CompTIA A+ Core 1 220-1201 220-1201 Questions 751–825 | Page 11/12

751

MCQhard

A client in a rural area has a cellular hotspot for internet but experiences frequent slowdowns. They want a more stable option that does not rely on wired infrastructure. Which technology should a technician recommend?

A.DSL

B.Cable broadband

C.Fixed wireless

D.Satellite

AnswerC

Fixed wireless delivers broadband via a directional radio link to a nearby tower, avoiding both wired infrastructure and the contention and variable signal quality of a cellular hotspot. It satisfies the rural stability constraint by providing a dedicated, consistent connection.

Why this answer

Fixed wireless (C) is the correct recommendation because it provides a stable, high-speed internet connection using radio waves between a fixed antenna on the client's premises and a nearby tower, without requiring any wired infrastructure. This technology is ideal for rural areas where DSL and cable are unavailable, and it offers lower latency and more consistent performance than satellite, which suffers from high latency due to geostationary orbit distances (approximately 600 ms round-trip time).

Exam trap

The trap here is that candidates often confuse satellite with fixed wireless because both are 'wireless' and suitable for rural areas, but they overlook the critical difference in latency and stability—satellite's high latency makes it unsuitable for real-time applications like video conferencing or online gaming, which the client's 'frequent slowdowns' hint at.

How to eliminate wrong answers

Option A is wrong because DSL relies on existing copper telephone lines, which are wired infrastructure and may not be available or reliable in rural areas. Option B is wrong because cable broadband requires coaxial cable infrastructure from a cable TV provider, which is also wired and often absent in rural locations. Option D is wrong because satellite internet, while not requiring ground-based wired infrastructure, introduces high latency (typically 500–800 ms) due to the long signal travel distance to geostationary orbit, and is prone to weather-related slowdowns and data caps, making it less stable than fixed wireless.

Full explanation →

752

MCQeasy

A technician is installing a new LCD monitor for a user who does photo editing. The user complains that colors appear washed out compared to their old CRT monitor. What should the technician adjust first?

A.Replace the video cable with a DVI cable.

B.Update the graphics driver.

C.Adjust the color settings in the monitor's on-screen display.

D.Set the resolution to the monitor's native resolution.

AnswerC

Washed-out colors signify that the monitor is failing to accurately reproduce the full spectrum of colors or luminance levels, resulting in a dull appearance. The monitor's On-Screen Display (OSD) menu provides direct access to critical display parameters, including brightness, contrast, gamma, and color temperature settings. By meticulously adjusting these controls, a technician can restore proper color saturation, depth, and vibrancy, thereby directly correcting the washed-out appearance and achieving a more accurate visual output.

Why this answer

LCD monitors often have different color gamuts and settings than CRTs. The most straightforward fix is to adjust the color calibration settings in the monitor's OSD or OS to improve color accuracy.

Full explanation →

753

MCQeasy

A customer reports that their external monitor connected via HDMI to a laptop shows a 'No Signal' message, even though the laptop screen works fine. The monitor has been tested with another device and works. What should you check first?

A.Replace the HDMI cable.

B.Press the function key to toggle display output.

C.Update the graphics driver.

D.Check the monitor's power cable.

AnswerB

Pressing the function key combination (e.g., Fn + F4/F8) to toggle display output is the most common and logical first step when an external monitor displays 'No Signal' but is known to be working with other devices. Laptops frequently default to internal display only, requiring manual activation of external video ports. This action instructs the operating system and graphics hardware to detect and send a signal to the connected external display.

Why this answer

The most likely cause is that the laptop's display output has not been switched to the external monitor. On most laptops, the HDMI port is inactive until the user presses the display-toggle function key (e.g., Fn+F4, Fn+F5, or Fn+F8 depending on vendor) or uses Win+P to select 'Duplicate' or 'Extend'. Since the monitor works with another device, the monitor and cable are likely fine, making the function key the first and quickest check.

Exam trap

220-1201 often tests the troubleshooting order — candidates jump to hardware replacement (cable, monitor) when the simplest software/function-key toggle is the actual fix.

How to eliminate wrong answers

Option A is wrong because the monitor was already tested with another device and works, so the HDMI cable is unlikely to be the culprit — replacing it first wastes time. Option C is wrong because a graphics driver issue would typically affect the laptop's own display or produce artifacts, and updating drivers is a more invasive step than checking display output. Option D is wrong because the monitor powers on and works with another device, so its power cable is not the problem.

Full explanation →

754

MCQmedium

During a system boot, a user sees an error message: 'CMOS checksum error - Defaults loaded.' The system then boots normally but loses the date and time settings after power-off. What is the most likely hardware failure?

A.The UEFI firmware has become corrupted and needs reflashing.

B.The motherboard's CMOS battery is depleted or failing.

C.The power supply unit is not providing enough standby power.

D.The hard drive is failing and corrupting the boot sector.

AnswerB

The Complementary Metal-Oxide-Semiconductor (CMOS) battery provides continuous power to the CMOS RAM chip, which stores the system's BIOS/UEFI settings and the Real-Time Clock (RTC) when the computer is powered off or unplugged. When this battery depletes, the CMOS RAM loses power, causing the stored configuration (including date, time, and boot order) to revert to default values. This often triggers a "CMOS Checksum Error" during boot as the system detects the settings have been lost or corrupted.

Why this answer

The CMOS checksum error indicates that the BIOS settings are corrupted or not being retained. The date/time resetting after power-off points to a failing or dead CMOS battery, which powers the volatile memory that stores these settings when the system is off.

Full explanation →

755

MCQmedium

A user reports that their computer connected to a wall jack works fine, but when they move the computer to a different desk and plug into a different wall jack, there is no network connectivity. The switch port shows no link light. What is the most likely cause?

A.The computer's NIC is faulty.

B.The patch cable is not a crossover cable.

C.The wall jack is terminated incorrectly.

D.The switch port is administratively down.

AnswerC

An incorrectly terminated wall jack means that the individual wires within the Ethernet cable are not connected to the correct pins on the RJ-45 connector according to T568A or T568B standards. This miswiring prevents proper electrical continuity for data transmission and reception, resulting in no physical link being established between the computer's NIC and the network switch. Consequently, the link light on both the NIC and the switch port would remain unlit.

Why this answer

The most likely cause is that the wall jack at the new desk is terminated incorrectly, such as a miswired T568A/T568B standard or a broken punch-down connection. Since the computer works at the original jack and the switch port shows no link light, the issue is isolated to the new cabling path, not the NIC or switch configuration. Incorrect termination can cause a physical layer failure, preventing the switch from detecting a carrier signal.

Exam trap

The exam often tests the misconception that a faulty NIC or crossover cable is the cause, but the key clue is that the computer works at one jack and fails at another, isolating the problem to the new cabling path rather than the endpoint or switch configuration.

How to eliminate wrong answers

Option A is wrong because the computer works fine at the original wall jack, proving the NIC is functional. Option B is wrong because modern network interfaces (Gigabit Ethernet and later) support Auto-MDIX, making crossover cables unnecessary for connectivity. Option D is wrong because an administratively down switch port would show a steady amber or no link light, but the scenario states the switch port shows no link light, which is consistent with a physical layer issue, not a configuration state; additionally, if the port were administratively down, it would not affect other devices on the same switch, and the user's computer would not work at the original jack if the port were globally disabled.

Full explanation →

756

MCQmedium

A technician is troubleshooting a DHCP issue where clients are not receiving IP addresses. Which port must be open on the firewall for DHCP server communication?

A.67

B.68

C.53

D.123

AnswerA

DHCP servers listen on UDP port 67 for client broadcasts, so the firewall must permit inbound traffic there. Blocking 67 prevents DISCOVER and REQUEST messages reaching the server, which explains why clients receive no addresses.

Why this answer

DHCP servers listen on UDP port 67 for incoming client requests (DHCPDISCOVER, DHCPREQUEST). For the server to receive these messages, the firewall must allow inbound traffic to port 67. Without this port open, the server cannot process client requests, and no IP addresses are assigned.

Exam trap

A common misconception is that port 68 (the client port) is the server port, or that DHCP uses TCP instead of UDP, leading candidates to confuse the listening and response ports.

How to eliminate wrong answers

Option B (port 68) is wrong because port 68 is the DHCP client port, used by clients to receive server responses (DHCPOFFER, DHCPACK); it is not the server listening port. Option C (port 53) is wrong because port 53 is used by DNS for domain name resolution, not DHCP communication. Option D (port 123) is wrong because port 123 is used by NTP for time synchronization, not DHCP.

Full explanation →

757

MCQhard

A technician is troubleshooting a customer's smart home setup where the thermostat, lights, and door lock are controlled via a smartphone app. The devices communicate directly with each other without a central hub, but the range is limited to about 30 meters. Which network type is being used?

A.Local Area Network (LAN)

B.Wide Area Network (WAN)

C.Personal Area Network (PAN)

D.Metropolitan Area Network (MAN)

AnswerC

A Personal Area Network (PAN) is specifically designed for very short-range communication, typically within a few meters, connecting personal devices. Technologies like Bluetooth, Zigbee, and Z-Wave are commonly used to establish these direct, often peer-to-peer, connections between smart home gadgets, wearables, or peripherals without requiring extensive infrastructure. This network type is ideal for the direct interaction between smart home devices, such as sensors, lights, and controllers, within a limited personal space.

Why this answer

This scenario describes a Personal Area Network (PAN) because the devices (thermostat, lights, door lock) communicate directly with each other over a short range of approximately 30 meters without a central hub. This is characteristic of PAN technologies like Zigbee or Z-Wave, which use mesh networking to extend range and allow direct device-to-device communication within a limited area.

Exam trap

The 220-1201 exam often tests the distinction between PAN and LAN by describing a small number of devices in a home, leading candidates to incorrectly choose LAN because they associate 'local' with any home network, but the key clue is the short range and direct device-to-device communication without a hub.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) typically covers a larger area (e.g., a building or campus) and relies on a central switch or router for connectivity, not direct device-to-device communication. Option B is wrong because a Wide Area Network (WAN) spans large geographical distances (e.g., cities or countries) and uses leased lines or internet infrastructure, not short-range direct links. Option D is wrong because a Metropolitan Area Network (MAN) covers a city-sized area and requires managed infrastructure like fiber rings, not the 30-meter direct device communication described.

Full explanation →

758

MCQeasy

A customer reports that their desktop PC will not power on at all. The power supply fan does not spin, and no LEDs light up. You have verified the wall outlet is working. Which motherboard component is most likely preventing the system from starting?

A.CMOS battery

B.Front panel header

C.Chipset heatsink

D.CPU socket

AnswerB

The front panel header on the motherboard provides the crucial connection points for the system's power button, reset button, and indicator LEDs. Specifically, the power switch pins must register a momentary circuit closure to signal the motherboard's power management unit to initiate the power-on sequence. If this connection is loose, incorrectly wired, or the button itself is faulty, the power-on signal will never reach the motherboard, resulting in a complete failure to power on.

Why this answer

The front panel header connects the case's power button to the motherboard, so if it is unseated or miswired, pressing the power button sends no signal and the PSU never turns on — matching the symptom of no fan spin and no LEDs. Since the wall outlet is verified good, the break is between the button and the board. Reseating the front panel header (or jumping the PWR pins) is the standard diagnostic step.

Exam trap

The trap is over-diagnosing a no-power symptom as a PSU or CPU failure when the simplest break — the power button signal path through the front panel header — is the actual cause.

How to eliminate wrong answers

Option A is wrong because a dead CMOS battery only loses BIOS settings and system time; the machine still powers on and POSTs. Option C is wrong because a chipset heatsink is passive cooling; if it were loose the system might overheat or throttle, but it would still start. Option D is wrong because a CPU socket problem (bent pins, unseated CPU) typically still allows fans and LEDs to energize, and often produces beep codes or no-POST rather than a completely dead system.

Full explanation →

759

MCQeasy

A user complains that their desktop PC loses network connectivity intermittently, especially when the printer on the same desk starts printing. What is the most likely cause?

A.The printer is using too much bandwidth.

B.The network cable is run too close to power cables.

C.The desktop has a duplicate IP address.

D.The switch port is administratively down.

AnswerB

Running an unshielded twisted pair (UTP) network cable in close proximity and parallel to AC power cables can introduce significant electromagnetic interference (EMI). The alternating current in power lines generates magnetic fields that can induce unwanted currents and noise into the data signals carried by the network cable. This interference can corrupt data packets, leading to retransmissions or complete loss of network connectivity, especially when the power cable is actively drawing current, such as when a printer's motor or heating element activates.

Why this answer

Intermittent network connectivity that correlates with printer activity strongly suggests electromagnetic interference (EMI) from power cables affecting the unshielded twisted pair (UTP) network cable. When the printer starts, it draws more current, increasing EMI, which can corrupt data on a nearby network cable, causing packet loss and disconnects.

Exam trap

220-1201 often tests the confusion between bandwidth issues and physical layer interference; candidates may choose bandwidth because printing seems like a network-heavy task, but the symptom of intermittent connectivity tied to a specific device points to EMI.

How to eliminate wrong answers

Option A is wrong because bandwidth contention would cause slow performance, not intermittent disconnects, and a printer typically does not consume enough bandwidth to disrupt a desktop's connectivity. Option C is wrong because a duplicate IP address would cause constant connectivity issues, not intermittent ones tied to printer use. Option D is wrong because an administratively down switch port would result in no connectivity at all, not intermittent loss.

Full explanation →

760

MCQhard

A technician is troubleshooting a system that experiences random lockups and blue screens. The technician suspects a CPU issue but has already run a stress test without errors. Which diagnostic step should the technician perform next to isolate the problem?

A.Replace the CPU with a known good one

B.Update the motherboard BIOS to the latest version

C.Run a memory diagnostic tool like MemTest86

D.Check the CPU voltage in BIOS and increase it slightly

AnswerC

Running a dedicated memory diagnostic tool, such as MemTest86, is a crucial and highly effective troubleshooting step for random system lockups or crashes. Faulty RAM modules can cause unpredictable system behavior, including blue screens, application errors, and complete system freezes, often mimicking issues with the CPU or operating system. These tools perform exhaustive read/write tests on memory cells, reliably identifying intermittent or persistent errors that other diagnostics might miss, making it a logical and non-invasive first approach.

Why this answer

Random lockups and BSODs with a clean CPU stress test point strongly to faulty RAM, since memory errors corrupt kernel data and cause unpredictable crashes that don't reproduce under CPU-only load. MemTest86 boots outside the OS and writes/reads patterns across every address, catching bit flips that a CPU stress test cannot detect. This is the logical next isolation step before swapping hardware.

Exam trap

220-1201 often tests the reflex that BSODs equal CPU or driver problems, causing candidates to skip memory diagnostics even when the CPU has already been cleared by a stress test.

How to eliminate wrong answers

Option A is wrong because replacing the CPU is premature and expensive when a free, non-destructive memory test hasn't been run yet — the stress test already cleared the CPU of thermal/load faults. Option B is wrong because a BIOS update addresses firmware compatibility or microcode issues, not random hardware-level crashes, and it introduces risk without diagnostic value. Option D is wrong because raising CPU voltage without evidence of instability under load risks damaging the CPU and is not a diagnostic step — it's a speculative overclocking tweak.

