If the router is not configured to route between these subnets, or if the workstation lacks a default gateway, the ping fails. Option B correctly identifies that the workstation is on a different network and requires a router to reach the printer.

Exam trap

The 220-1201 exam often tests the misconception that a printer's default gateway is required for any communication, but the trap here is that the default gateway is only needed for traffic leaving the local subnet, not for receiving replies from a host on the same subnet, and the real issue is the workstation being on a different network without proper routing.

How to eliminate wrong answers

Option A is wrong because the printer's subnet mask 255.255.0.0 is correct for its IP 172.16.0.50, placing it in the 172.16.0.0/16 network, and the workstation 172.16.1.10 can ping it successfully, proving the mask is not the issue. Option C is wrong because a duplicate IP address would cause intermittent failures or conflicts for both devices, but the workstation 172.16.1.10 can consistently ping the printer, ruling out a duplicate. Option D is wrong because the default gateway on the printer is only needed for the printer to send traffic off its local subnet (e.g., to the internet or other networks); it is not required for receiving ping replies from a workstation on the same subnet (172.16.1.10) or for the workstation to initiate the ping.

Full explanation →

579

MCQeasy

A user complains that their external monitor shows a 'No Signal' message when connected to their laptop via HDMI. The laptop display works fine. You test the monitor with another computer and it works. What should you check first?

A.Replace the HDMI cable

B.Update the laptop's BIOS

C.Press the function key to switch display modes

D.Reinstall the graphics driver

AnswerC

Laptops utilize specific function key combinations, often Fn + F4 or Fn + F8, to cycle through various display output modes, such as 'PC screen only,' 'Duplicate,' 'Extend,' and 'Second screen only.' Users frequently overlook this essential step, as the operating system may not automatically activate or detect an external display without explicit user input. This is the most straightforward and common solution for an external monitor not displaying an image.

Why this answer

The most common cause of an external monitor showing 'No Signal' when the laptop display works fine is that the laptop is not sending video output to the external port. Pressing the function key (e.g., Fn+F4, Fn+F8, or a dedicated display toggle key) cycles through display modes (e.g., PC screen only, Duplicate, Extend, Second screen only). This is the first and simplest troubleshooting step because it directly addresses the output routing without introducing hardware or driver changes.

Exam trap

The CompTIA A+ exam often tests the candidate's ability to follow a logical troubleshooting methodology (start with the simplest, most likely cause) rather than jumping to hardware replacement or driver reinstallation, and the trap here is that candidates assume a hardware fault (cable or driver) when the issue is actually a software-based output routing setting.

How to eliminate wrong answers

Option A is wrong because the monitor works with another computer, proving the HDMI cable and monitor are functional; replacing the cable would be unnecessary and wastes time. Option B is wrong because updating the BIOS is a low-level firmware update that does not control display output routing or driver-level functionality; it is not a first-line step for a 'No Signal' issue. Option D is wrong because reinstalling the graphics driver is a more invasive step that should be attempted only after verifying the display mode is correctly set and the cable is secure; the driver is likely fine since the laptop display works.

Full explanation →

580

MCQeasy

A technician is setting up a virtualized test environment where each virtual machine must have a unique MAC address and IP address, and the VMs must be able to communicate with each other and the physical network. The host has only one physical NIC. Which virtual switch configuration should the technician use?

A.Internal virtual switch

B.Private virtual switch

C.Bridged (external) virtual switch

D.NAT virtual switch

AnswerC

A bridged (external) virtual switch directly connects virtual machines (VMs) to the physical network adapter of the host computer. Each VM configured with a bridged connection receives its own unique MAC address and obtains an IP address from the physical network's DHCP server, appearing as a distinct, independent device on the physical network. This setup provides full, bidirectional network access to external resources and the internet, making it ideal for a test environment requiring realistic network interaction.

Why this answer

A bridged (external) virtual switch binds the virtual switch to the host's physical NIC, allowing VMs to obtain unique MAC and IP addresses from the physical network's DHCP and communicate with both each other and external hosts. This is the only configuration that provides full connectivity to the physical LAN while giving each VM its own network identity.

Exam trap

The trap is choosing NAT because it 'provides internet access,' but NAT hides VMs behind the host IP and prevents inbound connections — only bridged mode gives each VM a unique identity on the physical LAN.

How to eliminate wrong answers

Option A is wrong because an internal virtual switch only connects VMs to the host and to each other — it does not provide access to the physical network. Option B is wrong because a private virtual switch isolates VMs from both the host and the physical network, allowing only VM-to-VM communication. Option D is wrong because a NAT virtual switch lets VMs reach external networks via the host's IP (address translation), but external hosts cannot initiate connections to the VMs, and VMs share the host's IP rather than having unique routable addresses on the physical LAN.

