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

1020 questions total · 14pages · All types, answers revealed

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526

MCQhard

A company uses a custom Android app that stores data locally. After a recent OS update, the app fails to write data to the internal storage, but it can read existing data. The app has all necessary permissions. What is the most likely cause?

A.The internal storage is full and cannot accept new data.

B.The OS update introduced scoped storage restrictions that the app does not support.

C.The app's cache needs to be cleared to free up space.

D.The device's SD card has been removed.

AnswerB

Scoped storage limits direct file access; apps targeting older Android versions may not be able to write without using new APIs.

Why this answer

This question tests advanced knowledge of Android storage changes. Starting with Android 11, scoped storage restrictions limit how apps access shared storage. Even with permissions, apps may need to use specific APIs (like MediaStore or SAF) to write files.

The app likely needs an update to comply with the new storage model.

Full explanation →

527

MCQeasy

A customer reports that their laptop connects to the office Wi-Fi but cannot access the internet. Other devices on the same network work fine. The technician checks the laptop's IP configuration and sees an IP address of 169.254.15.22. What is the most likely cause of this issue?

A.The DNS server is misconfigured.

B.The laptop's network adapter is faulty.

C.The DHCP server is out of available IP addresses.

D.The laptop's DHCP client is failing to obtain an IP address.

AnswerD

The 169.254 address is a self-assigned APIPA address, which occurs when the DHCP client cannot contact the DHCP server. This is the correct diagnosis.

Why this answer

An IP address starting with 169.254 indicates that the device was unable to obtain an IP address from a DHCP server, so it assigned itself an Automatic Private IP Addressing (APIPA) address. This typically means the DHCP server is unreachable or not responding, but since other devices work, the issue is likely with the laptop's DHCP request failing.

Full explanation →

528

MCQeasy

A user reports that their MFP is making a loud grinding noise when printing, and the output pages have vertical streaks. The MFP is a laser printer with a separate toner cartridge and imaging drum. What is the most likely cause?

A.The toner cartridge is low on toner.

B.The fuser unit is failing.

C.The imaging drum is damaged or worn.

D.The paper tray is misaligned.

AnswerC

A damaged drum can cause vertical streaks and grinding as it rotates unevenly, producing the reported symptoms.

Why this answer

Vertical streaks on laser printer output often indicate a damaged or worn imaging drum. The grinding noise suggests a mechanical issue with the drum rotation, which is a common failure point in laser MFPs.

Full explanation →

529

MCQeasy

A customer reports that their new Bluetooth headphones pair with their smartphone but produce no audio during calls. The headphones work fine with other devices. What is the most likely cause?

A.The headphones are out of battery.

B.The smartphone's Bluetooth antenna is damaged.

C.The smartphone does not support the required Bluetooth profile for call audio.

D.The headphones are paired to too many devices simultaneously.

AnswerC

Bluetooth profiles like HFP or HSP are needed for call audio; A2DP only handles music. If the phone lacks these profiles, calls will be silent.

Why this answer

This scenario tests knowledge of Bluetooth profiles. The correct answer is that the smartphone may not support the Hands-Free Profile (HFP) or Headset Profile (HSP) required for call audio, even if the Advanced Audio Distribution Profile (A2DP) works for music. Bluetooth devices rely on specific profiles for different functions.

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530

MCQhard

A client reports that their 5 GHz Wi-Fi connection works fine near the access point but drops out completely when they move to the next room, which has thick concrete walls. The 2.4 GHz band works throughout the house. Which of the following is the BEST solution?

A.Replace the access point with a higher-gain antenna.

B.Install a wireless repeater in the next room.

C.Deploy a mesh Wi-Fi system with nodes in each room.

D.Switch the client to 2.4 GHz only.

AnswerC

Mesh systems use multiple nodes to create a seamless network, overcoming obstacles by placing nodes closer to clients.

Why this answer

5 GHz signals attenuate more through obstacles like concrete. A mesh system with multiple nodes can extend coverage by relaying the signal, overcoming the wall issue.

Full explanation →

531

MCQeasy

A client wants to upgrade their workstation with a high-end GPU that requires two 8-pin PCIe power connectors. Their current power supply has only one 6+2 pin PCIe cable. What is the best solution to safely power the new GPU?

A.Use a Molex-to-PCIe adapter to create a second 8-pin connector

B.Install a new power supply that has two 8-pin PCIe cables

C.Connect the GPU using only the 6+2 pin cable and leave the second connector empty

D.Use a Y-splitter on the existing 6+2 pin cable to create two 8-pin connectors

AnswerB

A new PSU with dedicated PCIe cables ensures adequate power delivery and safety, meeting the GPU's requirements without adapters.

Why this answer

Using a modular power supply with the correct cables is safest because it ensures proper gauge and pinout. Adapters can be risky if they exceed the power supply's capacity or cable rating. Replacing the PSU is the most reliable solution for high-power GPUs.

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532

MCQmedium

A user's iPhone connects to a public Wi-Fi hotspot but cannot load any web pages. The Wi-Fi icon shows full signal. Other devices on the same network work fine. What is the most likely issue?

A.The iPhone's DNS settings are misconfigured.

B.The iPhone is not accepting the captive portal's terms and conditions.

C.The iPhone's Wi-Fi antenna is faulty.

D.The public Wi-Fi network is using an incompatible security protocol.

AnswerB

Many public Wi-Fi networks require accepting terms via a web page; if the portal doesn't load or the user hasn't accepted, internet access is blocked.

Why this answer

Public Wi-Fi often uses a captive portal that requires web authentication. If the portal page does not automatically appear, the user may need to open Safari or go to a non-HTTPS site to trigger it.

Full explanation →

533

MCQmedium

A small business uses an MFP that also functions as a network scanner. Users can scan to a shared folder on a Windows PC, but some users get an 'Access Denied' error when scanning. Other users can scan successfully. What is the most likely cause?

A.The network switch port is faulty.

B.The MFP's firmware is outdated.

C.The MFP's scan-to-folder credentials do not have write permissions to the shared folder.

D.The Windows firewall is blocking the MFP.

AnswerC

If the MFP's service account lacks write permissions, it will get an access denied error. Other users may be using different credentials or methods.

Why this answer

Scan to folder requires the MFP to have write permissions to the shared folder. If the MFP uses a generic service account, that account must have appropriate NTFS and share permissions. The issue is likely permission-related for the MFP's credentials.

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534

MCQhard

A user complains that their wireless Bluetooth earbuds frequently disconnect during calls when their smartphone is in their pocket. The earbuds work fine when the phone is on a desk. Which accessory or configuration change is most likely to resolve this issue?

A.A Bluetooth signal booster app

B.A Bluetooth neckband style headset

C.A metal phone case

D.A Wi-Fi analyzer to change router channels

AnswerB

Neckband headsets have the Bluetooth receiver near the user's collar, reducing signal blockage from the body.

Why this answer

Bluetooth signal can be blocked by the human body, especially when the phone is in a pocket. Using a Bluetooth neckband or headset with an external antenna can improve signal reception. A Bluetooth signal booster or case may help, but a neckband physically positions the receiver closer to the phone.

Wi-Fi interference is less likely given the scenario.