Full explanation →

761

MCQmedium

A technician is deploying a new Android app across several company tablets. The app requires access to the device's camera to scan barcodes. During testing, the app fails to open the camera on one tablet but works on others. What is the most likely cause?

A.The tablet's camera hardware is defective.

B.The app is not compatible with the tablet's Android version.

C.The camera permission for the app has been denied.

D.The tablet's storage is full, preventing the app from saving photos.

AnswerC

Android's granular permission model requires explicit user consent for applications to access sensitive hardware like the camera. If the camera permission was denied for this specific new app during installation or subsequently revoked in the device's settings, the app would be prevented from initializing or accessing the camera hardware, leading to its failure to function correctly on that particular tablet. This is a common cause for app-specific hardware access issues.

Why this answer

The most likely cause is that the camera permission for the app has been denied. On Android, apps must request runtime permissions for sensitive hardware like the camera. If the user or a policy denied this permission, the app cannot access the camera, even if the hardware is functional.

This explains why the app works on other tablets where the permission was granted.

Exam trap

The 220-1201 exam often tests the distinction between hardware failure and permission denial, trapping candidates who assume a hardware defect when the issue is actually a misconfigured software permission, especially in managed device environments.

How to eliminate wrong answers

Option A is wrong because a defective camera would cause the failure on that specific tablet regardless of permission settings, but the app works on other tablets, making hardware failure less likely than a permission issue. Option B is wrong because if the app were incompatible with the Android version, it would likely fail to install or crash on launch, not just fail to open the camera during testing. Option D is wrong because full storage would prevent saving photos, but the app fails to open the camera itself, which is a permission or hardware access issue, not a storage limitation.

Full explanation →

762

MCQmedium

A network administrator wants to ensure that all devices on a subnet automatically receive IP addresses from a specific range, and that the lease time is set to 8 hours. Which configuration file or service should be modified?

A.DNS zone file

B.DHCP scope

C.NAT rules

D.QoS policy

AnswerB

A DHCP scope defines the address pool, lease duration and scope options served to clients on a given subnet. Setting the range and the 8-hour lease requires editing the scope on the DHCP server, since these parameters are scope-level, not server-level or reservation-level.

Why this answer

The DHCP scope defines the range of IP addresses that a DHCP server can assign to clients on a subnet, along with lease duration and other options. By modifying the DHCP scope, the administrator can set the specific IP address range and configure the lease time to 8 hours, ensuring all devices on that subnet automatically receive addresses from that pool.

Exam trap

CompTIA A+ exams often test the distinction between DHCP scope (which controls IP address assignment and lease time) and DNS zone file (which handles name resolution), leading candidates to confuse the two when the question involves 'automatic IP address' configuration.

How to eliminate wrong answers

Option A is wrong because a DNS zone file maps domain names to IP addresses and does not control IP address assignment or lease times. Option C is wrong because NAT rules translate private IP addresses to public ones for internet access and have no role in DHCP address allocation or lease duration. Option D is wrong because a QoS policy manages network traffic prioritization and bandwidth allocation, not IP address provisioning or lease settings.

Full explanation →

763

MCQeasy

A company is setting up a new branch office with 50 workstations and needs to connect them to the existing corporate network across a city. The connection must be dedicated and provide consistent bandwidth. Which type of WAN hardware should be installed at the branch office?

A.A DSL modem

B.A cable modem

C.A CSU/DSU

D.A wireless access point

AnswerC

A Channel Service Unit/Data Service Unit (CSU/DSU) is a crucial piece of equipment used to terminate a digital leased line, such as a T1 or E1 circuit, at the customer premises. It provides the necessary signal conversion, line conditioning, and clocking functions to ensure reliable and synchronous data transmission over the dedicated circuit. This setup guarantees a consistent, symmetrical, and private connection, making it ideal for linking corporate branch offices with specific bandwidth and uptime requirements.

Why this answer

A CSU/DSU (Channel Service Unit/Data Service Unit) is the customer-premises equipment that terminates a dedicated leased line (such as a T1/E1 or T3) and converts between the LAN's digital signaling and the carrier's WAN framing. Because the requirement specifies a dedicated connection with consistent, guaranteed bandwidth across a city, a leased line terminated by a CSU/DSU is the correct WAN hardware. DSL and cable are shared, best-effort broadband services that cannot guarantee symmetric dedicated throughput.

Exam trap

220-1201 often tests the distinction between dedicated leased-line WAN hardware (CSU/DSU) and shared broadband CPE (DSL/cable modems), so candidates who focus only on 'internet connectivity' rather than 'dedicated, consistent bandwidth' pick the wrong modem.

How to eliminate wrong answers

Option A is wrong because a DSL modem terminates a shared, best-effort DSL loop whose bandwidth varies with distance from the DSLAM and subscriber contention, so it cannot provide dedicated consistent bandwidth. Option B is wrong because a cable modem operates on a shared HFC segment where throughput is affected by neighborhood usage, not a dedicated circuit. Option D is wrong because a wireless access point is a Layer 2 LAN device that provides Wi-Fi client access and has nothing to do with WAN termination or leased-line signaling.

Full explanation →

764

MCQhard

An IT manager is comparing cable broadband and fiber-optic for a new office. They need the lowest possible latency for real-time financial trading applications. Which connection type should they choose, and why?

A.Cable broadband, because it uses coaxial cable which is faster than fiber

B.Fiber-optic, because it uses light signals and is not subject to electromagnetic interference

C.Cable broadband, because it has higher download speeds

D.Fiber-optic, because it provides lower latency due to the speed of light in glass and dedicated bandwidth

AnswerD

Fibre carries signals as light through glass, giving lower propagation latency than copper's electrical signals, and its dedicated bandwidth avoids the contention and jitter shared cable segments suffer. This directly satisfies the stem's requirement for the lowest possible latency for real-time financial trading.

Why this answer

Fiber-optic connections transmit data as light pulses through glass, which travels at approximately 2/3 the speed of light in a vacuum, significantly faster than electrical signals in copper. Additionally, fiber provides dedicated bandwidth per user, eliminating the contention and latency spikes common in cable broadband's shared coaxial architecture. This combination of propagation speed and consistent low latency makes fiber the optimal choice for real-time financial trading where microseconds matter.

Exam trap

CompTIA often tests the misconception that 'faster download speeds' or 'immunity to interference' are the primary reasons for choosing fiber, when the actual exam focus is on latency characteristics and dedicated bandwidth for time-sensitive applications.

How to eliminate wrong answers

Option A is wrong because coaxial cable does not transmit data faster than fiber; fiber-optic uses light signals that propagate at near-light speed, while electrical signals in copper are slower and subject to higher attenuation. Option B is wrong because while fiber is indeed immune to electromagnetic interference, the primary reason for choosing it in this scenario is lower latency, not EMI immunity; the question specifically asks about latency for trading applications. Option C is wrong because cable broadband's higher download speeds are burstable and shared among neighborhood users, leading to variable latency under load, which is unacceptable for real-time trading; fiber provides symmetric, dedicated bandwidth with consistent low latency.

Full explanation →

765

MCQeasy

A small business wants to run three different operating systems on a single physical server to save space and power. Each OS must have its own dedicated CPU cores, RAM, and storage, and the hypervisor must run directly on the hardware without a host OS. Which type of hypervisor should be deployed?

A.Type 2 hypervisor

B.Container-based virtualization

C.Type 1 hypervisor

D.Emulation virtualization

AnswerC

A Type 1 hypervisor, also known as a bare-metal hypervisor, installs directly onto the physical server hardware, providing direct access to system resources without an intervening host operating system. This architecture ensures maximum efficiency, performance, and isolation, making it ideal for running multiple virtual machines, each with its own dedicated resources and distinct operating system, such as three different OSes for a small business's server needs.

Why this answer

This scenario describes a Type 1 (bare-metal) hypervisor, which installs directly on hardware and allocates dedicated resources to each virtual machine. Type 1 hypervisors are used in data centers and server virtualization to maximize performance and isolation.

Full explanation →

766

MCQeasy

A technician is configuring a new workstation for a secure environment. The policy requires that only signed operating systems can boot. Which UEFI feature should be enabled?

A.Enable Legacy Boot (CSM)

B.Enable Secure Boot

C.Enable TPM

D.Set boot order to network first

AnswerB

Enabling Secure Boot is the correct action to ensure the integrity of the boot process by verifying the digital signature of every component in the boot chain, from the firmware to the operating system loader. It prevents unauthorized or malicious code from executing during startup by only allowing digitally signed and trusted bootloaders to launch. This mechanism directly addresses the requirement for bootloader signature verification, enhancing system security against rootkits and boot-level malware.

Why this answer

Secure Boot ensures that only software signed with trusted certificates can boot. This prevents unauthorized bootloaders and rootkits. This tests knowledge of UEFI security features.

Full explanation →

767

MCQeasy

A user wants to connect their laptop to a 4K external monitor for a presentation. The laptop has USB-C ports, and the monitor supports HDMI and DisplayPort. Which adapter or cable should the technician recommend for the best video quality?

A.USB-C to VGA adapter

B.USB-C to HDMI adapter

C.USB-C to DisplayPort cable

D.USB-C to DVI adapter

AnswerC

USB-C ports frequently integrate DisplayPort Alternate Mode (Alt Mode), allowing them to transmit native DisplayPort digital video signals directly over the USB-C connector. This provides superior bandwidth for uncompressed 4K (3840x2160) video at high refresh rates (e.g., 60Hz or higher) without requiring complex signal conversion. This direct digital transmission and high bandwidth capability make a USB-C to DisplayPort cable the most reliable and efficient solution for achieving optimal 4K video output.

Why this answer

A USB-C to DisplayPort cable supports native DisplayPort Alt Mode over USB-C, which can deliver uncompressed 4K video at 60Hz or higher without conversion. This provides the best video quality for a 4K external monitor, as DisplayPort is designed for high-bandwidth video and supports higher refresh rates and color depths than HDMI in many implementations.

Exam trap

CompTIA often tests the misconception that HDMI is always the best for video quality because it is common on consumer monitors, but DisplayPort actually offers higher bandwidth and native support for 4K at higher refresh rates without compression.

How to eliminate wrong answers

Option A is wrong because VGA is an analog standard limited to 1080p at best, and converting digital USB-C to analog VGA would degrade 4K quality significantly. Option B is wrong because while USB-C to HDMI can support 4K, it typically uses HDMI 1.4 or 2.0 over Alt Mode, which may cap at 30Hz for 4K or require compression, whereas DisplayPort offers native higher bandwidth (e.g., HBR3) for full 4K 60Hz without compression. Option D is wrong because DVI is a single-link or dual-link digital standard that maxes out at 1920x1200 (single-link) or 2560x1600 (dual-link), and cannot handle 4K resolution at all.

Full explanation →

768

MCQmedium

A technician is setting up a virtual lab on a laptop with 8 GB RAM and a dual-core CPU. The technician creates two VMs: one with 4 GB RAM and one with 2 GB RAM. The host OS is Windows 10. When both VMs are running, the laptop becomes unresponsive and the VMs are extremely slow. The technician checks resource monitor and sees that the host is using 95% of RAM. What should the technician do to improve performance without purchasing new hardware?

A.Enable hardware virtualization in the BIOS.

B.Reduce the RAM allocation of the 4 GB VM to 2 GB.

C.Convert the VMs to use dynamic memory allocation.

D.Move the VMs to a Type 1 hypervisor.

AnswerB

Reducing the RAM allocated to one of the virtual machines directly frees up physical memory on the host system. If a 4 GB VM is consuming too much of the host's limited RAM, reducing its allocation to 2 GB immediately makes 2 GB available for the host operating system and the other virtual machine. This action directly addresses the RAM exhaustion issue by rebalancing resource distribution without requiring additional hardware or complex configuration changes.

Why this answer

The host has 8 GB RAM, and the two VMs are configured for 4 GB + 2 GB = 6 GB, leaving only ~2 GB for Windows 10 itself, which is why the host is at 95% RAM and thrashing. Reducing the 4 GB VM to 2 GB brings total VM allocation to 4 GB, leaving ~4 GB for the host and relieving the memory pressure without new hardware.

Exam trap

220-1201 often tests whether candidates blame virtualization settings (BIOS VT-x) for performance issues that are actually caused by physical resource overcommitment — always check the math on RAM/CPU before suggesting BIOS changes.

How to eliminate wrong answers

Option A is wrong because hardware virtualization (VT-x/AMD-V) is required for the VMs to run at all; if it were disabled, the VMs would not start or would run in an extremely slow software-emulation mode, but the symptom here is memory exhaustion, not virtualization failure. Option C is wrong because dynamic memory allocation is a Hyper-V feature that lets a VM's RAM grow/shrink at runtime, but it does not reduce the configured maximum and does not solve overcommitment when both VMs demand their full allocation; it also requires guest OS support and is not a universal fix. Option D is wrong because moving to a Type 1 hypervisor (e.g., ESXi) still requires the same physical RAM — the laptop has only 8 GB, so the overcommitment problem persists regardless of hypervisor type.

Full explanation →

769

MCQmedium

A user complains that their external monitor flickers intermittently. The monitor is connected via a DVI cable to a graphics card that has both DVI-I and DVI-D ports. Which of the following is the most likely cause of the flickering?

A.The DVI cable is loose or damaged

B.The graphics card driver is outdated

C.The monitor's refresh rate is set too high

D.The DVI port is incompatible with the cable

AnswerA

A DVI cable transmits digital video signals via multiple TMDS (Transition Minimized Differential Signaling) pairs. If the cable is loose, even a slight movement can cause one or more of these critical data lines to momentarily lose contact, leading to intermittent signal corruption. Similarly, internal damage to the cable's conductors or shielding can disrupt the integrity of the digital signal, manifesting as flickering or color artifacts on the display as the signal intermittently degrades or drops.

Why this answer

A loose or damaged DVI cable is a common cause of intermittent flickering, as poor contact can disrupt the signal. DVI-I and DVI-D are compatible, so port type is less likely the issue. This tests troubleshooting skills for display connection problems.

Full explanation →

770

MCQhard

A technician is called to a warehouse where a newly installed IP camera shows 'No Signal' on the NVR. The camera is connected via a 100-meter Cat6 cable to a PoE switch. The switch port LED is off. What is the most likely cause?

A.The camera's IP address is conflicting with another device.

B.The cable length exceeds the maximum specification for Ethernet.

C.The PoE switch does not support the camera's power requirement.

D.The camera is configured for a different VLAN.

AnswerB

Standard Ethernet (10BASE-T, 100BASE-TX, 1000BASE-T) over unshielded twisted-pair (UTP) copper cabling has a maximum segment length of 100 meters (328 feet). Exceeding this specification leads to significant signal attenuation and degradation, preventing the network interface card (NIC) on the camera and the switch port from establishing a reliable physical link. Without a stable physical link, the switch port's link/activity LED will remain off, indicating no connectivity.

