Knowledge + Practice

CompTIA A+ Core 1 220-1201 (220-1201) — Questions 301–375

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

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301

MCQeasy

A customer reports that their home office devices—a laptop, printer, and smartphone—can communicate with each other but cannot access the internet. They have a single router provided by their ISP. Which network type is most likely being used for local communication?

A.Personal Area Network (PAN)

B.Local Area Network (LAN)

C.Wide Area Network (WAN)

D.Metropolitan Area Network (MAN)

AnswerB

A LAN connects devices within a home or office, enabling local communication, which matches the customer's description of devices talking to each other.

Why this answer

A Local Area Network (LAN) connects devices within a limited area, such as a home or office, allowing them to share resources like files and printers. The router creates a LAN for local communication, but internet access requires a properly configured WAN connection. The scenario describes a LAN issue, not a PAN (which is too short-range for a whole home) or a WAN/MAN.

Full explanation →

302

MCQmedium

A technician is setting up a mobile point-of-sale system for a small retail store. The tablet needs to be mounted on the counter and remain powered throughout the day. Which two accessories are essential for this deployment?

A.A rugged case and a Bluetooth keyboard.

B.A stand and a charging dock.

C.A screen protector and a stylus.

D.A portable battery pack and a car charger.

AnswerB

The stand provides a stable mount, and the charging dock ensures the tablet remains powered all day, which is essential for continuous operation.

Why this answer

A secure stand keeps the tablet in place, and a continuous power source (such as a charging dock or cable) ensures it stays charged. A screen protector is optional, and a Bluetooth keyboard is not needed for a POS system. The correct answer is a stand and a charging dock.

Full explanation →

303

MCQeasy

A customer reports that their internet connection drops frequently during rainstorms. They have a cable modem and a wireless router. What is the most likely cause of the intermittent connection?

A.The wireless router is overheating.

B.The cable modem's coaxial cable connection is compromised by moisture.

C.The DSL filter is malfunctioning.

D.The satellite dish is out of alignment.

AnswerB

Moisture in coaxial cable connections can cause intermittent signal loss, which is a known issue with cable internet during rain.

Why this answer

Cable internet uses coaxial cables that can be susceptible to signal degradation when water enters the line, especially at connectors or splices. This is a common issue during rainstorms. DSL, fiber, and satellite are less affected by rain in this specific way, though satellite can have rain fade.

Full explanation →

304

MCQeasy

A technician is configuring a new SOHO router for a client who has a DSL internet connection. What type of cable will the technician use to connect the router to the wall jack?

A.Coaxial cable (RG-6)

B.Telephone cable (RJ-11)

C.Fiber optic cable

D.Ethernet cable (RJ-45)

AnswerB

DSL operates over standard telephone lines using RJ-11 connectors.

Why this answer

DSL uses standard telephone cables (RJ-11) to connect to the wall jack. Coaxial (RG-6) is for cable, fiber uses a specialized connector, and Ethernet (RJ-45) is used for LAN connections or some fiber modems.

Full explanation →

305

MCQmedium

A user’s laptop is connected to a Wi-Fi network with a strong signal, but the user cannot access any network resources. The IP configuration shows an address of 192.168.1.50 with a subnet mask of 255.255.255.0 and a default gateway of 192.168.1.1. The technician pings the gateway successfully. What should the technician check next?

A.Replace the Wi-Fi adapter.

B.Check the DNS server settings on the laptop.

C.Verify the SSID is correct.

D.Disable the firewall temporarily.

AnswerB

Successful gateway ping indicates layer 3 connectivity, so the problem is likely name resolution; incorrect DNS settings would prevent browsing.

Why this answer

Since the gateway is reachable, the issue is likely beyond the local network. DNS is the most common cause of being unable to access resources by name when basic connectivity exists. Checking DNS resolution is the logical next step.

Full explanation →

306

MCQhard

A technician is configuring a network for a municipal government that needs to connect public Wi-Fi hotspots across a city, covering an area of about 50 square kilometers. The network must be secure and provide internet access to citizens. Which network type should be deployed?