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535

MCQhard

A technician is replacing a failed motherboard in a desktop PC. The original motherboard had an LGA1151 socket. The replacement motherboard has an LGA1200 socket. The technician attempts to install the original CPU but finds it does not fit. What is the most likely reason?

A.The CPU is incompatible with the new motherboard's chipset

B.The CPU has a different number of pins

C.The power supply connector is different

D.The CPU is an AMD processor

AnswerB

LGA1151 CPUs have 1151 pins, while LGA1200 has 1200; the different pin count and layout prevent physical installation.

Why this answer

LGA sockets are keyed for specific generations of CPUs. LGA1151 is used for 6th/7th/8th/9th gen Intel, while LGA1200 is for 10th/11th gen. The physical pin count and keying are different, so a CPU designed for LGA1151 cannot be inserted into an LGA1200 socket.

The chipset is irrelevant to physical fit, and the power connector is unrelated.

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536

MCQmedium

A user wants to add a second hard drive to their desktop for extra storage, but the computer only has one SATA data cable available. The technician has an extra SATA power cable from the power supply. What is the most practical solution?

A.Use a Y-splitter on the existing SATA data cable to connect both drives.

B.Purchase an additional SATA data cable and use the existing power cable.

C.Connect the second drive using an external USB-to-SATA adapter.

D.Replace the existing hard drive with a larger one.

AnswerB

The technician has an extra power cable, so they only need a SATA data cable to connect the second drive.

Why this answer

This question tests understanding of SATA connectivity requirements. Each SATA drive needs its own data cable, but power can be shared via splitters or by using available power connectors.

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537

MCQmedium

A laptop's touchpad is not working correctly; the cursor jumps erratically. You have already updated the driver and checked for debris. What hardware component should you inspect or replace next?

A.Replace the entire keyboard assembly.

B.Reseat the touchpad ribbon cable on the motherboard.

C.Replace the laptop's LCD screen.

D.Reinstall the operating system.

AnswerB

A loose or partially connected ribbon cable is a common cause of erratic touchpad behavior.

Why this answer

This question tests systematic troubleshooting of input devices. After ruling out software and debris, the next step is to check the touchpad's ribbon cable connection to the motherboard. A loose or damaged cable can cause erratic behavior.

Replacing the touchpad itself is a later step.

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538

MCQmedium

A technician is troubleshooting a display that shows vertical lines across the entire screen. The lines persist when a different video cable is used, and the monitor works fine when connected to another computer. What is the most likely cause?

A.The monitor's panel is defective.

B.The graphics card driver is corrupted.

C.The video cable is damaged.

D.The monitor's refresh rate is set incorrectly.

AnswerB

Corrupted drivers can cause display artifacts like vertical lines. Reinstalling or updating the driver often resolves the issue.

Why this answer

Vertical lines that persist with different cables but disappear on another computer indicate a problem with the graphics card or its driver on the original computer. The monitor is proven good, so the issue is with the video source.

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539

MCQeasy

A technician is building a new workstation for video editing and needs to ensure the power supply can handle dual GPUs and multiple hard drives. Which specification is most critical to check when selecting a PSU?

A.The total wattage rating of the power supply.

B.The number of SATA power connectors.

C.The combined amperage on the +12V rail(s).

D.The physical form factor (ATX, SFX, etc.).

AnswerC

The +12V rail powers the most demanding components; its amperage multiplied by 12 gives the available wattage for those parts. This is the key spec for high-performance builds.

Why this answer

The +12V rail provides power to the CPU, GPUs, and drives; its combined amperage determines how much power can be delivered to these components. For high-power builds, a single +12V rail with high amperage or multiple rails with sufficient combined capacity is essential. Neglecting this can lead to instability or shutdowns under load.

Full explanation →

540

MCQmedium

A user connects a USB-C docking station to their laptop and finds that the external monitor works, but the Ethernet port on the dock does not provide network connectivity. The laptop's built-in Wi-Fi works fine. Which is the most likely cause?

A.The Ethernet cable is faulty

B.The USB-C port on the laptop is damaged

C.The docking station's Ethernet driver is not installed

D.The laptop's Wi-Fi is interfering with Ethernet

AnswerC

Many USB-C docks require specific drivers for Ethernet to function; without them, the network adapter is not recognized.

Why this answer

USB-C docks often require driver installation for Ethernet functionality. If the driver is missing, the network adapter won't be recognized. A faulty cable or disabled port could also cause issues, but driver issues are common.

The monitor working confirms the dock's power and video pass-through are functional.

Full explanation →

541

MCQmedium

A small office has a multifunction device that prints, scans, and faxes. Users report that incoming faxes are not being received, but outgoing faxes work. The MFP is connected to a VoIP phone system. What is the most likely issue?

A.The fax line is plugged into the wrong port on the MFP.

B.The MFP's fax memory is full.

C.The VoIP system is not configured for T.38 fax protocol.

D.The MFP's firmware is outdated.

AnswerC

Without T.38, VoIP compression can corrupt fax tones during reception, causing incoming faxes to fail while outgoing faxes may still work.

Why this answer

VoIP systems often use codecs that compress audio, which can interfere with fax tones. The T.38 protocol is designed to transmit faxes over IP networks reliably. Without it, incoming faxes may fail while outgoing faxes might still work if the MFP negotiates differently.

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542

MCQmedium

A user reports that their laptop's battery drains quickly when connected to a USB-C docking station, even when the laptop is plugged into the dock's power delivery port. The dock supports 60W power delivery, but the laptop requires 65W. What is the most likely issue?

A.The laptop's battery is failing

B.The dock's power delivery is insufficient for the laptop

C.The USB-C cable is not rated for power delivery

D.The laptop is running high-performance mode

AnswerB

When the dock provides less power than the laptop needs, the laptop supplements from its battery, leading to gradual discharge.

Why this answer

If the power delivery from the dock is less than the laptop's requirement, the laptop will draw power from both the dock and its battery, causing it to discharge slowly. This is a common issue when using underpowered chargers. A faulty battery or high-performance settings could contribute but are not the primary cause.

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543

MCQmedium

A user complains that their PC is running slowly, especially when opening multiple browser tabs. The system has 4 GB of RAM installed, and the OS is Windows 10 64-bit. Task Manager shows memory usage consistently at 90-95%. Which upgrade would provide the most immediate performance improvement?

A.Upgrade the CPU to a faster model.

B.Add an additional 4 GB of RAM to bring the total to 8 GB.

C.Replace the hard drive with a solid-state drive (SSD).

D.Disable the page file to force the system to use only RAM.

AnswerB

Doubling the RAM will allow more applications to run in memory, reducing reliance on the page file and improving responsiveness.

Why this answer

With 4 GB of RAM, Windows 10 is likely using most of it for the OS and background processes, leaving little for applications. Upgrading to 8 GB or more will significantly reduce paging to the hard drive and improve multitasking. Adding more RAM is the most effective solution for this symptom, as the system is memory-constrained.

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544

MCQmedium

A customer wants to connect two buildings that are 200 meters apart with a high-speed network link. Which cabling solution is most appropriate?

A.Cat6a copper cable

B.Fiber optic cable

C.Coaxial cable

D.Wireless bridge

AnswerB

Fiber supports distances over 200 meters easily, often up to kilometers, and is immune to EMI.