Why this answer

This question tests knowledge of Ethernet cable length limits. Cat6 is rated for 100 meters; at exactly that distance, signal degradation can cause link failure. The PoE switch may not provide enough power over that distance, or the cable may be slightly too long.

Full explanation →

771

MCQmedium

A technician is setting up a small office with five computers that need to share files and a printer. The office is in a single room, and no internet access is required yet. Which network type should be created?

A.Personal Area Network (PAN)

B.Local Area Network (LAN)

C.Wide Area Network (WAN)

D.Metropolitan Area Network (MAN)

AnswerB

A Local Area Network (LAN) is the ideal solution for connecting multiple devices, such as computers and printers, within a confined geographical area like a small office or a single building. LANs facilitate high-speed data transfer and enable resource sharing, allowing all connected devices to access shared files, printers, and a common internet connection efficiently. This setup perfectly matches the requirements of a small office needing to interconnect several computers for collaborative work.

Why this answer

A Local Area Network (LAN) is the correct choice because it connects devices within a limited physical area, such as a single room or office, enabling file sharing and printer access without requiring internet connectivity. LANs typically use Ethernet (IEEE 802.3) or Wi-Fi (IEEE 802.11) to provide high-speed, low-latency communication between the five computers and the printer, making it ideal for this small office setup.

Exam trap

The trap here is that candidates often confuse a PAN with a LAN because both can operate without internet, but a PAN's limited range and device count (typically 1-2 devices) make it unsuitable for a multi-computer office with a printer.

How to eliminate wrong answers

Option A is wrong because a Personal Area Network (PAN) is designed for connecting personal devices over a very short range (typically up to 10 meters), such as Bluetooth or USB, and cannot efficiently support five computers and a printer for file sharing in a single room. Option C is wrong because a Wide Area Network (WAN) spans large geographic areas (e.g., cities or countries) and requires internet or leased lines, which is unnecessary and overkill for a single-room office with no internet requirement. Option D is wrong because a Metropolitan Area Network (MAN) covers a city or campus-sized area, typically using fiber optics or high-speed backbones, and is far too large-scale and costly for a small office with only five devices.

Full explanation →

772

MCQeasy

A technician is setting up a network printer that supports both standard and secure printing. Which port should be configured for secure IPP printing?

A.Port 9100

B.Port 515

C.Port 443

D.Port 631

AnswerD

Port 631 is the officially designated and standard port for the Internet Printing Protocol (IPP). This port is used by print servers, such as CUPS (Common Unix Printing System), to manage print jobs and communicate with network printers. When IPP is implemented with TLS/SSL encryption for secure communication, often referred to as IPPS, it still utilizes Port 631, making it the correct choice for secure IPP printing.

Why this answer

Secure IPP (Internet Printing Protocol) uses HTTPS to encrypt print jobs and communications. Port 631 is the standard port for IPP, and when secured with TLS/SSL, it still uses port 631 but over HTTPS. This is defined in RFC 3510, which specifies how IPP operates over TLS, making port 631 the correct choice for secure IPP printing.

Exam trap

The trap here is that candidates often confuse port 443 (HTTPS) as the secure printing port, but the exam tests the specific IANA assignment for IPP, which is port 631, even when secured with TLS.

How to eliminate wrong answers

Option A is wrong because port 9100 is used by HP JetDirect and other raw TCP/IP printing protocols, which do not provide encryption or secure printing capabilities. Option B is wrong because port 515 is the standard port for the Line Printer Daemon (LPD) protocol, which is an older, unencrypted printing protocol and does not support secure IPP. Option C is wrong because port 443 is the default port for HTTPS web traffic, but secure IPP printing specifically uses port 631 with TLS, not port 443; while both use HTTPS, the port number for IPP is standardized as 631.

Full explanation →

773

MCQmedium

A technician is configuring a multifunction printer for a legal office that requires all scanned documents to be saved in a searchable PDF format. The printer supports OCR. Which setting must be enabled during the scan job?

A.Enable duplex scanning

B.Set the file format to TIFF

C.Enable OCR processing

D.Increase the scan resolution to 1200 DPI

AnswerC

Enabling Optical Character Recognition (OCR) processing is the correct solution because it actively analyzes the pixel data within a scanned image to identify and convert text characters into machine-readable text. This process embeds an invisible layer of searchable text within the document, typically a PDF, allowing users to select, copy, and search for specific words or phrases, thereby fulfilling the requirement for searchability.

Why this answer

This question tests knowledge of OCR (Optical Character Recognition) functionality in multifunction devices. OCR converts scanned images into searchable text within a PDF. Without OCR, the PDF would be a non-searchable image.

Full explanation →

774

MCQhard

A company's cloud-based virtual desktop infrastructure (VDI) is experiencing slow logins for users in a remote office. The network latency between the remote office and the cloud data center is 150 ms. What is the most effective solution to improve login performance?

A.Increase the bandwidth at the remote office

B.Upgrade the cloud VDI servers to faster CPUs

C.Deploy a local VDI broker or caching server at the remote office

D.Switch to a different cloud provider

AnswerC

Deploying a local VDI broker or caching server at the remote office directly addresses the impact of high latency by reducing the number of necessary round trips across the WAN. A local broker can handle initial authentication, profile loading, and policy enforcement locally, caching frequently accessed data and minimizing interactions that must traverse the 150 ms link. This significantly speeds up the login process by keeping more operations geographically closer to the user.

Why this answer

Deploying a local VDI broker or caching server at the remote office reduces the impact of high latency by handling authentication, profile loading, and cached data locally. This minimizes the number of round trips to the cloud data center during login, significantly improving performance for users in the remote office.

Exam trap

220-1201 often tests the difference between bandwidth and latency; candidates may incorrectly choose to increase bandwidth when the problem is high latency, which bandwidth cannot fix.

How to eliminate wrong answers

Option A is wrong because increasing bandwidth does not reduce latency; the 150 ms round-trip time remains, and login performance is primarily latency-bound, not bandwidth-bound. Option B is wrong because upgrading cloud VDI servers to faster CPUs addresses server-side processing, but the bottleneck is network latency between the remote office and the cloud, not CPU speed. Option D is wrong because switching cloud providers may not reduce latency if the remote office's distance to the data center remains similar; it's a costly and uncertain solution.

Full explanation →

775

MCQeasy

A user reports that their desktop computer connected to the network via a 10-meter Cat6 cable keeps losing connectivity when they move their chair. The cable runs under the desk and is occasionally stepped on. What is the most likely issue?

A.The cable is too long for reliable connectivity.

B.The cable is not shielded and picking up interference.

C.The cable has been crushed or kinked from being stepped on.

D.The network switch port is faulty.

AnswerC

Physical damage, such as crushing or kinking from being stepped on, can severely compromise the internal twisted pairs and insulation of an Ethernet cable. This damage creates intermittent breaks or shorts within the conductors, causing a loss of signal integrity that becomes apparent when the damaged section is flexed, moved, or subjected to pressure, directly aligning with the reported symptoms of intermittent loss when pressure is applied.

Why this answer

This question tests basic troubleshooting for physical cable damage. The correct answer is that the cable is likely damaged from being stepped on, causing intermittent connectivity.

Full explanation →

776

MCQmedium

A customer wants to switch from cable internet to a fixed wireless ISP (WISP) to reduce costs. What is a critical requirement for the WISP installation?

A.A direct fiber connection from the provider's office.

B.A clear line-of-sight to the provider's tower.

C.A dedicated phone line for the modem.

D.A satellite dish with a 2-foot diameter.

AnswerB

A clear line-of-sight to the provider's tower is absolutely critical for reliable fixed wireless internet service. This technology uses microwave or millimeter-wave radio frequencies that travel in a straight path. Any physical obstructions, such as buildings, dense foliage, or terrain, can attenuate, reflect, or completely block these signals, leading to significant degradation in connection speed, intermittent service, or total loss of connectivity. An unobstructed path ensures optimal signal strength and data throughput.

Why this answer

Fixed wireless internet (WISP) relies on radio frequency (RF) signals transmitted between an antenna at the customer's location and a tower operated by the provider. Unlike cable or fiber, RF signals are highly susceptible to physical obstructions such as buildings, trees, or terrain; therefore, a clear line-of-sight (LOS) is a critical requirement for establishing a reliable connection. Without LOS, signal attenuation or multipath interference will likely prevent the link from achieving usable throughput or even establishing a connection at all.

Exam trap

CompTIA often tests the distinction between fixed wireless and satellite internet, where candidates mistakenly think a satellite dish is required for any wireless connection, but fixed wireless uses a directional antenna aimed at a local tower, not a satellite in orbit.

How to eliminate wrong answers

Option A is wrong because a direct fiber connection is not required for fixed wireless; the WISP typically backhauls traffic via fiber to its tower, but the customer premises equipment (CPE) connects wirelessly, not via fiber. Option C is wrong because a dedicated phone line is irrelevant to fixed wireless; WISPs use Ethernet or Wi-Fi for local connectivity, and the modem connects via coaxial or Ethernet, not a POTS line. Option D is wrong because a satellite dish is designed for geostationary satellite communication (e.g., VSAT), not for terrestrial fixed wireless; WISPs use directional antennas (e.g., panel or parabolic grids) that operate in unlicensed or licensed bands (e.g., 5 GHz, 11 GHz) and are typically smaller than 2 feet, though size depends on frequency and distance.

Full explanation →

777

MCQhard

A technician is servicing a tablet that will not power on. The technician has confirmed the battery is charged by testing it with a multimeter (voltage within spec). The power button feels normal when pressed. What is the most likely hardware component that has failed, and how should it be addressed?

A.Replace the LCD screen assembly.

B.Replace the motherboard.

C.Reseat or replace the power button flex cable.

D.Perform a hard reset by holding the power and volume buttons for 30 seconds.

AnswerC

This is the correct troubleshooting step because even if the physical power button feels normal, the underlying flex cable connecting it to the motherboard can be damaged, loose, or corroded. Such an issue would prevent the electrical signal from reaching the power management IC or the main board, effectively rendering the device unable to power on despite a charged battery. Reseating or replacing this inexpensive component is a logical and often successful first hardware repair for a no-power symptom.

Why this answer

The power button flex cable is the most likely failed component because the battery is confirmed good (voltage within spec) and the power button itself feels normal, indicating the button mechanism is intact but the electrical connection to the motherboard is broken. Reseating or replacing the flex cable restores the circuit that signals the power management IC to initiate boot, which is a common failure point in tablets due to flex cable wear or loose connection.

Exam trap

The trap here is that candidates assume a 'normal-feeling' power button means the entire button circuit is working, when in fact the flex cable can fail internally or at the connector while the button dome remains physically intact.

How to eliminate wrong answers

Option A is wrong because the LCD screen assembly does not prevent the tablet from powering on; a failed LCD would still allow the device to boot (e.g., hear sounds or feel vibrations) but display nothing. Option B is wrong because replacing the motherboard is a last-resort step only after verifying all simpler, cheaper components like the power button flex cable, battery, and charging port are functional; the battery voltage is within spec, so the motherboard is not the most likely failure. Option D is wrong because a hard reset (holding power and volume buttons for 30 seconds) is a software-level troubleshooting step that cannot fix a hardware disconnection in the power button flex cable; it only forces a reboot if the device is frozen but powered on, not if it fails to power on at all.

Full explanation →

778

MCQhard

A technician is configuring a server that requires maximum memory bandwidth for virtual machines. The motherboard has four memory slots and supports dual-channel architecture. The technician installs two 16 GB DIMMs. Which configuration will provide the best performance?

A.Install both DIMMs in slots 1 and 2 (same channel)

B.Install both DIMMs in slots 1 and 3 (different channels)

C.Install one DIMM in slot 1 and leave the other empty

D.Install both DIMMs in slots 2 and 3 (adjacent slots)

AnswerB

Installing both DIMMs in slots 1 and 3, assuming they correspond to different memory channels (e.g., Channel A and Channel B), correctly enables dual-channel memory architecture. This configuration allows the memory controller to access both DIMMs simultaneously, effectively doubling the theoretical memory bandwidth. Such an interleaved access scheme is crucial for achieving maximum data throughput, which is essential for server applications demanding high memory performance and responsiveness.

Why this answer

Dual-channel memory architecture requires matched pairs of DIMMs installed in specific slots (usually slots 1 and 3 or 2 and 4) to operate in dual-channel mode. Installing them in the same channel (e.g., slots 1 and 2) forces single-channel mode, halving memory bandwidth.

Full explanation →

779

MCQhard

A technician is called to a data center where a server with a RAID 6 array of six 8 TB drives has experienced a double drive failure. The technician replaces both failed drives. After the rebuild, the array reports as healthy but the performance is extremely slow during normal operations. What is the most likely cause?

A.The new drives have a different rotational speed.

B.The array is still rebuilding in the background, consuming I/O resources.

C.The RAID controller cache battery is dead.

D.The stripe size was changed during the rebuild.

AnswerB

After a drive replacement in a RAID array, the controller initiates a lengthy rebuild process to reconstruct the lost data onto the new drive. This operation is highly I/O intensive, requiring extensive reading from the remaining healthy drives and writing to the new one, often with parity calculations. This background activity consumes a significant portion of the array's available I/O resources and processing power, directly competing with normal application requests and inevitably causing a noticeable slowdown until the rebuild is fully completed.

Why this answer

After a rebuild, the array may be performing a background consistency check or initialization that consumes I/O resources. RAID 6 rebuilds are intensive, and the controller may be verifying parity. This tests advanced RAID troubleshooting.

Full explanation →

780

MCQeasy

A technician is setting up a new tablet for a sales team member who travels frequently. The user needs to access the internet via cellular data and also connect to a Bluetooth headset. What should the technician configure first?

A.Enable airplane mode to prevent interference.

B.Insert the SIM card and configure the cellular APN settings.

C.Pair the Bluetooth headset first to ensure audio works.

D.Disable Wi-Fi to force cellular data usage.

AnswerB

This is the correct initial step for establishing cellular data connectivity on a new tablet. A Subscriber Identity Module (SIM) card authenticates the device to the cellular network, while Access Point Name (APN) settings provide the necessary configuration details for the tablet to connect to the carrier's data network. Without both a valid SIM and correctly configured APN settings, the tablet cannot access the internet via cellular data, which is often a primary requirement for a new mobile device.

Why this answer

The tablet must first have cellular connectivity established before any other network-dependent features can function. Inserting the SIM card and configuring the Access Point Name (APN) settings is the prerequisite step because the APN defines the gateway between the cellular network and the internet, including required authentication and packet data protocol (PDP) context parameters. Without a correctly configured APN, the tablet cannot obtain an IP address or route data over the cellular carrier's network, making Bluetooth headset pairing or Wi-Fi settings irrelevant for internet access.

Exam trap

The 220-1201 exam often tests the misconception that Bluetooth pairing must be done before cellular configuration because it 'requires a stable connection,' when in fact Bluetooth is a short-range, peer-to-peer radio that operates independently of cellular data provisioning.