Full explanation →

581

MCQmedium

A customer wants to add a dedicated graphics card to their PC for gaming. The motherboard has one PCIe x16 slot, but it is currently occupied by a Wi-Fi card. The customer asks if they can use the PCIe x1 slot for the graphics card. What should the technician advise?

A.Yes, but the graphics card will run at reduced performance

B.Yes, but only if the motherboard supports SLI

C.No, the graphics card requires a PCIe x16 slot

D.No, because the Wi-Fi card must stay in the x16 slot

AnswerC

Dedicated graphics cards are universally engineered to utilize a PCI Express (PCIe) x16 slot. This slot provides the necessary physical dimensions, electrical power delivery, and 16 data lanes for optimal bandwidth, which is crucial for high-performance graphics processing. Attempting to install a graphics card into a smaller slot, such as a PCIe x1, is physically impossible without destructive modification and would severely bottleneck performance even if it could be forced.

Why this answer

A dedicated graphics card requires a PCIe x16 slot for full performance and physical compatibility; PCIe x1 slots are physically shorter and cannot accommodate a standard graphics card. Even if a riser or adapter were used, the x1 slot provides only one lane of bandwidth, severely bottlenecking the GPU. Therefore, the technician should advise that the graphics card requires a PCIe x16 slot.

Exam trap

220-1201 often tests the misconception that a graphics card can run in any PCIe slot with just reduced performance, but the physical and electrical limitations of x1 slots make it impractical, and the correct answer is that a x16 slot is required.

How to eliminate wrong answers

Option A is wrong because while a graphics card might physically fit with an adapter, the x1 slot's single lane would drastically reduce performance, and most cards cannot be powered or seated properly; it is not a viable solution. Option B is wrong because SLI is a multi-GPU technology that requires multiple x16 slots and does not enable a graphics card to run in an x1 slot. Option D is wrong because the Wi-Fi card does not need to stay in the x16 slot; it can be moved to an x1 slot, freeing the x16 slot for the graphics card.

Full explanation →

582

MCQmedium

A user reports that their laptop's keyboard types random characters when certain keys are pressed. The laptop has not been dropped or spilled on. What is the most likely hardware issue?

A.The keyboard driver is corrupted.

B.The keyboard ribbon cable is loose.

C.The keyboard has an internal short or faulty controller.

D.The operating system has a malware infection.

AnswerC

An internal short circuit within the keyboard's key matrix or a faulty integrated controller can bridge electrical pathways, simulating multiple simultaneous key presses or sending erroneous scan codes to the operating system. This hardware malfunction directly generates unpredictable input signals, leading to the appearance of random characters being typed without user interaction, necessitating keyboard replacement.

Why this answer

A keyboard with an internal short or faulty controller can cause erratic behavior like typing random characters when keys are pressed. This occurs because the short or controller failure disrupts the matrix scanning process, sending incorrect key codes to the system. Since the laptop was not dropped or spilled, physical damage like a loose ribbon cable is less likely, making an internal component failure the most probable hardware cause.

Exam trap

The 220-1201 exam often tests the distinction between hardware and software issues, and the trap here is that candidates may confuse a loose ribbon cable (which causes missing keys) with a faulty controller (which causes random characters), as both are hardware problems but with different symptoms.

How to eliminate wrong answers

Option A is wrong because a corrupted keyboard driver would typically cause all keys to fail or produce no input, not random characters; driver issues are software-based and would affect the entire keyboard uniformly. Option B is wrong because a loose ribbon cable would usually cause specific rows or columns of keys to stop working entirely, not produce random characters; it would result in missing or intermittent input, not incorrect key codes. Option D is wrong because a malware infection could cause random input through software manipulation, but the question specifies a hardware issue, and malware is a software problem that would be addressed by OS-level troubleshooting, not hardware servicing.

Full explanation →

583

MCQeasy

A small business owner wants to access their accounting software from any device, including a tablet and a home computer, without installing the software locally. Which cloud service model should the technician recommend?

A.Infrastructure as a Service (IaaS)

B.Platform as a Service (PaaS)

C.Software as a Service (SaaS)

D.Desktop as a Service (DaaS)

AnswerC

Software as a Service (SaaS) delivers fully functional applications over the internet, accessible from any device with a web browser. The provider hosts and manages all aspects of the software, including infrastructure, platform, and application maintenance, allowing the user to simply log in and use the service. This model perfectly aligns with the business owner's need to access accounting software without worrying about installation, updates, or server management.

Why this answer

Software as a Service (SaaS) provides fully functional applications over the internet, accessible from any device without local installation. The accounting software accessed via a web browser on a tablet and home computer is a classic example of SaaS.