Why this answer

Fiber optic cable can transmit data over long distances without signal loss, making it ideal for inter-building connections. Copper Ethernet is limited to 100 meters. Wireless could work but may be less reliable than fiber.

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545

MCQmedium

A user complains that their laser printer is picking up multiple sheets of paper at once, causing jams. The paper tray is full of standard 20 lb bond paper. Which component is most likely causing this issue?

A.The pickup roller is worn

B.The paper is too thin

C.The separation pad is worn

D.The fuser is overheating

AnswerC

A worn separation pad fails to separate sheets, allowing multiple to feed.

Why this answer

Multiple sheets feeding into the printer is typically due to worn or dirty separation pads, which are designed to separate one sheet from the stack. Over time, these pads lose friction. Cleaning or replacing the separation pad usually fixes the problem.

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546

MCQhard

A technician is troubleshooting a PC that boots to a blue screen with the error 'INACCESSIBLE_BOOT_DEVICE' after a user attempted to clone their HDD to an SSD. The BIOS detects both drives. What is the most likely cause?

A.The SSD is not properly connected to the SATA port.

B.The boot order is set to the HDD instead of the SSD.

C.The SATA controller mode in BIOS is set to IDE, but the SSD requires AHCI.

D.The SSD is not partitioned correctly.

AnswerC

Correct; SSDs typically require AHCI mode for proper operation, and cloning from an IDE-mode HDD can cause this error if the mode is not changed.

Why this answer

The 'INACCESSIBLE_BOOT_DEVICE' error typically indicates that the boot loader cannot access the storage device. After cloning, this often occurs because the boot mode (UEFI vs. Legacy) or SATA controller mode (AHCI vs.

IDE) is mismatched between the old and new drives.

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547

MCQhard

A company's network uses a 10.0.0.0/8 private IP scheme. A remote user connects via VPN and gets an IP of 172.16.0.5. They can access the internet but cannot reach internal servers at 10.1.1.50. What is the most likely cause?

A.The internal server's firewall is blocking the VPN IP range.

B.The VPN client is using split tunneling and no route to 10.0.0.0/8 is defined.

C.The VPN server's DHCP scope is exhausted.

D.The user's DNS server is set to a public DNS like 8.8.8.8.

AnswerB

Correct—split tunneling sends only specific traffic through the VPN; without a route to the internal subnet, traffic goes to the internet instead.

Why this answer

The VPN client receives a different subnet (172.16.0.0) than the internal network (10.0.0.0). This is a routing issue—the VPN client's traffic to the internal network may not be routed correctly, or split tunneling is misconfigured. The most common fix is to ensure the VPN routes include the internal subnet.

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548

MCQeasy

A small business owner wants to set up a network that covers three separate buildings within a 200-meter radius, with no internet access required between them. They need a simple, low-cost solution that can be installed quickly without running cables between buildings. Which network type should be recommended?

A.Wireless Local Area Network (WLAN)

B.Wireless Personal Area Network (WPAN)

C.Metropolitan Area Network (MAN)

D.Wide Area Network (WAN)

AnswerB

A WPAN covers short distances (up to 200 meters) and can connect devices across buildings without cables, making it ideal for this scenario.

Why this answer

A Wireless Personal Area Network (WPAN) is designed for short-range, ad-hoc connections between devices within a limited area, such as between buildings within 200 meters using technologies like Bluetooth or Zigbee. It meets the requirement of low cost and no cabling. A WLAN would require wireless access points and infrastructure, a MAN covers a larger area like a city, and a WAN is for wide-area connectivity typically requiring internet.

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549

MCQeasy

A marketing department wants to access a shared calendar and document editing tools without installing any software on their local machines. Which cloud service model would best meet this requirement?

A.Infrastructure as a Service (IaaS)

B.Platform as a Service (PaaS)

C.Software as a Service (SaaS)

D.Function as a Service (FaaS)

AnswerC

SaaS delivers fully managed applications over the internet, accessed via a web browser, matching the need for calendar and document tools.

Why this answer

This question tests understanding of cloud service models. Software as a Service (SaaS) provides ready-to-use applications over the internet, eliminating the need for local installation. The scenario specifically requires access to calendar and document editing tools, which are typical SaaS offerings.

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550

MCQhard

A graphic designer wants to connect three 4K monitors to a single workstation for a video editing suite. The workstation has a graphics card with one HDMI 2.0 port, one DisplayPort 1.4, and one DVI-D port. The monitors all support HDMI and DisplayPort. Which configuration will allow all three monitors to display at 4K resolution simultaneously?

A.Connect one monitor via HDMI, one via DisplayPort, and one via DVI-D

B.Use a DisplayPort hub to connect all three monitors to the single DisplayPort

C.Connect one monitor via HDMI, one via DisplayPort, and use a DisplayPort-to-HDMI adapter for the third

D.Replace the graphics card with one that has three DisplayPorts

AnswerC

This uses all available ports with adapters, and both HDMI and DisplayPort support 4K, allowing three monitors.

Why this answer

DVI-D does not support 4K at 60Hz; it maxes out at 2560x1600. To run three 4K monitors, the technician must use adapters to convert DisplayPort to HDMI for the third monitor, as HDMI and DisplayPort both support 4K.

Full explanation →

551

MCQhard

A technician is diagnosing a PC that will not power on. The multimeter shows 0V on all pins of the 24-pin connector when the PSU is plugged in and the power switch is on. What is the most likely cause?

A.The motherboard is shorted, preventing the PSU from starting.

B.The power supply is completely dead and needs replacement.

C.The AC power cord is loose or the wall outlet is dead.

D.The front panel power switch is faulty.

AnswerC

No voltage at all indicates no AC input; checking the cord and outlet is the first step in troubleshooting.

Why this answer

If no voltages are present, the PSU is not receiving AC power or its internal circuits are dead. The technician should check the AC outlet, power cord, and PSU switch first before concluding the PSU is faulty.

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552

MCQeasy

A customer reports that their desktop PC, which originally had 8 GB of RAM, is now very slow after they installed a second 8 GB stick. The system boots and shows 16 GB in the BIOS, but the OS only reports 8 GB usable. What is the most likely cause?

A.The new RAM stick is faulty and needs to be replaced.

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

C.The new RAM stick is incompatible with the existing module, causing the system to run in single-channel mode and limiting usable memory.

D.The motherboard only supports up to 8 GB of RAM.

AnswerC

Mismatched RAM modules (different speeds, timings, or ranks) can force the memory controller to operate in a mode where only one channel is fully utilized, leading to the OS seeing only half the installed capacity.

Why this answer

This scenario describes a common issue where mismatched memory modules cause the system to operate in single-channel mode or fail to address all installed RAM. The most likely cause is that the new RAM stick is not compatible with the existing module, often due to differences in speed, timings, or rank, forcing the system to run at the lower common denominator or disabling dual-channel support. The BIOS sees both sticks, but the OS may only report the usable memory from one channel if the modules are mismatched.

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553

MCQeasy

A user reports that their smartphone's screen protector has a large bubble in the center and the edges are lifting. They installed it themselves two days ago. What is the most likely cause of this issue?

A.The screen protector is incompatible with the phone model.

B.The phone's screen has a manufacturing defect.

C.The user did not properly clean the screen before installation.