How to eliminate wrong answers

Option A is wrong because enabling airplane mode disables all wireless radios, including cellular and Bluetooth, which would prevent both internet access and headset pairing; it is a troubleshooting step for interference, not a configuration prerequisite. Option C is wrong because pairing a Bluetooth headset is an independent, local wireless process that does not require cellular data or internet access; it can be performed at any time and does not affect cellular connectivity. Option D is wrong because disabling Wi-Fi does not enable cellular data; cellular data must be provisioned via the SIM and APN settings, and Wi-Fi can remain enabled without interfering with cellular data usage when the tablet is configured to prefer cellular.

Full explanation →

781

Multi-Selectmedium

A technician is configuring a wireless access point for a small office. The office needs to support both older laptops that only support 2.4 GHz and newer devices that support 5 GHz. The technician wants to ensure optimal performance and compatibility. Which two of the following should the technician configure? (Choose two.)

Select 2 answers

A.Disable SSID broadcast on both bands to improve security.

B.Set the 2.4 GHz band to use channel 1, 6, or 11.

C.Set the access point to use WEP encryption for backward compatibility.

D.Configure the 5 GHz band to use channel 36 at 80 MHz width.

E.Enable both 2.4 GHz and 5 GHz bands on the access point.

AnswersB, E

In the 2.4 GHz spectrum, channels 1, 6, and 11 are the only non-overlapping channels. Using one of these minimizes interference from neighboring networks. This is a best practice for 2.4 GHz Wi-Fi deployment. It ensures stable performance for older devices.

Why this answer

Enabling both 2.4 GHz and 5 GHz bands ensures compatibility with older and newer devices. Setting the 2.4 GHz band to channel 1, 6, or 11 minimizes interference. These two steps provide the best balance of compatibility and performance for a mixed-device office.

Other options either reduce security or are not required.

Exam trap

The trap here is thinking that wider channels or disabling SSID broadcast are necessary for performance, when in fact they can cause problems; the key is dual-band support and non-overlapping 2.4 GHz channels.

Full explanation →

782

MCQmedium

A technician is configuring a company-issued Android phone for a remote employee. The employee needs to access corporate email via the Gmail app and use a VPN for secure connections. After setup, the user cannot send emails from the Gmail app, but can receive them. What should the technician check first?

A.Verify that the VPN is connected and routing traffic correctly.

B.Check the outgoing mail server (SMTP) settings in the Gmail app.

C.Ensure the device has enough free storage space.

D.Reinstall the Gmail app from the Play Store.

AnswerB

Email clients utilize distinct server settings for sending and receiving mail. Incoming mail typically uses IMAP (Internet Message Access Protocol) or POP3 (Post Office Protocol version 3), while outgoing mail relies exclusively on the Simple Mail Transfer Protocol (SMTP). A misconfiguration in the SMTP server address, port number (e.g., 587 for secure connections), or authentication credentials would specifically prevent the client from establishing a connection to the outgoing mail server to send messages, without affecting the ability to retrieve new emails.

Why this answer

The Gmail app on Android uses SMTP (Simple Mail Transfer Protocol) for sending emails. Since the user can receive emails (IMAP/POP works) but cannot send, the most likely cause is incorrect SMTP server settings—such as the server address, port (e.g., 587 with STARTTLS), or authentication credentials. The technician should verify these outgoing mail server configurations first, as they are independent of VPN connectivity or storage issues.

Exam trap

The 220-1201 exam often tests the distinction between incoming (IMAP/POP) and outgoing (SMTP) mail protocols, trapping candidates who assume a network-level issue (VPN) when the problem is specific to the mail submission path.

How to eliminate wrong answers

Option A is wrong because a VPN issue would typically affect both sending and receiving, or cause a complete connectivity failure; the fact that receiving works suggests the VPN is functional. Option C is wrong because insufficient storage would manifest as an inability to download attachments or sync, not a specific failure to send emails. Option D is wrong because reinstalling the app would not fix misconfigured SMTP settings; it would only reset the app's state, and the same settings would need to be re-entered.

Full explanation →

783

MCQmedium

A user complains that their computer, which uses a RAID 1 mirror with two identical HDDs, is running very slowly. The OS is installed on the array. The technician checks and finds that one drive has a high number of bad sectors. What should be done to restore performance and data safety?

A.Remove the failing drive and continue with the good drive only.

B.Replace the failing drive with a new one and rebuild the array.

C.Defragment both drives.

D.Reformat the array and reinstall the OS.

AnswerB

Replacing the failing drive with a new, identical one is the correct and standard procedure for recovering a RAID 1 array. The system will then rebuild the array by copying all data from the healthy drive onto the new replacement drive, restoring full mirroring and fault tolerance. This process eliminates the performance degradation caused by retries on the failing drive and ensures data integrity and redundancy.

Why this answer

In a RAID 1 mirror, both drives normally serve reads in parallel, so a drive with a high number of bad sectors forces the controller to retry reads and rely on the healthy mirror, degrading performance. Replacing the failing drive and rebuilding the array restores the mirror to a healthy state, recovering both performance and redundancy. Simply removing the drive would eliminate fault tolerance and leave the system vulnerable to a single point of failure.

Exam trap

The trap here is assuming that removing the failing drive is a quick fix, when in fact it sacrifices redundancy; the exam tests whether you understand that RAID 1 requires both drives to maintain fault tolerance and performance.

How to eliminate wrong answers

Option A is wrong because removing the failing drive leaves a degraded RAID 1 array with no redundancy, so a subsequent failure of the remaining drive would cause total data loss. Option C is wrong because defragmentation addresses file fragmentation, not physical bad sectors on a failing disk, and could actually stress the failing drive further. Option D is wrong because reformatting and reinstalling destroys all data and does not address the underlying hardware failure, which would likely recur.

Full explanation →

784

MCQmedium

A technician is configuring a new wireless network for a small business. The owner wants to ensure that only company-issued laptops can connect, and that data is encrypted. The laptops support WPA2-Enterprise. Which authentication method should be used?

A.WPA2-PSK with a strong passphrase

B.WPA3-SAE (Simultaneous Authentication of Equals)

C.802.1X with a RADIUS server

D.MAC address filtering

AnswerC

802.1X provides robust, port-based network access control, requiring each connecting device to authenticate individually before gaining network access. It leverages a RADIUS (Remote Authentication Dial-In User Service) server to centralize authentication, authorization, and accounting (AAA) policies. This allows the network to verify the identity of each company laptop using credentials like certificates or usernames/passwords, ensuring only authorized devices can connect and enabling precise control over access.

Why this answer

WPA2-Enterprise uses 802.1X authentication, which requires a RADIUS server to validate individual user or device credentials. This allows the business to enforce that only company-issued laptops (which have the correct certificates or credentials) can connect, while also providing strong per-session encryption via dynamic WPA2 keys.

Exam trap

CompTIA often tests the distinction between personal-mode (PSK/SAE) and enterprise-mode (802.1X/RADIUS), and the trap here is that candidates see 'WPA2-Enterprise' in the question but then incorrectly choose WPA2-PSK or WPA3-SAE because they focus on encryption strength rather than the authentication mechanism required for per-device control.

How to eliminate wrong answers

Option A is wrong because WPA2-PSK uses a shared passphrase for all clients, which cannot restrict access to only company-issued laptops; anyone with the passphrase can connect, and there is no per-device authentication. Option B is wrong because WPA3-SAE is a personal-mode authentication method (like PSK) that uses a shared password, not enterprise-grade per-device authentication; it also does not integrate with a RADIUS server for individual credential validation. Option D is wrong because MAC address filtering is not an authentication method; it only checks the hardware address, which can be easily spoofed, and it does not provide encryption or secure credential verification.

Full explanation →

785

MCQeasy

A technician is setting up a new server that must always have the same IP address on a network using DHCP. The network administrator wants to avoid manually configuring the server's IP to prevent misconfiguration. Which method should be used to ensure the server receives the same IP from the DHCP server?

A.Set the server to use a static IP address outside the DHCP scope.

B.Configure a DHCP reservation on the router for the server's MAC address.

C.Set the server's IP address to 169.254.x.x.

D.Disable the server's network adapter and re-enable it.

AnswerB

A DHCP reservation, also known as a static DHCP assignment, binds a specific IP address to a device's unique MAC address within the DHCP server's configuration. When the server requests an IP, the DHCP server recognizes its MAC address and always provides the pre-assigned IP. This method ensures the server consistently receives the same IP address without requiring manual static IP configuration on the server itself, thus centralizing IP management and reducing potential configuration errors.

Why this answer

A DHCP reservation binds the server's MAC address to a specific IP address on the DHCP server. This ensures the server always receives the same IP from the DHCP pool without requiring manual static configuration, which aligns with the administrator's goal of avoiding misconfiguration.

Exam trap

The 220-1201 exam often tests the distinction between a DHCP reservation and a static IP address, trapping candidates who think any manual IP assignment outside the scope is acceptable, when the question specifically requires avoiding manual configuration.

How to eliminate wrong answers

Option A is wrong because setting a static IP outside the DHCP scope still requires manual configuration, which the administrator explicitly wants to avoid, and it can lead to IP conflicts if the static IP is later added to the scope. Option C is wrong because 169.254.x.x addresses are APIPA (Automatic Private IP Addressing) used when DHCP fails, not a method to guarantee a consistent IP from a DHCP server. Option D is wrong because disabling and re-enabling the network adapter only forces a new DHCP lease cycle but does not ensure the same IP address is assigned each time.

Full explanation →

786

MCQmedium

A user's cable internet goes out completely after a power outage. The modem's power light is on, but the 'online' light is blinking. What is the most likely issue?

A.The modem's firmware was corrupted during the outage.

B.The coaxial cable was damaged by the power surge.

C.The modem is re-establishing its connection to the ISP.

D.The router's DHCP server failed.

AnswerC

Following a power outage, a cable modem must complete a full boot sequence and re-establish communication with the Internet Service Provider's (ISP) cable modem termination system (CMTS). This involves a multi-step process including ranging, acquiring downstream and upstream channels, and obtaining an IP address via DHCP. A blinking "Online" or "Internet" light typically indicates that the modem is actively attempting to synchronize and register with the ISP's network, which is a normal and expected behavior after a power cycle.

Why this answer

After a power outage, the modem's power light being on indicates it has power, but the blinking 'online' light shows it has lost its upstream connection to the ISP. Cable modems use DOCSIS (Data Over Cable Service Interface Specification) to establish a link with the Cable Modem Termination System (CMTS). The blinking online light is the standard behavior during the re-initialization and ranging process, which can take several minutes as the modem negotiates frequencies, timing, and power levels with the CMTS.

Exam trap

The CompTIA A+ exam often tests the misconception that a blinking light always indicates a hardware failure or corruption, when in fact it is a standard operational state during reconnection after a power loss.

How to eliminate wrong answers

Option A is wrong because firmware corruption from a power outage is extremely rare; modems store firmware in non-volatile flash memory that is not affected by a simple loss of power, and a blinking online light is a normal post-outage behavior, not a sign of corruption. Option B is wrong because a damaged coaxial cable would typically cause the modem to fail to lock onto any downstream channel, resulting in no lights or a constant 'cable' light error, not a blinking 'online' light that indicates active negotiation. Option D is wrong because the router's DHCP server is a separate device that assigns local IP addresses; the modem's blinking online light indicates it has not yet obtained a public IP from the ISP's DHCP server, and a failed local DHCP server would not prevent the modem from establishing its WAN connection.

Full explanation →

787

MCQhard

A user's multifunction printer is displaying a 'Replace Fuser' error message, but the technician has a replacement fuser available. After installing the new fuser, the error persists. What is the most likely cause?

A.The new fuser is defective

B.The printer was not turned off during replacement

C.The fuser error must be cleared via the printer's menu or software

D.The toner cartridge is also low

AnswerC

Many modern multifunction printers utilize internal counters to track the lifespan of critical components like fusers. After a fuser is physically replaced, the printer's firmware often requires a manual reset or acknowledgment to clear the existing error code and recognize the new component. This reset is typically performed through a specific menu option on the printer's control panel, a dedicated utility software on a connected computer, or a particular key combination, allowing the printer to update its status and resume normal operation.

Why this answer

Many laser printers latch a fuser error in non-volatile memory and require an explicit reset through the printer's control panel menu or a service-mode procedure before the error clears. Simply swapping the hardware does not clear the stored fault code, so the message persists even with a functional fuser. The correct action is to clear the error via the menu or software after replacement.

Exam trap

The trap is assuming that replacing the failed hardware automatically clears the error; CompTIA often tests whether candidates know that printer firmware latches consumable and error states that must be reset through the menu or service mode.

How to eliminate wrong answers

Option A is wrong because a brand-new fuser is unlikely to be defective, and the question states the error persists immediately after replacement, which points to a latched fault rather than a bad part. Option B is wrong because while powering off is a safety best practice, leaving the printer on would not cause a persistent 'Replace Fuser' message after a correct installation. Option D is wrong because a low toner cartridge produces a distinct 'low toner' or print-quality symptom, not a fuser error message.

Full explanation →

788

MCQmedium

A user reports that their email client cannot send messages but can receive them. The technician verifies that the email server is reachable and that the user's credentials are correct. Which protocol is most likely misconfigured in the email client?

A.SMTP

B.POP3

C.IMAP

D.HTTP

AnswerA

SMTP (Simple Mail Transfer Protocol) is the standard protocol used by email clients to send outgoing email messages to an email server. If a user reports an inability to send email, it directly indicates a problem with the SMTP configuration, such as an incorrect server address, an invalid port (e.g., 25, 465 for SMTPS, or 587 for message submission), or failed authentication credentials. Proper SMTP setup is absolutely essential for successful outbound email delivery.

Why this answer

SMTP (Simple Mail Transfer Protocol) is used for sending outgoing email messages from a client to a server or between mail servers. Since the user can receive emails but not send them, and the server is reachable with correct credentials, the most likely misconfiguration is in the SMTP settings (e.g., wrong port, missing authentication, or incorrect server address).

Exam trap

The CompTIA A+ exam often tests the distinction between sending and receiving protocols, and the trap here is that candidates confuse POP3 or IMAP as being involved in sending emails, when they are strictly for retrieval.

How to eliminate wrong answers

Option B (POP3) is wrong because POP3 is a protocol for retrieving incoming emails from a mail server to a client, not for sending messages. Option C (IMAP) is wrong because IMAP is also used for receiving and managing emails on the server, not for sending. Option D (HTTP) is wrong because HTTP is a web protocol used for web browsing and not a standard protocol for email transmission; while webmail may use HTTP, the email client itself relies on SMTP for sending.

Full explanation →

789

MCQmedium

A technician is tasked with upgrading the RAM in a desktop motherboard that has four DIMM slots. The existing configuration has two 4GB sticks in slots A1 and B1. The user wants to add two more 4GB sticks for a total of 16GB. After installing the new sticks in slots A2 and B2, the system boots but only shows 8GB of RAM. What is the most likely cause?