Exam trap

220-1201 often tests the distinction between SaaS and DaaS. Candidates might think DaaS is correct because it provides access from any device, but DaaS is about virtual desktops, not specific software as a service.

How to eliminate wrong answers

Option A is wrong because IaaS provides virtualized computing resources like VMs and storage, not ready-to-use software. Option B is wrong because PaaS provides a platform for developing and deploying applications, not end-user software. Option D is wrong because DaaS provides virtual desktops, which still require installation and management of applications, and is not the same as accessing a specific software as a service.

Full explanation →

584

MCQeasy

A user reports that their workstation cannot connect to any network resources. The technician notices the network cable is plugged into the wall jack and the NIC, but the link light is off. Which of the following should the technician check FIRST?

A.The IP address configuration on the workstation.

B.The firewall rules on the workstation.

C.The DNS server settings in the operating system.

D.The patch cable and wall jack for physical damage or loose connection.

AnswerD

The link light being off indicates a physical layer issue. The first step is to verify the cable is securely connected and undamaged, and that the wall jack is active. This is the most likely cause and the quickest to check. Reseating or replacing the cable often resolves the problem.

Why this answer

The link light off indicates a physical layer problem. The first step is always to check the physical connection: cable, wall jack, and NIC port. This is the most efficient troubleshooting step and aligns with the bottom-up troubleshooting methodology.

Other options are higher-layer issues that would not cause the link light to be off.

Exam trap

The trap here is jumping to logical configuration issues like IP or DNS when the physical link light is off, which clearly points to a Layer 1 problem.

Full explanation →

585

MCQhard

A technician is troubleshooting a laptop that shuts down randomly after a few minutes of use. The fan is spinning, and the vents are clear. The CPU temperature reaches 95°C quickly. What is the most likely cause?

A.The fan is running at low speed due to a faulty fan controller.

B.The thermal paste between the CPU and heatsink has dried out.

C.The CPU is faulty and needs replacement.

D.The BIOS is set to an aggressive power-saving mode.

AnswerB

Dried thermal paste severely compromises the crucial thermal interface between the CPU's integrated heat spreader (IHS) and the heatsink. Its primary function is to fill microscopic air gaps, which are poor heat conductors, ensuring efficient heat transfer. When the paste dries and cracks, these gaps reappear, drastically reducing the heatsink's ability to draw heat away from the CPU, leading to rapid and critical overheating that triggers an immediate system shutdown to prevent permanent damage.

Why this answer

High CPU temperature despite a spinning fan indicates poor thermal transfer, often due to dried-out thermal paste or a heatsink that is not making proper contact. Reapplying thermal paste and reseating the heatsink is the solution. The fan working rules out a fan failure.

Full explanation →

586

MCQhard

A technician is migrating a database from an on-premises server to a cloud platform. The database contains sensitive customer information. The company requires that data be encrypted both at rest and in transit. Which combination of technologies should the technician implement?

A.TLS for in transit and AES-256 for at rest

B.SSL for at rest and IPsec for in transit

C.VPN for in transit and hashing for at rest

D.SSH tunneling for at rest and TLS for in transit

AnswerA

Transport Layer Security (TLS) is the industry standard protocol for encrypting data as it traverses a network, ensuring confidentiality and integrity during the database migration. Advanced Encryption Standard (AES) with a 256-bit key (AES-256) is a robust symmetric encryption algorithm widely used for encrypting data stored on disks or in databases. This combination correctly addresses both the security of data during transmission and its protection while stored, making it the most appropriate solution.

Why this answer

TLS (Transport Layer Security) is the standard protocol for encrypting data in transit over networks, and AES-256 is a symmetric block cipher widely used for encryption at rest in databases and storage. Combining TLS for transit and AES-256 for storage satisfies both requirements with industry-standard, FIPS-approved algorithms. This is the canonical pairing for regulatory frameworks like PCI DSS and HIPAA.

Exam trap

220-1201 often tests whether candidates confuse transit vs. at-rest controls and whether they mistakenly treat hashing or VPNs as substitutes for encryption at rest.

How to eliminate wrong answers

Option B is wrong because SSL is deprecated for transit encryption (TLS supersedes it) and is not an at-rest encryption mechanism, while IPsec is a network-layer transit protocol, not an at-rest control. Option C is wrong because a VPN protects data in transit, not at rest, and hashing is a one-way integrity function, not reversible encryption suitable for stored data. Option D is wrong because SSH tunneling is a transit mechanism, not at-rest encryption, and the pairing inverts the correct roles of the technologies.

Full explanation →

587

MCQmedium

A user complains that their PC emits a high-pitched whining noise when under load, and the noise stops when the system is idle. The noise is not coming from the case fans or CPU cooler. What component is most likely failing?