A.Local Area Network (LAN)

B.Wide Area Network (WAN)

C.Metropolitan Area Network (MAN)

D.Personal Area Network (PAN)

AnswerC

A MAN is specifically built to cover a city-sized area, ideal for municipal Wi-Fi hotspots and secure internet access.

Why this answer

A Metropolitan Area Network (MAN) is designed to cover a city-sized area, making it suitable for connecting public Wi-Fi hotspots across 50 square kilometers. It can provide secure, high-speed internet access to citizens. A WAN would be too broad, a LAN is too small, and a PAN is for personal devices.

Full explanation →

307

MCQmedium

A company uses VMware vSphere to run multiple VMs on a single ESXi host. A user reports that their VM suddenly lost network connectivity, but other VMs on the same host are working fine. The technician checks the virtual switch configuration and finds that the VM’s virtual NIC is connected to a port group that has no active uplinks. What should the technician do to restore connectivity?

A.Reboot the ESXi host to refresh the network stack.

B.Change the VM’s virtual NIC type from E1000 to VMXNET3.

C.Add a physical NIC to the port group as an active uplink.

D.Disable and re-enable the virtual switch.

AnswerC

Adding an uplink connects the port group to the physical network, allowing the VM to communicate externally. This directly addresses the root cause.

Why this answer

In virtualization, a port group defines network settings for VMs. If a port group has no active uplinks, VMs in that group cannot communicate outside the host. The correct answer involves either adding an uplink or moving the VM to a working port group.

This tests understanding of virtual networking components.

Full explanation →

308

MCQeasy

A technician is troubleshooting a desktop PC that will not boot. The motherboard has a 24-pin ATX power connector and a 4-pin CPU power connector. The power supply has a 20+4 pin main connector and an 8-pin CPU connector. What is the correct way to connect the power supply?

A.Use the 20+4 pin connector as a 24-pin, and split the 8-pin CPU connector into a 4+4 pin to use only 4 pins.

B.Connect the 20-pin portion only and leave the 4-pin unconnected; use the 8-pin CPU connector as is.

C.Use the 20+4 pin as a 24-pin, and connect the 8-pin CPU connector to the 4-pin header by forcing it.

D.Replace the power supply with one that has a dedicated 24-pin and 4-pin connector.

AnswerA

This is the correct method; the 20+4 pin is designed to be combined, and the 8-pin CPU connector can be split to fit a 4-pin header.

Why this answer

The correct answer is A because the 20+4 pin connector can be used as a 24-pin by combining the 20-pin and 4-pin sections, and the 8-pin CPU connector can be split into a 4+4 pin to fit the 4-pin CPU power header. This tests understanding of modular power supply connectors and their flexibility.

Full explanation →

309

MCQmedium

A technician is troubleshooting a PC that fails to boot and emits a series of long beeps. The motherboard documentation indicates this is a memory error. Which component on the motherboard is responsible for generating these beep codes?

A.CMOS battery

B.BIOS/UEFI chip

C.Chipset

D.Super I/O chip

AnswerB

The BIOS/UEFI firmware runs POST and outputs beep codes through the speaker to indicate hardware faults like memory errors.

Why this answer

The BIOS/UEFI firmware is responsible for the Power-On Self-Test (POST) and uses the speaker to emit beep codes to indicate hardware errors. The CMOS battery only retains settings, the chipset handles data flow, and the Super I/O manages I/O but not POST beep codes.

Full explanation →

310

MCQhard

A technician is troubleshooting a user's inability to reach a server at 172.16.50.100. The user's IP is 172.16.50.50 with subnet mask 255.255.255.0. The technician runs a traceroute and sees the first hop is the gateway (172.16.50.1), but the second hop times out. What does this indicate?

A.The user's IP address is in the wrong subnet.

B.The server is powered off.

C.There is a routing problem between the gateway and the server.

D.The user's default gateway is incorrect.

AnswerC

The traceroute shows the user can reach the gateway, but the next hop fails, indicating a routing issue in the path to the server.

Why this answer

The user can reach the local gateway, but the next hop (likely a router) is not responding. This suggests a routing issue beyond the local network, such as a misconfigured router or firewall blocking ICMP. This tests understanding of traceroute and routing path analysis.