D.The screen protector is a tempered glass type, which is prone to bubbles.

AnswerC

Dust, oil, or moisture left on the screen prevents the adhesive from bonding evenly, leading to bubbles and lifting edges. This is the most common cause of such issues.

Why this answer

Screen protector bubbles and lifting edges are almost always caused by improper installation, such as not cleaning the screen thoroughly or not aligning the protector correctly. Even high-quality protectors will fail if the surface isn't perfectly clean and dust-free. The correct answer is improper installation.

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554

MCQeasy

A small office uses an inkjet printer that has started leaving horizontal white lines across printed documents. The printhead cleaning cycle has been run twice without improvement. Which step should be taken next?

A.Replace the ink cartridges

B.Perform a manual printhead cleaning using distilled water or a cleaning solution

C.Adjust the print quality settings to 'Best'

D.Replace the printer

AnswerB

Manual cleaning can dislodge stubborn clogs that automated cycles cannot clear, restoring proper ink flow.

Why this answer

Horizontal white lines on inkjet output indicate clogged nozzles in the printhead. If cleaning cycles fail, a more thorough cleaning using a manual method or a printhead soak may be needed. Replacing ink cartridges or the entire printer would be premature, and adjusting print settings does not address the physical clog.

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555

MCQeasy

A company uses a cloud-based customer relationship management (CRM) application. The vendor handles all updates, security patches, and infrastructure maintenance. Which cloud service model does this represent?

A.Infrastructure as a Service (IaaS)

B.Platform as a Service (PaaS)

C.Software as a Service (SaaS)

D.Desktop as a Service (DaaS)

AnswerC

SaaS delivers a complete application managed by the vendor, matching the CRM scenario.

Why this answer

This scenario describes Software as a Service (SaaS), where the provider delivers a complete application over the internet. The user only needs a web browser and does not manage the underlying OS, servers, or updates. IaaS would give virtual machines, PaaS would provide a development platform, and DaaS would deliver virtual desktops.

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556

MCQhard

A technician is troubleshooting a customer's home network where the desktop PC is wired to the router, but the wireless printer intermittently disappears from the network. The printer is connected via Wi-Fi to the same router. After checking, the technician finds that the printer's IP address is in the 169.254.x.x range. Which network type is the printer attempting to use, and what does this indicate?

A.Peer-to-peer network; the printer is sharing directly with the PC.

B.WLAN with DHCP failure; the printer has self-assigned an APIPA address.

C.PAN network; the printer is using Bluetooth.

D.Ad hoc network; the printer is connecting directly to the PC.

AnswerB

The 169.254.x.x address is an APIPA address, meaning the printer's DHCP request failed, so it self-assigned a link-local address.

Why this answer

An IP address in the 169.254.x.x range indicates that the device has failed to obtain an IP from a DHCP server and has assigned itself an Automatic Private IP Addressing (APIPA) address. This is not a separate network type but a fallback mechanism within a LAN/WLAN. The printer is on a WLAN but cannot get a valid IP, causing connectivity loss.

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557

MCQmedium

A user says their monitor suddenly turned off and will not power on. The power LED on the monitor is off. They have checked the power cable and it is securely connected. What should the technician do next?

A.Replace the monitor's internal power supply

B.Test the power outlet with a known-working device

C.Reseat the video cable connecting the monitor to the PC

D.Replace the monitor with a new one

AnswerB

This checks if the outlet is providing power, a common and simple cause.

Why this answer

If the power LED is off and the cable is secure, the next step is to test the power outlet with another device to rule out a dead outlet. This follows a logical troubleshooting process.

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558

MCQmedium

A technician is deploying a wireless network in a large warehouse and needs to ensure seamless roaming for handheld scanners as workers move between access points. Which technology should the technician configure to support this requirement?

A.Enable WPA2-PSK with AES encryption.

B.Set all access points to the same SSID and password.

C.Implement 802.11r Fast Roaming.

D.Use a wireless controller with load balancing.

AnswerC

802.11r reduces authentication time during roaming, ensuring seamless connectivity for mobile devices.

Why this answer

802.11r (Fast Roaming) allows clients to re-authenticate quickly when moving between access points, reducing latency and preventing disconnects during handoffs.

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559

MCQeasy

A small office has a single internet connection and needs to provide wired network access to 20 computers. They also need to allow guests to connect wirelessly but keep the guest traffic separate from the internal network. Which single device can handle both wired switching and wireless access with VLAN support?

A.Managed switch

B.Wireless router

C.Wireless access point

D.Hub

AnswerB

A wireless router combines a switch, router, and wireless access point, and many support VLANs for guest network isolation.

Why this answer

A wireless router or a wireless access point integrated into a switch can provide both wired and wireless connectivity. However, the key requirement is VLAN support to isolate guest traffic. A wireless router with VLAN capabilities can meet all needs, but a standard wireless router without VLAN support cannot separate traffic.

A switch alone provides no wireless, and an access point alone provides no switching. The correct answer is a wireless router with VLAN support, but since that's not an option, a wireless access point connected to a managed switch is the best fit. Actually, the correct device is a wireless router with VLAN capabilities, but in the options, 'Wireless router' is the most common device that can do both.

Given the options, a wireless router is the correct choice as it typically includes a switch and can support VLANs if configured.

Full explanation →

560

MCQmedium

A technician is upgrading a server CPU to improve multi-threaded performance for a virtualization host. The current CPU has 8 cores and 16 threads. Which of the following specifications is most important to consider for compatibility?

A.CPU clock speed

B.CPU core count

C.CPU socket type

D.CPU TDP

AnswerC

The socket type must match the motherboard; otherwise, the CPU cannot be installed at all.

Why this answer

CPU upgrades require careful consideration of socket type, chipset support, and BIOS compatibility. The socket is the most critical physical compatibility factor.

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561

MCQmedium

A technician is replacing a CPU in a server that uses a LGA 1151 socket. After installing the new CPU and applying thermal paste, the system fails to post. The technician notices the CPU cooler is not making full contact with the CPU. What is the most likely consequence of this poor contact?

A.The CPU will operate at a lower clock speed but still function

B.The system will boot but display a warning about high CPU temperature

C.The CPU will overheat and the system will shut down to prevent damage

D.The CPU will be permanently damaged immediately

AnswerC

Without proper cooler contact, the CPU temperature rises rapidly, triggering the thermal shutdown protection before the OS loads.

Why this answer

Poor contact between the CPU and cooler prevents effective heat dissipation. The CPU will quickly overheat, triggering thermal protection that shuts down the system to prevent damage. This is a common issue after improper cooler installation.

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562

MCQmedium

A user reports that their computer cannot connect to the internet after being moved to a new office. The computer receives an IP address starting with 169.254.x.x. Which network service is failing to provide a valid IP configuration?

A.DNS

B.DHCP

C.NAT

D.ARP

AnswerB

DHCP assigns IP addresses. The 169.254.x.x address is an APIPA address, meaning the DHCP server did not respond.

Why this answer

An IP address in the 169.254.x.x range indicates that the computer has assigned itself an Automatic Private IP Address (APIPA) because it did not receive a response from a DHCP server. The DHCP service is failing or unreachable. DNS and NAT are not involved in IP assignment.