A.The power supply's internal fan bearing

B.The power supply's coils are vibrating due to electrical load

C.The GPU fan is hitting a wire

D.The hard drive is failing mechanically

AnswerB

This is the correct answer. Coil whine is a high-pitched sound originating from electromagnetic vibrations within the inductors (coils) of a power supply unit (PSU) or other components like GPUs. These vibrations occur when the electrical current passing through the coils changes rapidly, especially under varying or heavy electrical loads, causing the coil windings to resonate at audible frequencies. The specific frequency and intensity of the whine often correlate directly with the system's power draw and the switching frequencies of the PSU's internal components.

Why this answer

Coil whine from the power supply's inductors or transformers is common under load and can be audible. It is not typically a sign of immediate failure but can indicate a low-quality PSU. Fans and coolers produce different sounds.

Full explanation →

588

MCQeasy

A user reports that their laptop can connect to the internet when using a wired connection at home, but cannot connect to any network resources when using Wi-Fi at the office. The office uses DHCP with a scope of 192.168.10.0/24. The laptop's IP configuration shows an address of 169.254.15.22. What is the most likely cause of this issue?

A.The laptop's Wi-Fi adapter is disabled in Device Manager.

B.The office DHCP server is out of available IP addresses.

C.The laptop cannot reach the DHCP server on the office network.

D.The laptop's DNS settings are misconfigured.

AnswerC

When a laptop cannot reach the DHCP server, it fails to obtain a valid IP address, subnet mask, and other essential network configuration details. After multiple unsuccessful attempts to lease an IP address via DHCP, the operating system automatically assigns an APIPA address. This self-assigned address (in the 169.254.0.0/16 range) allows for limited local network communication but prevents access to the internet or other subnets.

Why this answer

The IP address 169.254.15.22 is an Automatic Private IP Addressing (APIPA) address (169.254.0.0/16), which Windows assigns when a DHCP client fails to receive a lease from a DHCP server. Since the laptop can connect via wired Ethernet at home but not via Wi-Fi at the office, the most likely cause is that the Wi-Fi adapter cannot communicate with the office DHCP server, preventing it from obtaining a valid 192.168.10.0/24 address.

Exam trap

The A+ exam often tests the distinction between a DHCP server that is unreachable versus one that is out of addresses; the trap here is that candidates may assume a depleted scope (Option B) is the cause, but the APIPA address specifically indicates the client never received any response, not that it received a NAK or no available lease.

How to eliminate wrong answers

Option A is wrong because if the Wi-Fi adapter were disabled in Device Manager, the laptop would not show any IP address for that interface, nor would it attempt DHCP; the presence of an APIPA address indicates the adapter is enabled and attempted DHCP. Option B is wrong because if the DHCP server were out of addresses, the server would typically send a DHCPNAK or no response, but the client would still attempt DHCP and might receive an APIPA address; however, the more direct and common cause for an APIPA address is the inability to reach the DHCP server at all, not just a depleted scope. Option D is wrong because DNS misconfiguration would not prevent the laptop from obtaining an IP address via DHCP; DNS is used for name resolution after an IP is assigned, and the APIPA address indicates the DHCP process itself failed.

Full explanation →

589

MCQmedium

A technician is configuring a tablet for a delivery driver who needs to navigate and take photos of packages. The driver complains the tablet's screen is hard to see in direct sunlight. Which accessory would best address this issue?

A.A high-brightness screen protector that boosts luminance.

B.A privacy screen filter to reduce viewing angles.

C.An anti-glare screen protector with a matte finish.

D.A sunshade hood that attaches to the tablet case.

AnswerC

An anti-glare screen protector with a matte finish is specifically designed to diffuse incident ambient light rather than reflecting it specularly. The microscopic texture of the matte surface scatters incoming light in multiple directions, effectively breaking up intense reflections from sources like direct sunlight. This diffusion significantly reduces glare and improves the contrast ratio of the display, making the on-screen content much more legible and comfortable to view in bright outdoor environments.

Why this answer

An anti-glare screen protector with a matte finish reduces reflections by scattering ambient light through a microscopic textured surface, which improves readability in direct sunlight without increasing the display's inherent brightness. This directly addresses the driver's issue of screen glare outdoors, whereas other options either fail to reduce glare or introduce impracticality for mobile use.

Exam trap

CompTIA often tests the misconception that a 'high-brightness' screen protector can increase luminance, when in fact no passive accessory can boost a display's brightness—only active solutions like a brighter backlight or an external powered shade can do so.