A.The new RAM is not seated properly

B.The motherboard does not support four sticks of RAM

C.The new RAM is incompatible with the existing RAM

D.The BIOS needs an update to support higher capacity

AnswerC

RAM incompatibility, often stemming from differences in speed (MHz), timings (CL values), voltage, or even manufacturing specifics, is a common reason for partial or complete memory detection failure. When new modules are incompatible with existing ones, the motherboard's memory controller may struggle to "train" all modules together effectively. This can result in the system defaulting to recognizing only the original, compatible pair, or failing to boot entirely, as it cannot establish a stable configuration across all installed memory.

Why this answer

When mixing RAM modules, even if they are the same size, they may not be compatible if they have different timings, speeds, or ranks. The motherboard may default to the lowest common denominator or fail to recognize mismatched modules. This is a common issue when not using matched kits.

Full explanation →

790

MCQhard

A technician is configuring a network printer for secure printing using IPsec. After enabling IPsec on the printer and the print server, print jobs fail to reach the printer. The technician can ping the printer from the server. Which protocol negotiation step is most likely failing?

A.The printer is not responding to ARP requests.

B.The IPsec security association (SA) is not being established due to IKE failure.

C.The printer's TCP/IP stack is misconfigured.

D.The print server is using the wrong port number.

AnswerB

ICMP ping succeeds because it needs no encryption, but IPsec-protected print traffic requires a security association. If IKE phase 1 or phase 2 negotiation fails, no SA is built, so the printer drops the encrypted print jobs even though basic reachability is fine.

Why this answer

IPsec requires the Internet Key Exchange (IKE) protocol to negotiate and establish a security association (SA) between the printer and the print server. Since the technician can ping the printer, basic network connectivity (including ARP and IP routing) is working, but the print jobs fail because the IPsec SA is not established. An IKE failure—often due to mismatched pre-shared keys, authentication methods, or IKE phase parameters—prevents the encrypted tunnel from forming, causing all IPsec-protected traffic to be dropped.

Exam trap

CompTIA A+ exams often test the distinction between basic connectivity (ping working) and protocol-specific negotiation (IKE for IPsec), trapping candidates who assume ping success guarantees all higher-layer services will work.

How to eliminate wrong answers

Option A is wrong because the technician can successfully ping the printer, which proves that ARP resolution is working (ping relies on ARP to map the printer's IP to its MAC address). Option C is wrong because a misconfigured TCP/IP stack would typically cause ping failures or inconsistent connectivity, but the printer is reachable via ping, indicating the stack is functioning at the network layer. Option D is wrong because the print server using the wrong port number would cause a different symptom—the print job might reach the printer but be rejected or ignored—whereas here the jobs fail to reach the printer entirely, which aligns with IPsec SA failure, not a port mismatch.

Full explanation →

791

MCQmedium

A small office has several desktop PCs that intermittently fail to power on in the morning. The issue is more common on humid days. After checking the wall outlets, you find they are properly grounded. What is the most likely cause?

A.The power supply units are failing due to moisture-related internal corrosion

B.The building's circuit breaker is tripping due to overload

C.The CMOS battery is dead on each PC

D.The power button is stuck on each case

AnswerA

Moisture-related internal corrosion within a Power Supply Unit (PSU) can degrade solder joints, capacitor leads, or trace pathways on the circuit board. This degradation increases electrical resistance and can lead to intermittent power delivery issues, especially when the system is cold or after prolonged periods of inactivity, as temperature changes can exacerbate poor connections. The intermittent nature arises because the corroded path might temporarily complete the circuit under certain conditions, only to fail again when conditions shift slightly, causing the PC to intermittently fail to power on.

Why this answer

Intermittent power-on failures that are more common on humid days point to moisture-related issues inside the power supply unit. Humidity can cause condensation, leading to corrosion or short circuits within the PSU, which intermittently prevents the system from powering on. Since the outlets are properly grounded, the issue is likely internal to the PSUs.

Exam trap

220-1201 often tests the tendency to blame external power (breakers, outlets) or CMOS batteries for power-on issues, when humidity-correlated intermittent failures point to internal PSU moisture damage.

How to eliminate wrong answers

Option B is wrong because a tripping circuit breaker would affect all devices on the circuit simultaneously and would not be correlated with humidity. Option C is wrong because a dead CMOS battery causes BIOS settings loss and clock resets, not intermittent power-on failures. Option D is wrong because a stuck power button would cause consistent, not intermittent, failures and would not be humidity-related.

Full explanation →

792

MCQhard

A company is moving to a new building that has no existing internet infrastructure. They need the highest possible download speeds with low latency for cloud applications. Which connection type should they choose?

A.DSL

B.Cable

C.Fixed wireless

D.Fiber optic

AnswerD

Fiber optic internet transmits data as pulses of light through thin strands of glass or plastic, offering unparalleled bandwidth capacity and extremely low latency. This technology is immune to electromagnetic interference and does not suffer from signal degradation over long distances, ensuring consistent, high-speed, and reliable connectivity. Its superior performance characteristics make it the optimal choice for businesses heavily reliant on cloud applications, large data transfers, and real-time communication.

Why this answer

Fiber optic uses light pulses transmitted through glass or plastic strands, offering symmetrical gigabit speeds (e.g., 1 Gbps or higher) with extremely low latency (often <5 ms). This makes it ideal for cloud applications requiring high download speeds and real-time responsiveness, unlike older copper-based or wireless technologies.

Exam trap

Candidates often confuse 'high speed' with 'best for cloud apps' and pick cable or fixed wireless due to marketing speeds, ignoring the critical factors of latency consistency and symmetrical bandwidth that fiber uniquely provides.

How to eliminate wrong answers

Option A is wrong because DSL (Digital Subscriber Line) uses existing telephone copper lines, with maximum download speeds typically limited to 100 Mbps (VDSL2) and latency higher than fiber, insufficient for high-bandwidth cloud apps. Option B is wrong because cable internet (DOCSIS 3.1) shares bandwidth among neighborhood users, causing speed degradation during peak times and higher latency than fiber, making it less consistent for cloud workloads. Option C is wrong because fixed wireless (e.g., 5G or LTE) can offer high speeds but suffers from higher latency (10-50 ms) and susceptibility to interference, weather, and line-of-sight issues, failing to match fiber's low-latency and symmetrical performance.

Full explanation →

793

MCQmedium

A technician is upgrading a workstation by adding a second high-end GPU. The current power supply has a single +12V rail rated at 40A and two 6+2 pin PCIe power cables. What is the most important factor to check before proceeding?

A.Whether the motherboard has enough SATA power connectors.

B.The physical clearance inside the case for the second GPU.

C.The total power draw of the system does not exceed the PSU's +12V rail capacity.

D.The operating system supports dual GPUs.

AnswerC

The +12V rail is crucial as it supplies the primary power to the most demanding components in a workstation, including the Graphics Processing Unit (GPU) and the Central Processing Unit (CPU). Exceeding the Power Supply Unit's (PSU) rated current capacity on this rail can lead to system instability, unexpected shutdowns, component damage, or even prevent the system from booting entirely. Verifying sufficient +12V rail capacity is paramount for stable and reliable operation, especially when adding a second power-hungry GPU.

Why this answer

The most critical factor is ensuring the total power draw of the system, especially the +12V rail, does not exceed the PSU's capacity. High-end GPUs draw most of their power from the +12V rail, and adding a second GPU can easily exceed a 40A (480W) limit, causing instability or shutdown. Checking this prevents overloading the PSU.

Exam trap

220-1201 often tests the misconception that physical fit or connector count is the primary concern, when in fact power budget (especially +12V rail capacity) is the most critical factor for adding high-end GPUs.

How to eliminate wrong answers

Option A is wrong because SATA power connectors are for drives, not GPUs, and are irrelevant to adding a second GPU. Option B is wrong because physical clearance, while important, is secondary to power capacity; a system that fits but lacks power will fail. Option D is wrong because OS support for dual GPUs is a software consideration, not the most critical hardware factor before installation.

Full explanation →

794

MCQeasy

A user reports that after installing a new app on their Android phone, the device has become noticeably slower and the battery drains faster. What is the most likely cause?

A.The app is a known malware that steals personal data.

B.The app is running background services that consume resources.

C.The phone's storage is full from the app installation.

D.The app requires a newer version of Android.

AnswerB

Many applications, especially newly installed ones, initiate background services immediately upon installation to perform tasks such as initial data synchronization, indexing, push notification listening, or automatic updates. These services continuously utilize CPU cycles, RAM, and network bandwidth, even when the app is not actively in use. This constant resource consumption directly leads to noticeable system slowdown and accelerated battery depletion, aligning perfectly with the reported symptoms.

Why this answer

The most common cause of performance degradation and increased battery drain after installing a new app is that the app runs background services, such as sync adapters, location listeners, or push notification keep-alives. These services consume CPU cycles, memory, and network activity even when the app is not in the foreground, leading to slower device responsiveness and faster battery depletion.

Exam trap

The trap here is that candidates may immediately assume malware (Option A) because of the dramatic symptoms, but CompTIA A+ tests the understanding that legitimate background services are the most common and probable cause for performance and battery issues after a new app installation.

How to eliminate wrong answers

Option A is wrong because while malware can cause similar symptoms, the question states the user installed a 'new app' and does not mention any suspicious behavior, data loss, or unauthorized access; the most likely cause is legitimate background services, not necessarily malware. Option C is wrong because a single app installation typically uses only a few megabytes to a few hundred megabytes of storage, which is unlikely to fill the phone's storage to the point of causing noticeable slowdowns or battery drain; storage fullness primarily affects write performance and app installation, not CPU or battery consumption. Option D is wrong because if the app required a newer Android version, it would typically fail to install or display a compatibility error, not install successfully and then cause performance and battery issues.

Full explanation →

795

MCQeasy

A user reports that their external monitor connected via HDMI displays a 'No Signal' message, though the monitor power LED is lit. The laptop's built-in display works fine. Which of the following should be checked FIRST?

A.Update the graphics driver

B.Replace the monitor

C.Ensure the HDMI cable is fully seated at both ends

D.Adjust the screen resolution in Windows settings

AnswerC

This is the most appropriate first troubleshooting step because a loose or improperly connected cable is the most frequent cause of a "No Signal" error. A secure physical connection is essential for the digital video signal to transmit reliably from the source device to the monitor. Without a complete and stable connection, the monitor cannot detect or interpret the incoming video data stream.

Why this answer

The monitor's power LED being lit but showing 'No Signal' with a working laptop display most commonly indicates a physical connection issue, so verifying the HDMI cable is fully seated at both ends is the fastest, least invasive first step. Loose or partially inserted HDMI connectors frequently cause exactly this symptom.

Exam trap

The trap here is jumping to driver or hardware replacement when the symptom (lit LED, no signal) points to a basic physical-layer fault — CompTIA A+ 220-1201 rewards the least-invasive-first troubleshooting methodology.

How to eliminate wrong answers

Option A is wrong because updating the graphics driver is a software remediation that should come after confirming physical connectivity — it is premature and time-consuming as a first step. Option B is wrong because replacing the monitor is a drastic hardware swap unjustified when the LED indicates the monitor is powered and the symptom points to cabling. Option D is wrong because adjusting resolution in Windows settings cannot fix a 'No Signal' condition — if the OS were outputting an unsupported mode, the monitor would typically show 'Out of Range,' not 'No Signal.'

Full explanation →

796

MCQmedium

A company has two branch offices in different cities. They need to connect their LANs so employees can access resources at both locations securely over the internet. Which network type should be used?

A.Local Area Network (LAN)

B.Metropolitan Area Network (MAN)

C.Wide Area Network (WAN)

D.Personal Area Network (PAN)

AnswerC

A WAN is exactly for connecting LANs over long distances, such as between cities, often using VPNs or leased lines.

Why this answer

A Wide Area Network (WAN) is the correct choice because it connects geographically separated LANs across a large distance, such as between two cities, using public or private infrastructure like the internet. WAN technologies, such as MPLS, leased lines, or IPsec VPNs, provide secure, encrypted tunnels over the internet to ensure data confidentiality and integrity between the branch offices.

Exam trap

The 220-1201 exam often tests the misconception that a MAN can cover inter-city distances, but MANs are limited to a metropolitan area (typically up to 100 km), whereas a WAN is required for connections spanning multiple cities or countries.

How to eliminate wrong answers

Option A is wrong because a Local Area Network (LAN) is confined to a single building or campus and cannot span the distance between two cities. Option B is wrong because a Metropolitan Area Network (MAN) typically covers a city or metropolitan region, not the inter-city distance required here. Option D is wrong because a Personal Area Network (PAN) covers only a few meters around an individual (e.g., Bluetooth or USB connections) and is unsuitable for connecting remote offices.

Full explanation →

797

MCQmedium

A technician is setting up a mobile point-of-sale system using a tablet and a portable receipt printer. The printer supports both Bluetooth and NFC. Which connection method should the technician use for reliable, low-latency printing?

A.NFC

B.Bluetooth

C.Infrared

D.Wi-Fi Direct

AnswerB

Bluetooth provides a robust, short-range wireless connection ideal for connecting peripherals like printers to a mobile POS system. It offers sufficient bandwidth for continuous print job data transmission with low latency, ensuring reliable and timely receipt printing. Its low power consumption and ability to operate effectively over several meters make it a practical and widely adopted solution for such setups in retail environments.

Why this answer

Bluetooth is the correct choice because it provides a reliable, low-latency wireless connection specifically designed for peripheral devices like printers. Unlike NFC, which is optimized for very short-range (under 4 cm) tap-to-pair operations and not sustained data streaming, Bluetooth maintains a stable link over distances up to 10 meters and supports the Serial Port Profile (SPP) or Bluetooth Basic Rate/Enhanced Data Rate (BR/EDR) for consistent print job throughput.

Exam trap

The trap here is that candidates often choose NFC because they associate it with 'tap-to-pair' convenience, but they overlook that NFC is a pairing trigger, not a data transport method for sustained printing—Bluetooth handles the actual data transfer after the initial NFC tap.

How to eliminate wrong answers

Option A is wrong because NFC operates at a maximum range of about 4 cm and is intended for quick pairing or contactless payments, not for sustained, low-latency printing; it lacks the bandwidth and connection stability for streaming print data. Option C is wrong because Infrared (IrDA) requires direct line-of-sight and a very short range (typically 1 meter), making it impractical for a mobile point-of-sale scenario where the tablet and printer may be moved or repositioned. Option D is wrong because Wi-Fi Direct, while capable of high throughput, introduces higher latency and connection setup overhead compared to Bluetooth, and it is overkill for the simple data payload of a receipt printer, often consuming more power unnecessarily.

Full explanation →

798

MCQmedium

A technician is setting up a new thermal printer for a retail point-of-sale system. The printer uses direct thermal technology and will print receipts. After connecting the printer via USB and installing the driver, the test page prints, but the text is very faint. What is the most likely cause?

A.The printer driver is incorrect

B.The thermal paper is loaded upside down

C.The printhead darkness setting is too low

D.The USB cable is faulty

AnswerC

Direct thermal printers create images by applying heat to specialized thermal paper. The printhead darkness setting directly controls the amount of heat generated by the printhead elements or the duration of heat application to the paper. If this setting is too low, insufficient heat is transferred to the paper's heat-sensitive coating, causing only a weak chemical reaction and resulting in consistently faint or light text. Increasing this setting would provide more heat, producing darker, more legible output.