Full explanation →

563

MCQmedium

A technician is installing a new M.2 NVMe SSD into a desktop motherboard that has two M.2 slots. After installation, the system boots but the new drive is not detected in the BIOS. What should the technician check first?

A.Update the SSD firmware.

B.Check if the M.2 slot supports NVMe or only SATA.

C.Replace the SSD with a different brand.

D.Disable Secure Boot in the BIOS.

AnswerB

Some M.2 slots are SATA-only; if the technician installed an NVMe drive in such a slot, it will not be detected.

Why this answer

This question tests knowledge of M.2 slot configurations. Some M.2 slots share bandwidth with SATA ports or PCIe lanes, and the motherboard manual specifies which slot supports NVMe.

Full explanation →

564

MCQeasy

A user reports that their new laptop can connect to the office Wi-Fi but cannot access any internet sites. Other devices on the same network work fine. Which tool should be used first to verify the laptop's IP configuration?

A.Ping

B.ipconfig

C.Tracert

D.Netstat

AnswerB

ipconfig shows the current IP settings, allowing you to quickly see if the laptop has a valid address, subnet mask, and default gateway.

Why this answer

The ipconfig command displays the IP address, subnet mask, and default gateway assigned to a network adapter. Since the laptop connects to Wi-Fi but can't reach the internet, checking its IP configuration (e.g., whether it received a valid address via DHCP) is the logical first step.

Full explanation →

565

MCQhard

A technician is servicing a smartphone with a non-functional earpiece speaker during calls, but the loudspeaker works fine. After testing, the earpiece speaker itself is determined to be good. Which component is most likely faulty?

A.The charging port flex cable.

B.The mainboard audio IC (codec).

C.The SIM card slot.

D.The battery connector.

AnswerB

The audio IC controls which speaker receives sound; a fault here can disable the earpiece while leaving the loudspeaker functional.

Why this answer

This question tests understanding of audio routing in mobile devices. The audio IC or codec manages which speaker is used. If the earpiece speaker is good but doesn't work, the audio IC may be damaged, or the connection traces are broken.

The loudspeaker working suggests the audio path for that output is intact.

Full explanation →

566

MCQeasy

A help desk ticket reports that a user's PC fails to boot and emits a series of long beeps. The system has two 8 GB DDR4 modules installed. What is the most likely cause of this issue?

A.The power supply is failing.

B.The CPU is overheating.

C.One of the RAM modules is faulty or not seated properly.

D.The hard drive has failed.

AnswerC

Long beeps are a standard POST code for memory errors, so this is the most likely cause.

Why this answer

Long beeps during POST typically indicate a memory failure, such as a faulty or improperly seated RAM module. This is a common hardware troubleshooting scenario where the beep code points directly to RAM issues. The technician should reseat or replace the RAM modules first.

Full explanation →

567

MCQmedium

A company's web server is accessible from the internet, but users report that they cannot upload files to it using a web browser. The server is configured to allow file uploads via HTTP. Which protocol is most likely being blocked by the firewall?

A.HTTPS

B.FTP

C.HTTP

D.SMTP

AnswerC

HTTP uses port 80 and is commonly used for web uploads; if blocked, uploads fail while the server may still be reachable via HTTPS.

Why this answer

This scenario tests understanding of HTTP vs HTTPS and common firewall rules. HTTP uses port 80 for web traffic, and if uploads are failing while the server is reachable, the issue may be that the firewall is blocking HTTP traffic while allowing HTTPS (port 443) or vice versa.

Full explanation →

568

MCQmedium

A user reports that their inkjet printer makes a loud grinding noise when printing, and the paper feeds crookedly. Which component is most likely failing?

A.The printhead assembly.

B.The paper feed rollers.

C.The ink cartridges.

D.The printer's main logic board.

AnswerB

Worn or dirty feed rollers cause slipping, noise, and skewed paper feeding.

Why this answer

Grinding noise and crooked paper feed indicate a problem with the paper pickup or feed rollers. These rollers may be worn, dirty, or misaligned, causing improper paper handling.

Full explanation →

569

MCQhard

A technician is deploying a new server that requires RAID 10 for data redundancy and performance. The motherboard has an onboard RAID controller. After configuring the RAID array in the UEFI RAID utility, the technician installs the OS, but the RAID volume is not visible in the OS installer. What is the most likely cause?

A.The RAID array was not properly initialized in the UEFI RAID utility.

B.The SATA mode is set to AHCI instead of RAID in the UEFI.

C.The UEFI boot mode is set to Legacy, which does not support RAID.

D.The RAID driver is missing from the OS installation media.

AnswerB, D

For the onboard RAID controller to function, the SATA mode must be set to RAID in the UEFI; AHCI mode treats drives individually, not as an array.

Why this answer

When using a hardware RAID controller, the OS installer needs the appropriate driver to recognize the RAID volume. Without the driver, the installer sees individual drives instead of the array. The technician must load the RAID driver during installation, typically by pressing a key (e.g., F6) or browsing for the driver.

Full explanation →

570

MCQmedium

A technician is troubleshooting a desktop that randomly restarts under heavy load. They suspect the RAM is overheating. What type of RAM cooling solution is most commonly integrated into high-performance memory modules?

A.Liquid cooling loops attached to the RAM sticks.

B.Heat spreaders (metal fins) on the modules.

C.Small fans mounted directly above the RAM slots.

D.Thermal pads that connect RAM to the motherboard heatsink.

AnswerB

Heat spreaders are standard on most performance RAM to passively dissipate heat, helping to prevent thermal throttling or instability.

Why this answer

High-performance RAM modules often come with heat spreaders—metal fins or covers that dissipate heat from the memory chips. These are passive cooling solutions that increase the surface area for heat dissipation. Active cooling (fans) is less common on standard modules and is usually an aftermarket addition.

Full explanation →

571

MCQhard

A network administrator is configuring a small business network with two subnets: 192.168.1.0/24 for employees and 192.168.2.0/24 for guests. The router has two LAN interfaces with IPs 192.168.1.1 and 192.168.2.1. A technician connects a new access point to the guest subnet switch and configures it with a static IP of 192.168.2.50. The access point can ping the router's guest interface but cannot reach the internet. The router's default route points to an ISP modem at 203.0.113.1. What is the most likely missing configuration?

A.The access point's default gateway is set to 192.168.1.1.

B.NAT is not enabled for the 192.168.2.0/24 subnet on the router.

C.The access point has a duplicate IP address.

D.The ISP modem is blocking traffic from the guest subnet.

AnswerB

Without NAT, the router will not translate private IPs from the guest subnet to the public IP, so traffic cannot reach the internet. The employee subnet works because NAT is likely enabled for it.

Why this answer

The access point can reach the router's guest interface, but not the internet. This suggests the router is not performing NAT for the guest subnet, or the router lacks a route back from the ISP modem. Typically, for internet access, the router must have NAT enabled for the guest subnet, and the ISP modem must have a route back to the guest subnet.

Since the employee subnet works, the router likely has NAT for 192.168.1.0/24 but not for 192.168.2.0/24.

Full explanation →

572

MCQeasy

A customer reports that their new VoIP phone cannot register with the company's call server, but their computer on the same switch port works fine. The network uses VLANs for voice and data traffic. Which protocol must be configured on the switch port to separate the voice traffic from the data traffic?