How to eliminate wrong answers

Option A is wrong because a high-brightness screen protector does not exist as a passive accessory; screen luminance is determined by the display's backlight, and a protector cannot boost it—it can only reduce light transmission, making the screen dimmer. Option B is wrong because a privacy screen filter narrows viewing angles to prevent side glances, but it does not reduce glare from sunlight and can actually worsen outdoor visibility by further dimming the screen. Option D is wrong because a sunshade hood, while effective in theory, is bulky, impractical for a delivery driver who needs to hold the tablet and take photos, and it does not address the screen's reflective surface itself.

Full explanation →

590

MCQhard

A technician is troubleshooting a laptop that cannot connect to a 5 GHz Wi-Fi network, but it connects to 2.4 GHz networks without issue. The laptop's Wi-Fi adapter supports both bands. What is the most likely cause?

A.The 5 GHz network is using a channel not supported by the laptop's Wi-Fi adapter.

B.The laptop is too far from the access point, or there are obstructions blocking the 5 GHz signal.

C.The laptop's Bluetooth is interfering with the 5 GHz Wi-Fi.

D.The 5 GHz network requires WPA3, which the laptop does not support.

AnswerB

5 GHz Wi-Fi signals operate at a higher frequency, which inherently results in shorter effective range and poorer penetration through physical obstructions like walls, floors, and furniture compared to 2.4 GHz signals. Consequently, if a laptop is located at a significant distance from the access point or separated by multiple barriers, the 5 GHz signal strength may degrade below a usable threshold, preventing a stable connection while a 2.4 GHz connection might still be viable. This is a very common reason for 5 GHz connectivity issues.

Why this answer

The most likely cause is distance or obstructions because 5 GHz signals have higher attenuation and shorter range compared to 2.4 GHz. Since the laptop connects to 2.4 GHz but not 5 GHz, and the adapter supports both bands, the physical environment is the primary suspect — 5 GHz is more easily blocked by walls, furniture, or simply being too far from the access point.

Exam trap

The 220-1201 exam often tests the misconception that 5 GHz connectivity issues are always due to hardware incompatibility or configuration, when in reality the most common cause is the physical limitation of 5 GHz signal propagation — distance and obstructions.

How to eliminate wrong answers

Option A is wrong because if the laptop's Wi-Fi adapter supports 5 GHz, it typically supports all standard 5 GHz channels (36–165 in most regions), and channel incompatibility is rare unless the adapter is very old or the network uses DFS channels that the adapter might not support, but this is less common than signal attenuation. Option C is wrong because Bluetooth operates at 2.4 GHz, not 5 GHz, so it cannot directly interfere with 5 GHz Wi-Fi; Bluetooth interference is a 2.4 GHz issue. Option D is wrong because WPA3 is backward compatible with WPA2, and a laptop that supports 5 GHz but not WPA3 would still connect using WPA2 if the network allows mixed mode; most 5 GHz networks do not require WPA3 exclusively.

Full explanation →

591

MCQmedium

A user complains that their smartphone's battery drains quickly even when idle. You run diagnostics and find the battery health is at 82%. The device is two years old. Which hardware servicing action is most appropriate?

A.Replace the battery with a new OEM battery.

B.Calibrate the battery by fully draining and recharging.

C.Update the operating system to the latest version.

D.Disable all background apps and notifications.

AnswerA

A smartphone battery operating at 82% of its original capacity is significantly degraded. Lithium-ion batteries naturally lose capacity over charge cycles and time, leading to reduced runtime and quicker draining. Replacing it with a new Original Equipment Manufacturer (OEM) battery restores the device's full design capacity, directly resolving the rapid discharge problem by providing a fresh power source with optimal health and performance.

Why this answer

This question tests battery replacement thresholds. A battery health below 80-85% often indicates significant degradation, causing poor runtime. Replacing the battery restores normal battery life.

Software optimization may help but is secondary to hardware replacement.

Full explanation →

592

MCQeasy

A user reports that their Android smartphone's touchscreen is unresponsive after they dropped it in a puddle. The device powers on, but the display shows distorted colors and the touch input does not register at all. What is the most likely cause of this issue?

A.The device's battery is swollen and pressing against the display

B.The digitizer and LCD have been damaged by liquid ingress

C.The device's operating system has corrupted due to water exposure

D.The screen protector is trapping moisture and blocking touch input

AnswerB

Liquid ingress, especially water, can cause immediate short circuits and corrosion on the delicate electrical traces and connectors of both the digitizer and the LCD panel. The digitizer, responsible for touch input, will cease to function correctly if its circuitry is compromised, leading to unresponsiveness. Simultaneously, the LCD, which generates the visual display, will exhibit color distortion, flickering, or complete failure due to damaged backlighting, pixel drivers, or data lines, directly matching the reported symptoms after water exposure.

Why this answer

The digitizer is the transparent layer that converts touch into electrical signals, and the LCD produces the image; both sit directly under the glass and are the first components liquid reaches after a drop cracks the seal. Water bridging the digitizer's capacitive grid kills touch registration entirely, while moisture between the LCD layers causes the distorted colors described. Because the device still powers on, the fault is isolated to the display assembly rather than the mainboard or OS.