Why this answer

Faint output on a direct thermal printer is typically due to insufficient heat from the printhead. The printhead's temperature setting or the media's thermal sensitivity may be mismatched. Adjusting the darkness or heat setting in the driver or printer configuration is the correct fix.

Full explanation →

799

MCQhard

A technician is deploying a new laser printer in a medical office. After installation, the printer prints a test page correctly, but when users print from their workstations, the output is garbled with random characters. What is the most likely cause?

A.The printer's network cable is faulty

B.The printer driver is incorrect or corrupt

C.The printer's memory is full

D.The printer is set to PostScript emulation but the driver uses PCL

AnswerB

The printer driver acts as an interpreter, translating the operating system's print commands and document data into a specific Page Description Language (PDL) that the target printer model understands. If the installed driver is incorrect for the printer model or has become corrupt, it will generate a malformed or incompatible PDL data stream. The printer, unable to properly interpret these instructions, will then print seemingly random symbols, characters, or control codes, resulting in garbled output.

Why this answer

Garbled output with random characters typically indicates a printer driver mismatch or corruption. The test page prints correctly because it uses the printer's internal fonts and settings, bypassing the driver. When printing from workstations, the driver translates the document into a language the printer understands; if the driver is incorrect, the printer misinterprets the data, resulting in garbled text.

Exam trap

The trap is that candidates might choose the network cable or memory issue, but garbled output specifically points to a driver or PDL mismatch, not hardware.

How to eliminate wrong answers

Option A is wrong because a faulty network cable would cause no printing or intermittent connectivity, not garbled output. Option C is wrong because full printer memory would cause errors or incomplete prints, not random characters. Option D is wrong because if the printer is set to PostScript emulation but the driver uses PCL, the output would be garbled, but this is a specific type of driver mismatch; however, the most likely cause is an incorrect or corrupt driver, which encompasses this scenario.

Option D is a plausible but less general cause; the question asks for the most likely cause, and driver issues are more common.

Full explanation →

800

MCQmedium

A customer wants to use a 34-inch ultrawide monitor (3440x1440) with their desktop PC. The PC has an older GPU with a DVI-D dual-link port and an HDMI 1.4 port. Which connection should the technician recommend for the best image quality?

A.DVI-D dual-link

B.HDMI 1.4

C.VGA

D.DisplayPort

AnswerB

HDMI 1.4 is the correct choice because it provides sufficient bandwidth to support the 34-inch ultrawide monitor's native resolution of 3440x1440 pixels. This version of HDMI can reliably transmit video at 3440x1440 resolution at a refresh rate of up to 75 Hz, which comfortably accommodates the monitor's typical 60 Hz refresh rate. Given that other, more capable digital options like DisplayPort are unavailable, HDMI 1.4 stands as the best available and fully compatible solution for optimal image quality.

Why this answer

HDMI 1.4 supports 3440x1440 at up to 75 Hz, which is sufficient for the monitor's typical 60 Hz refresh rate. DVI-D dual-link is limited to 2560x1600 at 60 Hz and cannot deliver the full 3440x1440 resolution. Therefore, HDMI 1.4 provides the best image quality among the available ports.

Exam trap

CompTIA often tests the misconception that DVI-D dual-link is always superior to HDMI for high resolutions, but candidates forget that DVI-D dual-link's maximum resolution is 2560x1600, not 3440x1440.

How to eliminate wrong answers

Option A is wrong because DVI-D dual-link has a maximum pixel clock of 330 MHz, which caps its resolution at 2560x1600 at 60 Hz, making it unable to drive a 3440x1440 ultrawide monitor. Option C is wrong because VGA is an analog interface that maxes out at 2048x1536 at 60 Hz and introduces signal degradation, making it unsuitable for high-resolution digital displays. Option D is wrong because DisplayPort is not available on the PC's older GPU, so it cannot be used as a connection option.

Full explanation →

801

MCQmedium

A user reports that their computer cannot access any network resources, but the link light on the NIC is solid. The technician suspects a faulty cable. Which tool can quickly test the cable's continuity and detect a broken wire?

A.Multimeter

B.Cable tester

C.Toner and probe

D.Crimper

AnswerB

A cable tester injects signals and checks pin-to-pin continuity, revealing breaks or miswiring that a solid link light cannot show. It isolates the physical layer fault quickly, confirming or eliminating the suspected faulty cable before replacing hardware.

Why this answer

A cable tester sends a small electrical signal through each conductor in the cable and checks for a return signal on the correct pin. If a wire is broken, the tester will indicate an open circuit, confirming the fault. This is the fastest and most direct way to verify continuity in a copper Ethernet cable.

Exam trap

The trap here is that candidates confuse a cable tester with a multimeter, thinking a multimeter is sufficient for quick cable continuity checks, but the cable tester is purpose-built for this task and provides a pass/fail result for all eight wires simultaneously.

How to eliminate wrong answers

Option A is wrong because a multimeter can measure continuity but requires manually probing each pin and interpreting resistance values, which is slower and less convenient for testing a full cable with multiple conductors. Option C is wrong because a toner and probe is designed to trace a specific cable within a bundle or locate its endpoints, not to test continuity or detect broken wires. Option D is wrong because a crimper is used to attach connectors to cable ends, not to test the electrical integrity of an already-terminated cable.

Full explanation →

802

Multi-Selecthard

A user with an Android smartphone reports that the device's battery drains unusually fast, even when the screen is off. The technician suspects that one or more apps are keeping the device awake. Which of the following actions should the technician take to identify the cause? (Choose two.)

Select 2 answers

A.Review the list of apps with permission to run in the background.

B.Use a third-party task killer to automatically kill background apps.

C.Perform a factory reset of the device.

D.Disable Bluetooth and GPS to save battery.

E.Check the battery usage statistics in the device settings.

AnswersA, E

Android allows users to restrict background activity for specific apps. Reviewing which apps have permission to run in the background can highlight apps that may be waking the device unnecessarily. The technician can then limit or revoke background permissions for suspicious apps, potentially resolving the battery drain.

Why this answer

To identify an app causing battery drain, the technician should examine battery usage statistics and review background app permissions. These built-in Android features provide data on which apps are consuming power and allow the technician to restrict background activity. Task killers, disabling radios, or factory resets are not diagnostic and may not address the root cause.

Exam trap

The trap here is assuming that a task killer or disabling radios will solve the problem, but the goal is to identify the cause, not apply a generic fix.

Full explanation →

803

MCQhard

A technician is tasked with securing a workstation that will be used in a public kiosk. The requirement is that the system must only boot from the internal SSD and must prevent booting from USB drives or optical media. Which UEFI security feature should be configured?

A.Enable Secure Boot and set a UEFI administrator password.

B.Disable all external boot devices in the UEFI boot order and set a supervisor password.

C.Set the boot mode to Legacy BIOS and disable USB support.

D.Enable the TPM and set a power-on password.

AnswerB

Disabling all external boot devices, such as USB drives, optical drives, or network boot options, directly prevents the workstation from initiating a boot sequence from any unauthorized media. This ensures the system will only attempt to boot from the internal hard drive. Setting a supervisor password then secures the UEFI/BIOS settings, making it impossible for an unauthorized user to re-enable external boot devices or alter the boot order without the correct credentials, thus maintaining the security posture and preventing unauthorized system access.

Why this answer

Disabling all external boot devices in the UEFI boot order and setting a supervisor password ensures the system only boots from the internal SSD and prevents unauthorized changes to boot settings. The supervisor password protects the UEFI configuration from being altered. This directly meets the requirement.

Exam trap

220-1201 often tests the difference between Secure Boot (signature verification) and boot order restrictions (device control), causing candidates to choose Secure Boot when the requirement is to block external boot.

How to eliminate wrong answers

Option A is wrong because Secure Boot only ensures that bootloaders are signed; it does not prevent booting from USB or optical media, and an administrator password alone does not disable external boot devices. Option C is wrong because Legacy BIOS is less secure and disabling USB support does not prevent booting from optical media; also, Legacy BIOS may not support modern security features. Option D is wrong because TPM and power-on password do not control boot device order; TPM is for hardware-based security, not boot restriction.

Full explanation →

804

MCQmedium

During a network upgrade, a technician needs to allow remote desktop connections to Windows workstations from the internal network. Which port must be opened in the firewall?

A.22

B.23

C.3389

D.5900

AnswerC

Port 3389 is the default and well-known port for Microsoft's Remote Desktop Protocol (RDP), which enables users to connect to a graphical interface of another computer over a network connection. For a technician to enable remote desktop access during a network upgrade, ensuring this port is open and accessible through firewalls is crucial for establishing and maintaining RDP sessions to Windows machines.

Why this answer

Remote Desktop Protocol (RDP) uses TCP port 3389 by default. To allow remote desktop connections to Windows workstations from the internal network, the firewall must permit inbound traffic on port 3389. This is the standard port for RDP, which provides graphical remote access to Windows systems.

Exam trap

CompTIA often tests the distinction between common remote access protocols: SSH (port 22), Telnet (port 23), RDP (port 3389), and VNC (port 5900), and the trap here is confusing RDP with VNC or SSH because all provide remote access, but only RDP is native to Windows for graphical remote desktop.

How to eliminate wrong answers

Option A is wrong because port 22 is used for SSH (Secure Shell), which provides encrypted command-line remote access, not graphical remote desktop connections. Option B is wrong because port 23 is used for Telnet, an unencrypted command-line protocol that is insecure and not used for Windows remote desktop. Option D is wrong because port 5900 is used by VNC (Virtual Network Computing), a different remote desktop protocol that is not native to Windows and is not the default for Windows Remote Desktop.

Full explanation →

805

MCQeasy

A customer wants to set up a home network that supports the fastest possible speeds for streaming 4K video and gaming, with support for multiple devices. They have a cable modem that supports up to 1 Gbps. Which wireless standard should you recommend for the new router?

A.802.11ac (Wi-Fi 5)

B.802.11n (Wi-Fi 4)

C.802.11ax (Wi-Fi 6)

D.802.11g (Wi-Fi 3)

AnswerC

As the latest widely adopted standard, 802.11ax (Wi-Fi 6) offers superior performance by operating across both the 2.4 GHz and 5 GHz bands, significantly enhancing network efficiency and capacity. It introduces key technologies like OFDMA and improved MU-MIMO, allowing the router to communicate with multiple devices simultaneously and optimize spectrum usage. This results in higher real-world speeds, reduced latency, and better handling of numerous concurrent high-bandwidth activities such as multiple 4K streams and competitive online gaming, while also being fully backward compatible.

Why this answer

802.11ax (Wi-Fi 6) is the correct recommendation because it offers the highest theoretical data rates (up to 9.6 Gbps aggregate), improved efficiency in dense environments via OFDMA and MU-MIMO, and lower latency, all of which are critical for streaming 4K video and gaming on multiple devices. It also provides backward compatibility with older Wi-Fi standards while maximizing throughput over the existing 1 Gbps cable modem connection.

Exam trap

A common trap is assuming that 802.11ac (Wi-Fi 5) is the fastest standard available for home networks, but 802.11ax (Wi-Fi 6) offers higher throughput and better multi-device performance, making it the correct choice for 4K streaming and gaming.

How to eliminate wrong answers

Option A is wrong because 802.11ac (Wi-Fi 5) operates only on the 5 GHz band and lacks OFDMA and Target Wake Time, making it less efficient for multiple simultaneous high-bandwidth streams compared to Wi-Fi 6. Option B is wrong because 802.11n (Wi-Fi 4) is limited to a maximum theoretical speed of 600 Mbps and uses only 40 MHz channels, which is insufficient for multiple 4K streams and modern gaming demands. Option D is wrong because 802.11g (Wi-Fi 3) is a legacy 2.4 GHz-only standard with a maximum data rate of 54 Mbps, far too slow for 4K video or online gaming.

Full explanation →

806

MCQeasy

A user reports that their smartphone's battery drains very quickly, even when the phone is idle. The phone is less than a year old. Which of the following is the most likely cause of this issue?

A.The battery is defective and needs replacement

B.The screen brightness is set too high

C.An app is running in the background and consuming power

D.The phone is infected with a virus

AnswerC

Many applications are designed to run background processes, such as syncing data, fetching notifications, or utilizing location services, even when the user is not actively interacting with them. A poorly optimized or buggy application can get stuck in a loop, constantly requesting CPU cycles, network access, or GPS, leading to substantial power consumption. This continuous background activity can rapidly deplete the battery, even if the phone appears idle.

Why this answer

When a smartphone battery drains quickly even when idle, the most likely cause is a background app consuming power. Many apps continue running processes, syncing data, or using location services even when the screen is off. This is a common issue that can be diagnosed by checking battery usage statistics.

A defective battery is less likely in a phone less than a year old, and high screen brightness only affects battery when the screen is on. Viruses are rare on smartphones and typically cause other symptoms.

Exam trap

220-1201 often tests the tendency to blame hardware (battery) or malware for battery drain, but the exam expects candidates to first consider software causes like background apps, which are more common and easily resolved.

How to eliminate wrong answers

Option A is wrong because a defective battery in a phone less than a year old is uncommon; battery degradation typically occurs over longer periods or due to manufacturing defects, but background app usage is a more frequent cause of rapid idle drain. Option B is wrong because screen brightness only impacts battery when the screen is on; the issue occurs even when idle, so brightness is not the primary factor. Option D is wrong because smartphone viruses are relatively rare and usually manifest with other symptoms like pop-ups, data usage spikes, or performance issues, not just idle battery drain.

Full explanation →

807

MCQmedium

A law office wants to enable secure printing on their multifunction device so that users must enter a PIN at the printer before their documents print. The printer supports this feature. What must be configured to make this work?

A.Enable SNMP on the printer.

B.Configure user authentication and PIN codes in the printer's settings.

C.Install a print server on the network.

D.Update the printer driver to the latest version.

AnswerB

Configuring user authentication and PIN codes directly within the printer's settings is the primary method for enabling secure printing. This feature requires users to send a print job to the printer, which then holds it in a secure queue until the user physically arrives at the device and enters their unique PIN or credentials to release the job. This ensures that sensitive documents are not left unattended in the output tray, significantly enhancing confidentiality and security.

Why this answer

Secure printing requires user authentication at the device. The printer must have user accounts or a PIN code system configured, and users must select 'Secure Print' or 'Hold Print' from the driver. The printer then releases the job only after the correct PIN is entered.

Full explanation →

808

MCQeasy

A small business uses a router with a default IP of 192.168.1.1. The owner wants to set up a new printer with a static IP of 192.168.1.50. After configuring the printer, it cannot be accessed from any computer on the network. All computers are set to obtain IP addresses automatically. What is the most likely problem?

A.The printer's subnet mask is set to 255.0.0.0.

B.The printer's IP address is outside the router's DHCP range.

C.The printer's IP address conflicts with an address already assigned by DHCP.

D.The printer is not connected to the network via an Ethernet cable.