A.DHCP

B.802.1Q

C.DNS

D.ARP

AnswerB

802.1Q is the VLAN tagging protocol used to mark frames for different VLANs, enabling voice and data to share a port.

Why this answer

This question tests knowledge of VLAN tagging protocols used to separate voice and data traffic on a single switch port. IEEE 802.1Q is the standard VLAN tagging protocol that allows multiple VLANs to share the same physical link, which is essential for VoIP deployments where a phone and PC share a port.

Full explanation →

573

MCQmedium

You are deploying 20 identical office PCs. After imaging one system, you clone the drive to the other 19. However, all cloned systems fail to boot with a 'Boot Device Not Found' error. The original system boots fine. What motherboard setting is most likely causing this?

A.Secure Boot is enabled on the clones

B.The SATA mode is set to AHCI on the clones

C.The boot mode is set to Legacy BIOS instead of UEFI

D.The CMOS battery is dead on the clones

AnswerC

If the cloned drive uses UEFI boot, the motherboard must be set to UEFI mode; Legacy mode will not detect the UEFI boot partition.

Why this answer

When cloning a system, the boot mode (UEFI vs. Legacy BIOS) must match the motherboard configuration. If the original was set to UEFI but the clones have Legacy mode enabled (or vice versa), the system won't find the bootloader.

This is a common deployment pitfall.

Full explanation →

574

MCQmedium

A technician is troubleshooting a desktop PC that powers on but shows no display on the monitor. The monitor's power LED is amber (standby). The PC has an integrated GPU and a discrete GPU. Which step should be taken FIRST to isolate the issue?

A.Reseat the RAM modules

B.Check that the monitor cable is plugged into the discrete GPU, not the motherboard

C.Replace the CMOS battery

D.Test the monitor on another computer

AnswerB

If a discrete GPU is installed, the motherboard video ports are often disabled; connecting to the wrong port results in no signal.

Why this answer

An amber LED indicates the monitor is not receiving a signal. The most common oversight is connecting the cable to the wrong video port (motherboard vs. GPU).

The correct first step is to verify the cable is connected to the discrete GPU's ports, as integrated graphics are often disabled when a dedicated card is installed.

Full explanation →

575

MCQhard

A technician upgrades a workstation from Windows 10 to Windows 11, but the installation fails with an error that the system does not support TPM 2.0. The CPU is compatible. What must the technician do in UEFI to resolve this?

A.Enable Secure Boot and set it to Windows UEFI mode

B.Enable the TPM device in UEFI security settings

C.Disable CSM and set boot mode to UEFI only

D.Update the UEFI firmware to the latest version

AnswerB

TPM 2.0 must be enabled and active for Windows 11 installation.

Why this answer

Windows 11 requires TPM 2.0, which may be disabled in UEFI by default. The technician must enable the TPM device in the security settings. This tests knowledge of TPM configuration and its role in system requirements.

Full explanation →

576

MCQhard

A company uses a proxy server for internet access. Users report that they can access internal websites but cannot reach external sites. The proxy server's IP is configured in the browser settings. Which network service is most likely failing?

A.DNS

B.DHCP

C.Proxy server

D.NAT

AnswerC

The proxy server is responsible for forwarding external requests. If it is down or misconfigured, users cannot reach external sites while internal access remains unaffected.

Why this answer

The proxy server acts as an intermediary for external requests. If users can reach internal sites (which bypass the proxy) but not external ones, the proxy server itself or its connection to the internet is failing. DNS and DHCP are likely working since internal access is fine.

Full explanation →

577

MCQhard

A network administrator is troubleshooting a slow connection between two buildings connected by a fiber optic link. The link is up but throughput is lower than expected. Which tool should be used to measure the exact signal loss in the fiber?

A.Multimeter

B.Tone generator

C.OTDR

D.Wi-Fi analyzer

AnswerC

An OTDR is the standard tool for characterizing fiber optic links, measuring loss and locating faults.

Why this answer

An optical time-domain reflectometer (OTDR) sends light pulses into the fiber and measures backscatter to identify loss, splices, bends, and breaks. It provides a detailed profile of the fiber's condition, which is crucial for diagnosing throughput issues.

Full explanation →

578

MCQeasy

A user complains that their external USB hard drive is not recognized when plugged into a Windows 10 workstation. The technician checks Device Manager and sees an unknown device with a yellow exclamation mark. What should the technician do first?

A.Replace the USB cable.

B.Update the driver for the unknown device.

C.Format the external drive.

D.Disable the USB root hub in Device Manager.

AnswerB

Correct. Updating the driver often resolves the unknown device error.

Why this answer

A yellow exclamation mark in Device Manager typically indicates a driver issue. The first logical step is to update or reinstall the driver for the unknown device. This tests basic USB troubleshooting.

Full explanation →

579

MCQhard

A customer calls stating that their Android phone's messaging app is not receiving SMS messages from one specific contact, but all other contacts work. The phone has good signal strength. What is the most likely cause?

A.The phone's SIM card is damaged.

B.The contact's number is blocked in the messaging app.

C.The messaging app has a corrupted database.

D.The carrier is experiencing an outage in the area.

AnswerB

Blocking a contact prevents their messages from being delivered, while other contacts work normally.

Why this answer

This is a nuanced scenario where a single contact fails. The most likely cause is that the contact's number has been blocked in the messaging app or phone settings, which is a common user mistake. Other causes like carrier issues or SIM problems would affect all messages.

Full explanation →

580

MCQmedium

A user's laptop connects to the office Wi-Fi but cannot access the internet. Other devices on the same network work fine. The laptop's IP address is 169.254.25.14. What is the most likely cause?

A.The DNS server is unreachable.

B.The laptop's wireless adapter driver is corrupted.

C.The DHCP server is not responding or the laptop cannot reach it.

D.The SSID is hidden and requires manual entry.

AnswerC

APIPA occurs when DHCP fails; the laptop self-assigns an address in the 169.254.x.x range, indicating no DHCP lease.

Why this answer

A 169.254.x.x address indicates the device failed to obtain an IP from a DHCP server. This is an Automatic Private IP Addressing (APIPA) address, meaning the laptop cannot reach the DHCP server.

Full explanation →

581

MCQmedium

An IT administrator is planning to deploy multiple virtual machines on a single host for a development team. Each developer needs a separate environment with different OS versions. The host has a quad-core CPU with hyper-threading enabled and 32 GB of RAM. The administrator wants to maximize resource utilization while ensuring performance isolation. Which virtualization feature should be configured?

A.Virtual machine snapshots

B.Resource pooling

C.Virtual switch VLAN tagging

D.Virtual machine cloning

AnswerB

Resource pooling lets the hypervisor manage CPU and memory across VMs, providing flexibility and isolation without overcommitting.

Why this answer

Resource pooling allows the hypervisor to dynamically allocate CPU and memory from a shared pool to VMs as needed, balancing load and ensuring isolation. This is ideal for development environments where demand varies.

Full explanation →

582

MCQmedium

During a network upgrade, a technician replaces an old 10/100 Mbps switch with a new gigabit switch. After the change, several users report that their internet connection is slow. The technician checks the switch and sees that some ports show 100 Mbps instead of 1000 Mbps. What is the most likely cause?