Exam trap

The trap here is conflating 'device powers on' with 'the problem must be software or battery,' steering candidates away from the physical display assembly that the drop-plus-water scenario clearly implicates.

How to eliminate wrong answers

Option A is wrong because a swollen battery typically causes the screen to lift, bulge, or show pressure blotches, not the combination of total touch failure plus color distortion after liquid exposure. Option C is wrong because water does not 'corrupt' an operating system; OS corruption would produce boot loops, app crashes, or a black screen, not a working device with dead touch and discolored pixels. Option D is wrong because a screen protector trapping moisture might cause ghost touches or dead spots, but it cannot produce the LCD color distortion that indicates internal panel damage.

Full explanation →

593

MCQmedium

A customer reports that their network printer is not accessible from any computer on the network. The printer is connected to a switch via Ethernet, and the switch port LED is blinking green. The technician pings the printer's IP address from a computer and gets no reply. What is the most likely cause?

A.The printer's Ethernet cable is faulty.

B.The printer has an IP address conflict with another device.

C.The switch port is administratively down.

D.The printer's print spooler service is stopped.

AnswerB

An IP address conflict can cause the printer to be unreachable even though the physical connection is good. The switch LED blinks because the printer is sending frames, but the IP stack may be disabled due to the conflict.

Why this answer

The blinking green LED on the switch port indicates a good physical connection and active link, ruling out a faulty cable or administratively down port. Since the printer is not responding to pings from any computer, the most likely cause is an IP address conflict, where another device on the network is using the same IP address, causing the printer to be unreachable. This conflict can occur due to static IP misconfiguration or a DHCP server assigning the same address to multiple devices.

Exam trap

The trap here is that candidates see a blinking green LED and assume the physical layer is fine, but then incorrectly attribute the ping failure to a faulty cable or port issue, overlooking the IP layer conflict that is the most common cause of unreachable devices with good link indicators.

How to eliminate wrong answers

Option A is wrong because a faulty Ethernet cable would typically cause the switch port LED to be off or show intermittent activity, not a steady blinking green, which indicates a valid link and traffic. Option C is wrong because an administratively down switch port would have the LED off or amber, not blinking green, and the technician would need to use 'show interfaces' to verify the port status. Option D is wrong because the print spooler service being stopped affects the printer's ability to process print jobs locally, but it does not prevent the printer from responding to ICMP pings or being reachable on the network layer.

Full explanation →

594

MCQeasy

A user complains that their computer randomly shuts down after about 30 minutes of gaming. The case feels warm to the touch, and all fans are spinning. Which component is most likely causing the shutdowns?

A.Failing hard drive

B.Insufficient RAM

C.Overheating CPU or GPU

D.Loose power cable

AnswerC

Modern CPUs and GPUs are equipped with integrated thermal sensors and protection circuits designed to safeguard the hardware from irreversible damage. When these critical components reach dangerously high temperatures, the system's firmware (BIOS/UEFI) or operating system will initiate an emergency shutdown. This abrupt power-off is a deliberate safety measure, preventing thermal runaway and permanent component failure, which perfectly aligns with a complaint of random shutdowns.

Why this answer

Overheating CPU or GPU is correct because the symptom pattern — shutdown after ~30 minutes of gaming (a sustained high-load workload), a warm case, and all fans spinning — is the classic signature of thermal shutdown. Modern CPUs and GPUs have thermal protection that forces an automatic power-off when junction temperatures exceed safe limits (typically ~95-105°C for CPUs, ~90-100°C for GPUs). Gaming loads both components heavily, so heat accumulates until the protection trips.

Exam trap

220-1201 often tests the confusion between thermal shutdown and power-supply failure — candidates see 'random shutdown' and pick a loose power cable, ignoring the load-correlated timing and warm case that point to overheating.

How to eliminate wrong answers

Option A is wrong because a failing hard drive typically causes I/O errors, blue screens, boot failures, or clicking noises — not a predictable timed shutdown tied to load; drives do not trigger system power-off from thermal protection. Option B is wrong because insufficient RAM causes application crashes, out-of-memory errors, paging/performance degradation, or blue screens — not a clean shutdown after a fixed period of gaming. Option D is wrong because a loose power cable would cause random, immediate power loss unrelated to workload duration, and would typically prevent the system from staying on at all rather than shutting down specifically after 30 minutes of load.

Full explanation →

595

MCQeasy

A small business wants to connect two separate office buildings that are 150 meters apart, with no existing data cabling between them. They need a reliable, high-speed connection without running new cables. Which type of network should be implemented?