AnswerC

When a device, such as a printer, is manually configured with a static IP address that falls within the router's dynamic Host Configuration Protocol (DHCP) assignment range, a conflict can occur. If the DHCP server subsequently assigns that same IP address to another device on the network, both devices will experience intermittent or complete loss of network connectivity. This duplicate IP address prevents reliable communication with the printer, making it unreachable and is a very common cause of such issues.

Why this answer

The printer's static IP (192.168.1.50) likely falls within the router's default DHCP pool (commonly 192.168.1.2–192.168.1.254 or a subset like 192.168.1.100–199). If the router has already assigned 192.168.1.50 to another device via DHCP, a duplicate IP conflict occurs, causing the printer to be unreachable. The printer may appear to have an IP, but the conflict prevents proper ARP resolution and communication.

Exam trap

The trap here is that candidates may not realize the risk of setting a static IP address within the router's DHCP range, which can lead to IP conflicts when the DHCP server assigns the same address to another device. Best practice is to assign static IPs outside the DHCP pool.

How to eliminate wrong answers

Option A is wrong because a subnet mask of 255.0.0.0 would place the printer in a different logical subnet (0.0.0.0/8) than the router's 192.168.1.0/24 network, making it unreachable, but this is less likely than a DHCP conflict given the default router configuration. Option B is wrong because the printer's IP (192.168.1.50) is inside the typical DHCP range (e.g., 192.168.1.2–192.168.1.254) for a 192.168.1.1 router, so being outside the DHCP range is not the issue. Option D is wrong because if the printer were not connected via Ethernet, it would not receive any IP configuration or be visible on the network at all, but the question states the printer was configured with a static IP, implying a physical connection exists.

Full explanation →

809

MCQhard

A technician is troubleshooting a smartwatch that will not sync with a smartphone via Bluetooth. The smartwatch pairs but data syncs only intermittently. The smartphone is an Android device with battery optimization enabled for the companion app. What is the most likely cause?

A.The smartwatch firmware is outdated.

B.The Bluetooth radio is experiencing interference from other devices.

C.The smartphone's battery optimization is preventing the companion app from running in the background.

D.The smartwatch's battery is low.

AnswerC

Modern smartphone operating systems employ aggressive battery optimization techniques to extend device uptime. These features often restrict background app activity, including data synchronization and persistent Bluetooth connections, for apps deemed non-essential or those consuming significant power. When the companion app is prevented from running continuously in the background, it cannot maintain the necessary data link with the smartwatch, leading to intermittent or delayed synchronization until the app is brought to the foreground or the device is actively used.

Why this answer

Battery optimization on Android (Doze mode) restricts background app activity to conserve power. When the companion app is prevented from running in the background, it cannot maintain the persistent Bluetooth connection needed for continuous data sync, even though the initial pairing succeeds. This explains intermittent sync because the app is periodically killed or throttled by the OS.

Exam trap

The 220-1201 exam often tests the distinction between pairing (authentication) and syncing (data transfer), leading candidates to overlook how Android's power management features can interrupt background services while still allowing a paired connection to exist.

How to eliminate wrong answers

Option A is wrong because outdated smartwatch firmware typically causes pairing failures or complete sync failure, not intermittent sync after successful pairing. Option B is wrong because Bluetooth interference from other devices usually causes dropped connections or degraded throughput, not a pattern where sync works intermittently only when the app is in the foreground. Option D is wrong because a low smartwatch battery would typically cause the watch to disconnect entirely or fail to pair, not allow pairing with intermittent data sync.

Full explanation →

810

MCQhard

A network administrator is deploying a new wireless network in a large office building. They need to ensure seamless roaming for users moving between floors. The building has concrete floors and metal studs. Which hardware configuration will best support this requirement?

A.Install multiple thick access points with overlapping channels.

B.Use a single high-power access point in the center of the building.

C.Deploy thin access points connected to a wireless LAN controller.

D.Use mesh access points with wireless backhaul.

AnswerC

Deploying thin access points (APs) managed by a centralized Wireless LAN Controller (WLC) is the optimal solution for large-scale wireless deployments requiring seamless mobility. The WLC intelligently manages all APs, coordinating client roaming between them, performing dynamic channel assignment to minimize interference, and balancing client loads across available APs. This architecture ensures consistent signal quality, robust security policies, and uninterrupted connectivity as users move throughout the building.

Why this answer

Thin access points (APs) are designed to be managed centrally by a Wireless LAN Controller (WLC). The WLC coordinates channel selection, power levels, and client handoffs, enabling seamless roaming across floors. In a building with concrete floors and metal studs, multiple thin APs with controlled overlap ensure consistent coverage and fast roaming without the interference issues that would plague overlapping channels on thick APs.

Exam trap

The trap here is the misconception that 'more power equals better coverage' (Option B) or that 'mesh is always the easiest solution' (Option D). In reality, for seamless roaming in a dense, multi-floor environment with signal-blocking materials like concrete and metal, thin APs managed by a central controller are necessary to coordinate handoffs.

How to eliminate wrong answers

Option A is wrong because installing multiple thick (autonomous) APs with overlapping channels would cause co-channel interference and degrade performance; thick APs lack centralized coordination for seamless roaming. Option B is wrong because a single high-power AP cannot penetrate concrete floors and metal studs effectively, leading to dead zones and no roaming support. Option D is wrong because mesh APs with wireless backhaul introduce latency and throughput loss on the backhaul link, and they do not provide the fast, controller-based roaming required for seamless mobility across floors.

Full explanation →

811

MCQeasy

A user reports that their cloud storage files are not syncing to their laptop. The internet connection is working, and other cloud services are accessible. Which of the following is the most likely cause?

A.The cloud storage server is down for maintenance

B.The user's account has been suspended

C.The cloud sync client application is not running

D.A firewall is blocking the sync port

AnswerC

The cloud sync client application is crucial for maintaining real-time synchronization between local files and the cloud storage. If this application is not actively running in the background on the user's device, it cannot monitor local folders for changes, upload new or modified files, or download updates from the cloud. Consequently, the cloud view of the user's files would become outdated or incomplete, even if the device has an active internet connection.

Why this answer

If the internet works and other cloud services are accessible, the most likely cause is that the cloud sync client application is not running, so files are not being uploaded or downloaded. Starting or restarting the sync client is the first logical check.

Exam trap

220-1201 often tests whether candidates jump to server-side or network causes when the simplest local explanation (sync client not running) fits all the given evidence — always eliminate causes contradicted by the scenario.

How to eliminate wrong answers

Option A is wrong because a provider-wide outage would typically affect many users and is less likely than a local client issue, and the scenario gives no evidence of a service-wide failure. Option B is wrong because a suspended account would usually prevent sign-in and produce authentication errors, and other cloud services being accessible suggests the account is active. Option D is wrong because a firewall blocking the sync port would typically also affect other cloud services or produce consistent connection errors, and the scenario states other cloud services work.

Full explanation →

812

MCQmedium

A company deploys a new VoIP phone system. Users report that calls are choppy and sometimes drop. The network uses a single flat subnet with no QoS. What is the most likely cause?

A.The VoIP phones have incorrect DNS settings.

B.The switch ports are set to half-duplex.

C.There is no Quality of Service (QoS) configured.

D.The Ethernet cables are Cat5 instead of Cat6.

AnswerC

Without Quality of Service (QoS) configured, real-time voice packets are treated with the same priority as all other data traffic on the network. This means voice packets can be delayed or dropped when competing with less time-sensitive data, especially during periods of network congestion. The resulting latency, jitter, and packet loss are precisely what cause the characteristic choppy audio and dropped calls experienced in VoIP systems.

Why this answer

VoIP is real-time and delay-sensitive, so without QoS, voice packets compete equally with bulk data and suffer jitter, latency, and packet loss that manifest as choppy audio and dropped calls. QoS marking (DSCP EF for voice) and priority queuing on switches and routers ensure voice traffic is serviced first. On a flat subnet with no QoS, congestion directly degrades call quality.

Exam trap

The trap is that candidates chase physical-layer causes (cabling, duplex) or DNS, but the scenario explicitly states 'no QoS' — the exam expects you to connect real-time voice sensitivity to the absence of prioritization.

How to eliminate wrong answers

Option A is wrong because incorrect DNS would prevent phones from resolving the SIP registrar or provisioning server, causing registration failures — not choppy audio on established calls. Option B is wrong because half-duplex would cause collisions and severe throughput loss affecting all traffic, and modern switched networks auto-negotiate full duplex; it is not the most likely cause given the stated absence of QoS. Option D is wrong because Cat5 supports 100 Mbps and even 1 Gbps at short distances, which is more than sufficient for a single VoIP stream (~100 kbps with G.711); cable category is not the bottleneck here.

Full explanation →

813

MCQmedium

A user reports that their computer will not boot and the motherboard's diagnostic LEDs show a CPU error. You reseat the CPU and check for bent pins, but the error persists. Which of the following should you check next?

A.The RAM modules are in the correct slots

B.The motherboard's BIOS is corrupted

C.The CPU power cable is not fully connected

D.The CPU cooler is installed incorrectly

AnswerC

The CPU requires a dedicated power connection, typically an 8-pin (or 4+4 pin) EPS connector, separate from the main 24-pin ATX power connector. If this CPU power cable is loose, partially connected, or completely disconnected, the CPU will not receive the necessary voltage to operate. Motherboards are designed to detect this lack of power to the processor and will illuminate the CPU diagnostic LED, indicating a critical power delivery failure to the central processing unit, thus preventing any boot sequence.

Why this answer

A CPU error LED that persists after reseating the CPU and checking for bent pins strongly suggests the CPU is not receiving power. The 4-pin or 8-pin EPS/ATX12V CPU power connector on the motherboard must be firmly seated; if it is loose or missing, the CPU will not initialize and the board will flag a CPU fault. This is a common oversight during builds or after moving a system.

Exam trap

220-1201 often tests the assumption that a CPU error LED always means a faulty or misseated CPU, when in fact power delivery (the EPS/ATX12V connector) is the more common culprit and should be verified first.

How to eliminate wrong answers

Option A is wrong because incorrect RAM slot population typically triggers a DRAM diagnostic LED or a memory training failure, not a CPU error LED. Option B is wrong because a corrupted BIOS usually produces a checksum error, POST beep code, or fails to POST at all without specifically flagging the CPU; BIOS corruption would not be the first thing to check after a CPU-specific LED. Option D is wrong because an improperly installed CPU cooler causes thermal throttling or shutdown under load, not an immediate CPU error at power-on; the system would still POST briefly before overheating.

Full explanation →

814

MCQeasy

A technician is troubleshooting a desktop that fails to boot. The system powers on, but no video appears and the motherboard emits a repeating beep pattern. The technician suspects a RAM issue. Which of the following should the technician do FIRST to resolve the problem?

A.Replace the CMOS battery.

B.Reseat the memory modules in their slots.

C.Update the BIOS to the latest version.

D.Replace the power supply with a higher-wattage unit.

AnswerB

Reseating the memory modules is the first step because beep codes often indicate poor contact between the RAM and the slot. Dust or slight movement can cause this. Reseating is quick, safe, and non-destructive, and it frequently resolves the issue without needing replacement parts. It also confirms whether the problem is physical connectivity before moving to more complex diagnostics.

Why this answer

Beep codes during POST often indicate a memory problem. The first and simplest step is to reseat the RAM modules, which re-establishes proper contact and can resolve the issue without parts replacement. This approach is non-invasive and aligns with standard troubleshooting methodology: start with the easiest and most likely solution before escalating.

Exam trap

The trap here is assuming that any boot failure requires replacing hardware, when often a simple reseat of components resolves the issue.

Full explanation →

815

MCQmedium

A technician is troubleshooting a workstation that can access local network resources but cannot reach any websites on the internet. The technician runs ipconfig and sees the IP address, subnet mask, and default gateway are correct. Which of the following should the technician check NEXT?

A.The physical cable connection to the wall jack.

B.The DHCP lease expiration time.

C.The DNS server settings.

D.The MAC address of the NIC.

AnswerC

If the workstation can reach local resources but not internet websites, the issue is likely name resolution. The IP configuration is correct, so the next step is to verify DNS server settings. Incorrect DNS would prevent resolving domain names to IP addresses, causing web access to fail while local resources (accessed by IP or local name) still work.

Why this answer

When local resources are accessible but internet websites are not, and IP configuration is correct, the most likely cause is DNS resolution failure. The technician should verify the DNS server settings. Other options are either irrelevant or would cause broader connectivity loss.

Exam trap

The trap here is assuming a physical or IP configuration problem when the symptom of local access but no internet access strongly points to DNS or default gateway issues; since the gateway is correct, DNS is the next logical check.

Full explanation →

816

MCQmedium

A technician is configuring a new workstation and needs to ensure the system can address more than 4 GB of RAM. The motherboard supports 16 GB of DDR4 memory. Which UEFI setting must be verified to ensure the OS can use all installed memory?

A.Enable the 'Memory Remap' feature in the UEFI.

B.Set the boot mode to Legacy BIOS instead of UEFI.

C.Disable the integrated graphics in the UEFI.

D.Change the SATA mode from AHCI to RAID.

AnswerA

Enabling 'Memory Remap' in the UEFI is crucial for systems with more than 4GB of RAM, especially when running a 64-bit operating system. This feature reconfigures the system's memory address space, allowing the CPU to access all physical RAM installed beyond the traditional 4GB boundary. Without memory remapping, the operating system would only recognize and utilize a fraction of the total installed memory, leading to underutilization of resources.

Why this answer

To address more than 4 GB of RAM on a 64-bit system, the UEFI must have Memory Remap (also called Memory Hole Remapping or Above 4G Decoding) enabled. This feature remaps PCI memory holes above the 4 GB boundary so the operating system can access the full physical memory. Without it, a portion of RAM is shadowed by device memory and becomes unusable.

Exam trap

220-1201 often tests the misconception that simply installing a 64-bit OS is enough to use more than 4 GB — candidates forget that firmware-level Memory Remap must also be enabled to relocate MMIO-shadowed RAM.

How to eliminate wrong answers

Option B is wrong because setting the boot mode to Legacy BIOS instead of UEFI does not affect memory addressing; in fact, UEFI is generally required for modern large-memory configurations and features like Secure Boot. Option C is wrong because disabling integrated graphics frees up some shared memory but does not address the 4 GB limit caused by memory-mapped I/O; it is unrelated to the memory remap function. Option D is wrong because changing SATA mode from AHCI to RAID affects storage controller operation, not memory addressing or the 4 GB barrier.

Full explanation →

817

MCQhard

A user's workstation has intermittent connectivity issues. You suspect the Ethernet cable might be damaged or improperly terminated. You need to test the cable for continuity, shorts, and correct pinout. Which tool should you use, and what is a key feature of this tool?

A.Cable tester; it can detect split pairs

B.Toner probe; it can measure signal strength

C.Multimeter; it can measure resistance

D.Loopback plug; it can simulate network traffic

AnswerA

A cable tester is the appropriate tool because it performs continuity tests on each individual wire within the cable and verifies the correct pinout sequence according to established wiring standards like T568A or T568B. It specifically identifies split pairs, which occur when two wires that should be part of a twisted pair are instead used in different pairs, leading to increased crosstalk, signal degradation, and the intermittent connectivity issues described. This diagnostic capability is crucial for accurately troubleshooting physical layer network problems.