A.The switch ports are configured for half-duplex

B.The Ethernet cables are Cat5 instead of Cat5e or Cat6

C.The connected devices have 10/100 Mbps NICs

D.The switch has a faulty power supply causing reduced performance

AnswerC

If the client NIC only supports 100 Mbps, the switch will negotiate to that speed, resulting in slower performance than gigabit.

Why this answer

This question tests understanding of Ethernet speed negotiation. When a device's NIC only supports 100 Mbps, the switch will auto-negotiate down to that speed. The slow speed is due to the client's hardware limitation, not the switch.

Full explanation →

583

MCQeasy

A user complains that their smartphone's screen protector has started peeling off at the edges after a few weeks. They installed it themselves. What is the most likely cause of this problem?

A.The screen protector is of low quality and does not fit the device model.

B.The user did not clean the screen properly before installation, leaving dust or oil.

C.The smartphone case is too tight and pushes the protector off.

D.The device's screen has a factory oleophobic coating that repels the adhesive.

AnswerB

This is correct; improper cleaning leads to poor adhesion, causing edges to lift over time.

Why this answer

Improper installation, such as not cleaning the screen thoroughly or misalignment, is the most common cause of screen protector peeling. Dust or oil under the protector prevents proper adhesion. The correct answer focuses on installation technique.

Full explanation →

584

MCQmedium

A company's internal DNS server is not resolving hostnames for clients. The technician verifies that the DNS service is running and the firewall allows traffic on port 53. However, clients still cannot resolve names. What is the most likely issue?

A.The firewall is blocking UDP port 53

B.The DNS server is using port 5353 instead of 53

C.The firewall is blocking TCP port 53

D.Clients are using the wrong DNS server IP

AnswerC

DNS requires TCP for zone transfers and large responses; blocking TCP port 53 can cause resolution failures.

Why this answer

DNS uses both UDP and TCP on port 53. UDP is used for standard queries, but TCP is necessary for zone transfers or large responses. If only UDP is allowed, some DNS operations may fail.

Port 53 is correct, but the protocol type matters.

Full explanation →

585

MCQmedium

A user reports that their external hard drive, formatted as NTFS, is not showing up in Windows Explorer but is visible in Disk Management as 'Not Initialized'. The drive was working yesterday. What is the most likely cause?

A.The USB cable is defective.

B.The drive's partition table is corrupted.

C.The drive needs a new driver.

D.The drive has a physical head crash.

AnswerB

A corrupted partition table leads to the 'Not Initialized' status, as Windows cannot read the disk's layout.

Why this answer

A 'Not Initialized' status indicates the disk's partition table or signature is missing or corrupted. This often happens due to improper ejection or sudden power loss, causing logical corruption of the disk structure.

Full explanation →

586

MCQeasy

A technician is setting up a conference room where a laptop must connect to a large display for presentations. The display supports HDMI, DisplayPort, and USB-C. The laptop only has a USB-C port that supports DisplayPort Alt Mode. Which cable should the technician use to connect the laptop to the display?

A.USB-C to USB-C cable

B.USB-C to HDMI cable

C.USB-C to DisplayPort cable

D.USB-C to VGA cable

AnswerB

This cable directly uses the laptop's DisplayPort Alt Mode to output video to the display's HDMI port, requiring no additional adapters.

Why this answer

USB-C with DisplayPort Alt Mode can transmit video signals directly, so a USB-C to HDMI cable is the simplest solution. HDMI is commonly supported on displays, and this avoids needing adapters. This tests knowledge of USB-C Alt Mode capabilities for video output.

Full explanation →

587

MCQmedium

A user reports that the multifunction printer is producing copies with a faint vertical line running down the entire page. The line appears in the same position on every copy, but printed documents from a PC do not have the line. What is the most likely cause?

A.The toner cartridge is defective and needs replacement.

B.The printer's fuser unit is damaged.

C.The scanner glass or scanning strip has a scratch or debris.

D.The network cable is faulty.

AnswerC

A scratch or debris on the scanner glass will appear as a vertical line on all scanned images, including copies.

Why this answer

This question differentiates between scanner and printer issues. Since the line appears only on copies (scan then print) and not on PC prints, the problem is in the scanner assembly. A dirty or scratched scanner glass or a stuck debris on the scanning element causes consistent vertical lines.

Full explanation →

588

MCQmedium

A customer reports that their external USB 3.0 hard drive is only achieving transfer speeds of about 35 MB/s, far below the expected 5 Gbps. The drive is connected to a USB 3.0 port on the front of the computer case. What is the most likely cause of this performance issue?

A.The drive is formatted with FAT32 instead of NTFS.

B.The front-panel USB port is internally connected to a USB 2.0 header on the motherboard.

C.The hard drive is failing and needs to be replaced.

D.The USB 3.0 driver is not installed in the operating system.

AnswerB

This is the most likely cause because connecting a USB 3.0 device to a USB 2.0 header forces the device to operate at USB 2.0 speeds (480 Mbps, roughly 35-40 MB/s).

Why this answer

This question tests understanding of USB standards and cable/connector compatibility. USB 3.0 (5 Gbps) requires a cable with 9 pins, but if the case's front-panel header or cable is wired for USB 2.0 only (4 pins), the device will fall back to USB 2.0 speeds (480 Mbps, ~35 MB/s). The correct answer is that the front-panel USB port is internally connected to a USB 2.0 header.

Full explanation →

589

MCQmedium

A technician is troubleshooting a connectivity issue where a user's computer can ping the default gateway but cannot access a web server at 203.0.113.50. The technician runs a tracert and sees that the first hop responds, but subsequent hops time out. What is the most likely cause?

A.The default gateway is down.

B.The web server is offline.

C.A router along the path is misconfigured or dropping packets.

D.The user's computer has a duplicate IP address.

AnswerC

The first hop works, but subsequent hops timing out indicates a routing issue beyond the local network, likely a misconfigured router or firewall blocking traffic.

Why this answer

Tracert shows the path packets take to a destination. If the first hop (default gateway) responds but later hops time out, it suggests a routing issue beyond the local network, such as a misconfigured router or a firewall blocking ICMP. The fact that the gateway is reachable rules out local connectivity problems.

Full explanation →

590

MCQeasy

A customer brings in an iPhone that is running iOS 15 and complains that a newly released app crashes immediately upon launch. The app requires iOS 16 or later. What is the best solution?

A.Reinstall the app from the App Store.

B.Update the iPhone to iOS 16 or later.

C.Restart the iPhone to clear temporary files.

D.Download an older version of the app from a third-party site.

AnswerB

Updating the OS to meet the app's minimum requirement resolves the compatibility issue.

Why this answer

This question focuses on app compatibility with mobile operating systems. Since the app requires a newer iOS version, the only viable solution is to update the device to iOS 16 if supported. If the iPhone model cannot support iOS 16, the app cannot be used.

This highlights the importance of checking system requirements before installation.

Full explanation →

591

MCQmedium

A user reports that their wireless earbuds produce choppy audio when they walk to the other side of their office, but work fine when near the phone. The office has many metal filing cabinets and concrete walls. Which of the following is the most likely cause of the audio degradation?

A.The earbuds' battery is low.

B.The phone's Bluetooth antenna is weak.

C.There is interference from a nearby microwave oven.