A.Personal Area Network (PAN)

B.Local Area Network (LAN)

C.Wide Area Network (WAN)

D.Metropolitan Area Network (MAN)

AnswerB

Incorrect. A Local Area Network (LAN) is typically confined to a single building and cannot span 150 meters without cables or additional devices. While a wireless bridge could extend a LAN, the most appropriate network type is MAN.

Why this answer

A Local Area Network (LAN) is the most appropriate classification. While typically confined to a single building or a small campus, a LAN can be extended to connect two nearby buildings, such as those 150 meters apart, especially when using wireless bridges. This provides a reliable, high-speed connection without the need for new physical cabling.

A MAN typically covers a much larger geographic area (several kilometers), and a WAN covers even larger distances. A PAN is for very short-range personal device connections.

Exam trap

A common mistake is to confuse the typical scope of network types. While a wireless bridge can be used in various network types, the overall classification for connecting two buildings 150 meters apart is a LAN, not a MAN. MANs are for much larger, city-wide areas (typically several kilometers).

How to eliminate wrong answers

Option A is wrong because a Personal Area Network (PAN) is designed for connecting personal devices within a very short range (typically up to 10 meters using Bluetooth or USB), and cannot span 150 meters between buildings. Option B is wrong because a Local Area Network (LAN) is confined to a single building or campus and relies on direct cabling (e.g., Cat6a) which has a maximum segment length of 100 meters before signal degradation; 150 meters exceeds this limit without repeaters or switches. Option D is wrong because a Metropolitan Area Network (MAN) typically covers a larger geographic area (e.g., a city) and is usually implemented by service providers using technologies like fiber rings or WiMAX, which is overkill and not the standard solution for connecting just two nearby buildings without existing cabling.

Full explanation →

596

MCQeasy

A user wants to upgrade their laptop from a 500GB 5400 RPM HDD to a faster storage solution without increasing power consumption. Which drive type should you recommend?

A.Another 5400 RPM HDD with a larger cache

B.A 10,000 RPM HDD

C.A SATA solid-state drive (SSD)

D.An external USB flash drive

AnswerC

A SATA solid-state drive (SSD) is the optimal upgrade choice for a laptop due to its superior performance characteristics. SSDs utilize NAND flash memory, providing dramatically faster boot times, application loading, and overall system responsiveness compared to any traditional hard disk drive. They also consume significantly less power, extending battery life, operate silently with no moving parts, and offer greater durability against physical shock, making them ideal for portable devices.

Why this answer

A SATA solid-state drive (SSD) is the correct recommendation because it offers dramatically faster read/write speeds than a 5400 RPM HDD while consuming less power — SSDs have no moving parts, so they use less energy and generate less heat. This directly satisfies the user's requirement for faster storage without increasing power consumption, making it ideal for laptop upgrades.

Exam trap

220-1201 often tests storage upgrades by pairing 'faster' with 'lower power' — candidates who focus only on speed may pick a 10,000 RPM HDD, ignoring the power consumption constraint.

How to eliminate wrong answers

Option A is wrong because another 5400 RPM HDD with a larger cache offers only marginal performance improvement and still relies on spinning platters, which consume more power than SSDs and remain slow. Option B is wrong because a 10,000 RPM HDD spins faster, which increases both power consumption and heat output — the opposite of the user's requirement — and is rarely available in laptop form factors. Option D is wrong because an external USB flash drive is slower than an internal SATA SSD, has limited write endurance, and is not a suitable primary boot/storage drive for a laptop.

Full explanation →

597

MCQhard

A technician is upgrading a workstation and notices that the new CPU is not listed in the motherboard's supported CPU list. The motherboard uses an LGA 1200 socket. What is the most likely issue?

A.The CPU is physically too large for the socket

B.The motherboard's chipset does not support that CPU generation

C.The CPU requires more power than the motherboard can provide

D.The CPU is a server-grade processor not meant for workstations

AnswerB

Even if a CPU physically fits into a motherboard's socket, the motherboard's chipset must be specifically designed to support that CPU's generation. Newer CPU generations often introduce architectural changes, updated memory controllers, or different power delivery requirements that an older chipset, even with the same physical socket, cannot properly manage. This incompatibility prevents the system from booting, recognizing the CPU, or operating stably, making chipset support a fundamental requirement for CPU functionality.

Why this answer

LGA 1200 is a physical socket used by Intel's 10th and 11th generation Core processors, but the socket alone does not guarantee CPU support — the motherboard chipset (e.g., H410, B460, Z490, H510, B560, Z590) determines which CPU generations are compatible. If the CPU is not on the QVL (Qualified Vendor List), the chipset likely does not support that generation, even though it physically fits.