Why this answer

A cable tester is the correct tool because it verifies continuity, detects shorts, and confirms the correct pinout (e.g., T568A/B) of an Ethernet cable. A key feature is its ability to detect split pairs, which can cause crosstalk and intermittent connectivity even if continuity appears fine, as the pairs are not properly twisted.

Exam trap

CompTIA often tests the distinction between a cable tester and a multimeter, trapping candidates who think a multimeter can fully validate Ethernet cabling because it can measure continuity, but it cannot detect split pairs or verify pinout compliance.

How to eliminate wrong answers

Option B is wrong because a toner probe is used to trace and identify cables within a bundle or at a patch panel, not to test for continuity, shorts, or pinout errors; it does not measure signal strength in the context of cable integrity. Option C is wrong because a multimeter can measure resistance and check for opens or shorts, but it cannot verify correct pinout or detect split pairs, which are critical for Ethernet performance. Option D is wrong because a loopback plug is used to test network interface functionality by sending transmitted data back to the receiver, not to test cable wiring or detect physical faults like shorts or miswiring.

Full explanation →

818

MCQeasy

A small office manager wants to upgrade the RAM in several identical workstations from 8 GB to 16 GB. The current modules are DDR3-1600. The company has a box of unused DDR3-1333 modules from an older system. Can they use these modules to upgrade the workstations?

A.No, because the speeds are different and will cause system instability.

B.Yes, but only if they replace the existing modules entirely with the DDR3-1333 modules.

C.No, because DDR3-1333 is not compatible with DDR3-1600 slots.

D.Yes, they can add the DDR3-1333 modules, but all RAM will run at 1333 MHz.

AnswerD

This option is correct because modern memory controllers are designed to accommodate RAM modules with different clock speeds within the same DDR generation. When modules of varying speeds are installed, the memory controller will default to the speed of the slowest module to ensure synchronous operation and system stability. Consequently, all RAM, including the existing DDR3-1600, will operate at 1333 MHz.

Why this answer

DDR3 modules of different speeds are electrically compatible as long as they are the same DDR generation (DDR3) and fit the same slot. When mixed, the memory subsystem runs at the speed of the slowest module — here 1333 MHz — so the workstations will work but at reduced bandwidth. The manager can add the DDR3-1333 modules alongside the existing DDR3-1600 modules.

Exam trap

220-1201 often tests whether candidates know that mixed-speed RAM works but downclocks, confusing 'incompatible' with 'slower'.

How to eliminate wrong answers

Option A is wrong because mixing DDR3 speeds does not inherently cause instability; the system simply downclocks to the slowest module's speed. Option B is wrong because there is no requirement to remove the existing DDR3-1600 modules — mixing is supported. Option C is wrong because DDR3-1333 and DDR3-1600 use the same 240-pin DIMM slot and voltage (1.5V standard), so they are slot-compatible.

Full explanation →

819

MCQhard

A user reports that their laptop's battery life has dropped significantly over the past month. The battery now lasts only 30 minutes on a full charge. The technician runs a battery report and finds that the design capacity is 50,000 mWh, but the full charge capacity is only 12,000 mWh. What is the most likely conclusion?

A.The battery calibration is off and needs to be recalibrated by fully discharging and recharging.

B.A background process is consuming excessive power, draining the battery quickly.

C.The battery has reached the end of its useful life and needs to be replaced.

D.The laptop's power adapter is not providing enough voltage to charge the battery fully.

AnswerC

A full charge capacity of 12,000 mWh versus a design capacity of 50,000 mWh means the battery has lost over 75% of its capacity. This is a clear sign of battery wear and requires replacement.

Why this answer

Full charge capacity (12,000 mWh) is only 24% of design capacity (50,000 mWh), indicating severe battery wear. Lithium-ion batteries lose capacity over charge cycles, and a drop this large means the battery has reached end of life and should be replaced.

Exam trap

220-1201 often tests whether candidates can distinguish battery wear (low FCC vs. design capacity) from calibration or power-draw issues — the numeric ratio is the giveaway.

How to eliminate wrong answers

Option A is wrong because calibration issues cause inaccurate percentage reporting, not a 76% loss of full charge capacity. Option B is wrong because background processes affect runtime, not the measured full charge capacity reported by the battery firmware. Option D is wrong because an underpowered adapter would prevent charging or slow it, but would not reduce the battery's measured full charge capacity.

Full explanation →

820

MCQeasy

A customer reports that their desktop PC will not power on at all. The power supply fan does not spin, and no LEDs are lit. You have verified the power cord is good and the outlet has power. Which motherboard component should you check first?

A.The CMOS battery

B.The front panel power switch header

C.The 24-pin ATX power connector

D.The CPU fan header

AnswerC

The 24-pin ATX power connector is the primary and most critical connection from the Power Supply Unit (PSU) to the motherboard, supplying all essential voltage rails (+3.3V, +5V, +12V, etc.) required for the motherboard and its integrated components to function. If this crucial connector is loose or completely disconnected, the motherboard will not receive any operational power, preventing it from initiating the boot sequence or even drawing sufficient standby power. Consequently, the PSU fan, which typically spins when the PSU is actively delivering power or during initial self-tests, would remain inactive, clearly indicating a fundamental power delivery failure.

Why this answer

When a PC shows no signs of power at all — no fan spin, no LEDs — the first thing to verify is that the motherboard is actually receiving power from the PSU. The 24-pin ATX connector is the primary power feed to the motherboard, and if it is loose, unseated, or the PSU is not delivering voltage on the correct rails, the system will appear completely dead. Checking it (reseating, testing with a PSU tester or multimeter) is the logical first step.

Exam trap

The trap is jumping to the front panel power switch or CMOS battery because they are 'power-related,' when the correct first check for a completely dead system is the primary power path: the 24-pin ATX connector and PSU output.

How to eliminate wrong answers

Option A is wrong because a dead CMOS battery causes loss of BIOS settings and clock drift, not a total failure to power on. Option B is wrong because a faulty front panel power switch header would prevent the power button from signaling the motherboard, but you would typically still see standby LEDs on the motherboard; it is a secondary check after confirming the 24-pin and PSU. Option D is wrong because the CPU fan header only affects CPU cooling and fan operation, not whether the system powers on at all.

Full explanation →

821

MCQhard

A technician needs to install a CPU that supports both DDR4 and DDR5 memory on a new motherboard. The motherboard manual lists support for only DDR5. Which of the following is the best course of action?

A.Install DDR4 RAM because the CPU supports it

B.Install DDR5 RAM as the motherboard supports it

C.Update the BIOS to enable DDR4 support

D.Use a different CPU that only supports DDR5

AnswerB

The motherboard's memory slots are specifically engineered for a particular RAM generation, such as DDR5, dictating the physical form factor, pin configuration, and electrical signaling. Since the motherboard explicitly supports DDR5, and the CPU is also compatible with DDR5, installing DDR5 RAM ensures proper system operation. The CPU's broader compatibility with other memory types becomes irrelevant when the motherboard itself has a singular, defined memory standard.

Why this answer

The motherboard determines the memory type, not the CPU. Even if the CPU's integrated memory controller supports both DDR4 and DDR5, the motherboard's physical DIMM slots and electrical design are keyed for only one type. Since the manual specifies DDR5 support only, DDR5 RAM is the only compatible choice.

Installing DDR4 would be physically impossible or electrically incompatible.

Exam trap

220-1201 often tests the misconception that CPU memory support alone determines RAM compatibility, when in fact the motherboard's physical slots and chipset are the deciding factors.

How to eliminate wrong answers

Option A is wrong because CPU support for DDR4 does not override the motherboard's memory slot design; the motherboard only has DDR5 slots, so DDR4 modules cannot be inserted. Option C is wrong because BIOS updates cannot change the physical memory slots or the motherboard's memory trace routing; DDR4 and DDR5 are electrically incompatible. Option D is wrong because the CPU is not the limiting factor—the motherboard is—so swapping to a CPU that only supports DDR5 would not solve the mismatch and would likely reduce compatibility.

Full explanation →

822

MCQeasy

A user's laptop screen flickers intermittently, but the external monitor works fine. What is the most likely cause?

A.The graphics driver is outdated.

B.The LCD panel is failing.

C.The inverter or backlight is failing.

D.The display cable connecting the motherboard to the screen is loose or damaged.

AnswerD

The display cable, often an eDP (embedded DisplayPort) or LVDS (Low-Voltage Differential Signaling) cable, transmits video data and power specifically to the laptop's internal LCD panel. If this cable is loose at either the motherboard or screen connection, or if it's physically damaged (e.g., pinched in the hinge), it can cause intermittent signal loss, resulting in flickering, distortion, or temporary blackouts on the internal screen while the external display, using a separate video output, remains unaffected.

Why this answer

The most likely cause is a loose or damaged display cable because the external monitor works fine, which rules out a GPU or driver issue. The display cable carries video signals from the motherboard to the LCD panel; intermittent flickering on the internal screen only indicates a physical connection problem at the hinge or connector. This is a common failure point in laptops due to repeated opening and closing.

Exam trap

CompTIA often tests the distinction between backlight failures (which cause dim/no light) and signal failures (which cause flickering or no image), leading candidates to confuse inverter/backlight issues with display cable problems.

How to eliminate wrong answers

Option A is wrong because an outdated graphics driver would affect both the internal display and an external monitor, not just the laptop screen. Option B is wrong because a failing LCD panel typically causes persistent artifacts, dead pixels, or a completely black screen, not intermittent flickering that comes and goes. Option C is wrong because a failing inverter or backlight would cause the screen to be dim or completely dark, not flicker with visible content; flickering with normal brightness points to a signal issue, not a backlight problem.

Full explanation →

823

MCQmedium

A technician is building a workstation for video editing and needs to configure a RAID array for maximum performance without redundancy. The motherboard supports RAID 0, 1, 5, and 10. Which RAID level should the technician choose?

A.RAID 1

B.RAID 5

C.RAID 0

D.RAID 10

AnswerC

RAID 0, or striping, distributes data across two or more drives without any redundancy. This configuration maximizes read and write performance by allowing multiple drives to work in parallel on different parts of the same file, effectively multiplying the throughput. For video editing, where large files are constantly being read and written, this unparalleled speed is critical for smooth playback, rendering, and scrubbing, making it the optimal choice despite the lack of fault tolerance.

Why this answer

RAID 0 (striping) writes data across multiple disks with no mirroring or parity, delivering the highest read and write performance of the listed levels but providing zero redundancy. Since the requirement is maximum performance without redundancy, RAID 0 is the correct choice. A single disk failure in RAID 0 destroys the entire array, but that trade-off is explicitly acceptable here.

Exam trap

220-1201 often tests whether candidates conflate 'performance' with 'redundancy' — RAID 0 is the only listed level that maximizes performance while explicitly providing no redundancy, so any answer implying fault tolerance is wrong.

How to eliminate wrong answers

Option A is wrong because RAID 1 mirrors data across two disks, providing redundancy (and halving usable capacity) rather than maximum performance without redundancy. Option B is wrong because RAID 5 uses distributed parity, which provides redundancy and incurs parity-write overhead that reduces write performance compared to RAID 0. Option D is wrong because RAID 10 combines mirroring and striping, providing both performance and redundancy — the redundancy requirement contradicts the stated 'without redundancy' condition.

Full explanation →

824

MCQmedium

A technician is tasked with upgrading a desktop computer that has a 500GB SATA SSD and a 2TB SATA HDD. The motherboard has one M.2 slot (PCIe 3.0 x4) and four SATA III ports. The user wants faster boot times and application loading. Which upgrade will provide the most noticeable performance improvement?

A.Replace the 2TB HDD with a 2TB SATA SSD.

B.Install an M.2 NVMe SSD and migrate the OS and applications to it.

C.Add more RAM to the system.

D.Replace the 500GB SATA SSD with a larger SATA SSD.

AnswerB

An M.2 NVMe SSD is much faster than a SATA SSD (up to 3,500 MB/s vs 550 MB/s). Moving the OS and applications to the NVMe drive will dramatically reduce boot times and application loading.

Why this answer

The M.2 slot supports PCIe 3.0 x4 NVMe, which delivers dramatically higher sequential and random IOPS than SATA III (roughly 3,500 MB/s vs 550 MB/s). Migrating the OS and applications to an NVMe SSD directly addresses the stated goals of faster boot times and application loading, since those workloads are dominated by random read latency. This is the single upgrade that most directly improves the metrics the user cares about.

Exam trap

220-1201 often tests the confusion between capacity upgrades and interface upgrades — candidates pick a larger SATA SSD assuming 'bigger is faster' when the real performance gain requires moving to the NVMe/PCIe interface.

How to eliminate wrong answers

Option A is wrong because replacing the HDD with a SATA SSD improves bulk storage performance but does not accelerate boot or application loading, which reside on the existing SATA SSD. Option C is wrong because adding RAM only helps if the system is memory-constrained and swapping; it does not address storage I/O latency, which is the bottleneck for boot and app launch. Option D is wrong because a larger SATA SSD increases capacity but keeps the same SATA III interface ceiling of ~550 MB/s, so boot and load times remain essentially unchanged.

Full explanation →

825

MCQeasy

A user complains that their tablet's battery drains very quickly, even when not in use. The device is one year old and was working normally until last week. Which hardware component is most likely failing?

A.The charging port is loose.

B.The battery has degraded or is failing.

C.The power management IC is faulty.

D.The screen brightness is set too high.

AnswerB

A degraded or failing lithium-ion battery experiences a significant reduction in its overall charge capacity and an increase in internal resistance. This degradation prevents the battery from holding a charge effectively, leading to rapid discharge even when the tablet is in standby mode or not actively being used. Over time, chemical changes within the battery cells diminish their ability to store energy efficiently.

Why this answer

A battery that drains quickly even when the device is idle typically indicates that the battery's internal chemistry has degraded, leading to increased self-discharge and reduced capacity. After one year of use, lithium-ion batteries naturally lose about 20% of their capacity, and a sudden failure can occur due to a defective cell or internal short. This matches the symptom of normal operation followed by rapid drain, as the battery can no longer hold a charge effectively.

Exam trap

The 220-1201 exam often tests the distinction between hardware failure and user-configurable settings, so the trap here is that candidates may confuse a high screen brightness setting (a software/user issue) with a hardware battery failure, even though the symptom occurs when the device is not in use.

How to eliminate wrong answers

Option A is wrong because a loose charging port would cause intermittent charging or failure to charge, not rapid battery drain when the device is not in use. Option C is wrong because a faulty power management IC (PMIC) typically causes symptoms like failure to power on, random shutdowns, or overheating, not a consistent rapid drain during idle. Option D is wrong because screen brightness is a user setting that affects active usage drain, not idle battery drain, and it would not cause a sudden change in battery behavior.

Full explanation →

CompTIA A+ Core 1 220-1201 (220-1201) — Questions 751–825