D.Physical obstructions are blocking the Bluetooth signal.

AnswerD

Metal filing cabinets and concrete walls can absorb or reflect Bluetooth signals, causing choppy audio at a distance.

Why this answer

Bluetooth signals are susceptible to physical obstructions like metal and concrete, which can cause signal attenuation and packet loss. This tests understanding of environmental factors affecting wireless range and performance.

Full explanation →

592

MCQhard

A technician is troubleshooting a network where users intermittently lose connectivity to a critical database server. The technician notices that the server's IP address is being duplicated on the network. Which protocol is responsible for detecting and reporting this conflict?

A.ARP

B.DHCP

C.ICMP

D.DNS

AnswerA

ARP resolves IP to MAC; a duplicate IP causes ARP table instability, and some systems use ARP probes to detect conflicts.

Why this answer

This question tests knowledge of ARP, which is used to map IP addresses to MAC addresses. When an IP address conflict occurs, ARP may show multiple MAC addresses for the same IP, and some operating systems or network devices can detect and report this via ARP.

Full explanation →

593

MCQmedium

A technician is configuring a company-issued tablet for a sales representative who frequently works from a car. The tablet needs internet access for CRM software and GPS navigation. Which mobile network connectivity option is most appropriate for this scenario?

A.Connect the tablet to a personal hotspot from the sales rep's smartphone.

B.Install a Wi-Fi extender in the car to boost nearby public Wi-Fi signals.

C.Use a tablet with an integrated cellular modem and a company data plan.

D.Rely on Bluetooth tethering to a laptop for internet access.

AnswerC

A cellular modem provides dedicated, always-on internet access without relying on other devices or Wi-Fi networks.

Why this answer

An integrated cellular modem (4G/5G) provides reliable internet access on the go, independent of Wi-Fi hotspots. This is ideal for mobile workers who need constant connectivity while traveling.

Full explanation →

594

MCQhard

A technician is troubleshooting a laptop that emits a series of beeps (one long, two short) on startup and displays nothing on the screen. The laptop was working fine until the user installed a new RAM module. What is the most likely cause?

A.The new RAM module is incompatible with the laptop's chipset

B.The laptop's display cable has become disconnected

C.The laptop's CMOS battery is dead

D.The user accidentally damaged the motherboard when installing the RAM

AnswerA

Incompatible or improperly seated RAM can cause POST failures that produce beep codes. Some motherboards map memory errors to video-related beep codes. The timing (after RAM install) strongly suggests this.

Why this answer

One long and two short beeps is a common BIOS POST code indicating a video or display adapter issue. However, since the problem started after installing RAM, it is likely that the RAM module is incompatible or not seated properly, causing a memory-related POST failure that manifests as a video error code on some systems.

Full explanation →

595

MCQhard

During a hardware upgrade, you install a new high-end graphics card and connect a 144Hz gaming monitor via DisplayPort. The monitor is set to 144Hz in Windows, but the screen occasionally goes black for a few seconds during gameplay. What is the most likely cause?

A.The graphics card is overheating.

B.The monitor's refresh rate is set too high for the cable.

C.The power supply unit is insufficient.

D.The monitor's firmware is outdated.

AnswerB

DisplayPort cables have bandwidth limits; a cable rated for lower speeds may cause signal loss at 144Hz, resulting in black screens. Using a certified high-speed cable resolves this.

Why this answer

Intermittent black screens at high refresh rates often indicate that the DisplayPort cable does not meet the required bandwidth for 144Hz at the monitor's resolution. This can also be caused by power supply issues or driver problems, but cable bandwidth is a common culprit.

Full explanation →

596

MCQeasy

A user reports that their new monitor, which uses a DisplayPort connection, shows no signal. The technician finds the monitor is connected to the PC's HDMI port via a passive adapter. What is the most likely issue?

A.The HDMI cable is faulty

B.The monitor is set to the wrong input source

C.The passive adapter cannot convert HDMI to DisplayPort

D.The graphics driver is outdated

AnswerC

Passive adapters only work for DisplayPort to HDMI, not the reverse, so an active adapter is needed.

Why this answer

Passive DisplayPort to HDMI adapters often require an active adapter to convert the signal properly, especially if the source only outputs HDMI. This tests understanding of signal conversion and adapter types. The monitor's DisplayPort input needs a compatible signal from the PC's HDMI output.

Full explanation →

597

MCQeasy

A customer complains that their smartphone's mobile hotspot stops working after a few minutes. They are using a prepaid data plan. What is the most likely cause?

A.The smartphone's battery saver mode is turning off the hotspot.

B.The connected device is out of Bluetooth range.

C.The carrier's prepaid plan restricts hotspot usage or throttles data.

D.The smartphone's Wi-Fi antenna is overheating.

AnswerC

Prepaid plans often have hotspot limits or throttling, causing the connection to drop or slow after initial use.

Why this answer

This scenario highlights carrier restrictions on tethering. Many prepaid plans limit hotspot usage or throttle data after a certain amount, causing the hotspot to disconnect or slow down.

Full explanation →

598

MCQmedium

After deploying a new 802.11ac access point, users report that some devices can connect but others cannot, even though they are in the same room. All devices support 5 GHz. What is the most likely cause?

A.The access point is using a non-overlapping channel.

B.The access point has 2.4 GHz radios disabled.

C.The devices have incorrect SSID credentials.

D.The access point is overloaded with clients.

AnswerB

Correct. If only 5 GHz is enabled, devices that only support 2.4 GHz cannot connect.

Why this answer

This scenario tests knowledge of wireless standards and band compatibility. 802.11ac operates only on 5 GHz. If the access point is configured to use only 5 GHz, older devices that only support 2.4 GHz will not connect, but 5 GHz-capable devices will.

Full explanation →

599

MCQmedium

A technician is setting up a new Android tablet for a warehouse worker who uses a barcode scanner app that requires constant Wi-Fi. The warehouse has multiple access points with the same SSID. The tablet frequently disconnects and reconnects as the worker moves around. What should the technician configure to improve connectivity?

A.Set the tablet to use a static IP address.

B.Disable the tablet's Bluetooth radio.

C.Configure the tablet to prefer the 2.4 GHz band over 5 GHz.

D.Enable the 'Wi-Fi roaming' or 'aggressive handover' setting in the tablet's advanced Wi-Fi options.

AnswerD

This setting optimizes the device to quickly reassociate with a stronger AP, reducing disconnects when moving.

Why this answer

Enabling the 'aggressive Wi-Fi handover' or similar roaming assist feature helps the device quickly switch between access points without dropping the connection. This is crucial in environments with multiple APs.

Full explanation →

600

MCQmedium

A user reports that their computer is making a loud grinding noise and then shuts down after a few minutes. The CPU temperature is normal at idle. What is the most likely cause?

A.Hard drive failure

B.CPU fan bearing failure

C.Power supply fan failure

D.Loose CPU cooler

AnswerB

A failing fan bearing causes grinding noise and can lead to inadequate cooling under load, triggering thermal shutdown.

Why this answer

A grinding noise typically indicates a mechanical bearing failure in a fan. The CPU fan may still spin but fail under load, causing overheating and shutdown. This scenario tests the ability to correlate auditory symptoms with hardware failure.

Full explanation →

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