Exam trap

220-1201 often tests the misconception that matching the socket (LGA 1200) guarantees CPU compatibility — candidates forget that chipset and BIOS support are equally critical.

How to eliminate wrong answers

Option A is wrong because LGA 1200 CPUs are physically uniform in footprint — if the CPU is an LGA 1200 part, it fits the socket; size is not the issue. Option C is wrong because power delivery is a motherboard VRM design concern, not a socket/chipset compatibility issue, and an unsupported CPU would typically fail to POST rather than be excluded from the support list for power reasons. Option D is wrong because server-grade processors use different sockets (LGA 4189, SP3, etc.) and would not physically fit LGA 1200 — the scenario implies a desktop CPU that fits but is unsupported.

Full explanation →

598

MCQmedium

A user complains that their external hard drive is not showing up in File Explorer, but it appears in Device Manager as a connected device. What is the most likely issue?

A.The USB port is faulty.

B.The drive needs a new driver.

C.The drive does not have a drive letter assigned.

D.The file system is corrupted.

AnswerC

For an external hard drive to be accessible and visible within File Explorer, it must have a unique drive letter (e.g., D:, E:) assigned to its primary partition. If the drive is physically connected and detected by the system, appearing in Disk Management, but lacks a drive letter, it will not be displayed or usable by the operating system or user applications via File Explorer. This common configuration issue is easily resolved by manually assigning a letter using Disk Management.

Why this answer

When a drive appears in Device Manager but not File Explorer, the hardware is detected and drivers are loaded, so the issue is at the logical volume level. The most common cause is that the drive has no drive letter assigned in Disk Management, so Windows cannot mount it as a visible volume. Assigning a drive letter resolves the issue without reinstalling drivers or replacing hardware.

Exam trap

The trap here is confusing physical detection with logical access; candidates often assume a missing drive in File Explorer means a hardware or driver failure, overlooking the simple drive letter assignment issue.

How to eliminate wrong answers

Option A is wrong because a faulty USB port would prevent the drive from appearing in Device Manager at all, not just in File Explorer. Option B is wrong because if the drive appears in Device Manager, the driver is already installed and functioning; a missing driver would show a yellow exclamation mark or unknown device. Option D is wrong because a corrupted file system would typically cause the drive to appear in File Explorer but be inaccessible or prompt a format request, not disappear entirely.

Full explanation →

599

MCQhard

A technician is setting up a thermal printer for a retail point-of-sale system that prints receipts. The printer uses direct thermal technology. After installation, the receipts are completely blank when printed. The printer feeds paper and makes printing sounds. What is the most likely cause?

A.The printer driver is not installed correctly.

B.The thermal paper is loaded upside down.

C.The printhead is dirty and needs cleaning.

D.The printer is set to 'thermal transfer' mode instead of 'direct thermal'.

AnswerB

Direct thermal printers rely on heat-sensitive paper that changes color when exposed to thermal energy from the printhead. This specialized paper has a chemically coated side designed to react to heat. If the paper is loaded upside down, the non-coated side faces the printhead, preventing the necessary chemical reaction from occurring and resulting in a completely blank page despite the paper feeding correctly.

Why this answer

Direct thermal printers use heat-sensitive paper; if the paper is loaded upside down, the thermal coating does not contact the printhead, resulting in blank output. The printer still feeds paper and makes noise because the mechanism works, but no image is produced. Other issues like driver or connection problems would typically cause errors or no activity.

Full explanation →

600

Multi-Selecthard

A company is migrating its on-premises file server to a public cloud provider. The IT team must ensure that the shared storage remains accessible to multiple virtual machines simultaneously and that the data is replicated across multiple geographic regions for disaster recovery. Which two of the following should the team implement? (Choose two.)

Select 2 answers

A.Attach the same block storage volume to all VMs using iSCSI.

B.Deploy a VPN gateway between the on-premises network and the cloud.

C.Configure a cloud file storage service with SMB protocol support.

D.Create a RAID 5 array across multiple cloud availability zones.

E.Enable cross-region replication on the storage account or file share.

AnswersC, E

A cloud file storage service that supports SMB allows multiple VMs to mount the same file share concurrently, meeting the shared access requirement. It also integrates with identity services for permissions, and the provider can replicate the share across regions when configured, satisfying the disaster recovery need without managing a separate file server.

Why this answer

A cloud file storage service with SMB support enables multiple VMs to access the same share concurrently, and enabling cross-region replication ensures the data is copied to a secondary region for disaster recovery. Together they satisfy shared access and geographic redundancy. Block storage, RAID across zones, and VPN gateways do not meet both requirements.

Exam trap

The trap here is confusing block storage multi-attach or network connectivity with a fully managed, replicated file share.

Full explanation →

CompTIA A+ Core 1 220-1201 (220-1201) — Questions 526–600