Full explanation →

311

MCQeasy

A technician is configuring a new wireless router for a home office. The customer wants to ensure that guests can access the internet but cannot see other devices on the main network. Which feature should the technician enable on the router?

A.MAC address filtering

B.Port forwarding

C.Guest network

D.WPS (Wi-Fi Protected Setup)

AnswerC

Enabling a guest network creates a separate VLAN that isolates guest traffic, meeting the customer's requirement.

Why this answer

A guest network creates a separate SSID and VLAN that isolates guest traffic from the main network, allowing internet access while preventing access to local devices. This is a common feature on modern routers for security and privacy.

Full explanation →

312

MCQeasy

A customer wants to use their tablet as a secondary display for their laptop while traveling. They need a solution that does not require a Wi-Fi network. Which accessory should you recommend?

A.A Bluetooth keyboard and mouse set.

B.A USB-C to HDMI adapter.

C.A wireless display adapter like Miracast.

D.A portable battery pack.

AnswerB

This adapter connects the tablet to the laptop's video output, allowing the tablet to serve as a monitor via a wired HDMI connection, which does not rely on Wi-Fi.

Why this answer

A USB-C to HDMI adapter allows the tablet to act as a monitor via a wired connection, which works without Wi-Fi. Wireless solutions like Miracast or AirPlay require a network. The correct answer is the USB-C to HDMI adapter.

Full explanation →

313

MCQeasy

During a hardware install, you connect a new 4K monitor to a desktop PC using an HDMI cable. The display shows a 'No Signal' message. The PC boots normally and the monitor is powered on. What is the most likely cause?

A.The monitor's refresh rate is set too high in the BIOS.

B.The HDMI cable is not rated for 4K bandwidth.

C.The PC's power supply is insufficient for the new monitor.

D.The monitor's input source is set to VGA instead of HDMI.

AnswerB

Standard HDMI cables may not support 4K; using a high-speed HDMI cable or a DisplayPort cable would resolve this.

Why this answer

Many older graphics cards or motherboards have HDMI ports that only support up to 1080p or 1440p, not 4K at the required bandwidth. The 'No Signal' error often means the graphics output is incompatible with the monitor's resolution or refresh rate. Checking the GPU specifications and using a DisplayPort cable if available is the correct approach.

Full explanation →

314

MCQmedium

A technician is setting up a new network printer in a conference room. The printer has an RJ45 port for wired networking, but the only available wall jack is labeled with a different room number. The technician needs to connect the printer to the network. What is the best approach?

A.Connect the printer directly to the router using a long Ethernet cable

B.Use a tone generator and probe to trace the wall jack to the patch panel

C.Assume the jack is functional and connect the printer

D.Use a WiFi adapter for the printer instead

AnswerB

This tool allows the technician to identify which cable in the patch panel corresponds to the wall jack, enabling proper connection.

Why this answer

The wall jack may be connected to a different network drop. The technician should use a tone generator and probe to identify which port on the patch panel corresponds to that wall jack, ensuring correct connectivity.

Full explanation →

315

MCQeasy

A small office uses a single public IP address for internet access. The network administrator wants internal web servers to be reachable from the internet on port 80. Which network service should be configured on the router to allow this?

A.DHCP

B.Port forwarding

C.DNS

D.VPN

AnswerB

Port forwarding maps an external port to an internal IP and port, enabling external access to internal services.

Why this answer

Port forwarding allows external requests on a specific port to be redirected to an internal IP address and port. This is the standard method to make internal servers accessible from the internet when using NAT. Other options like DHCP or DNS do not handle port-based redirection.

Full explanation →

316

MCQmedium

A technician is configuring a virtual machine to host a database server that requires consistent high disk I/O performance. The host uses a RAID 10 array of SSDs. Which virtual disk type should the technician select to minimize overhead and maximize performance?

A.Dynamically expanding virtual disk

B.Fixed-size virtual disk

C.Differencing virtual disk

D.Thin provisioned virtual disk

AnswerB

A fixed-size disk pre-allocates all space, resulting in contiguous blocks and lower I/O latency, ideal for high-performance databases.

Why this answer

A fixed-size virtual disk (also called thick provisioning) allocates all required space at creation, reducing fragmentation and I/O overhead compared to dynamically expanding disks. This is best for performance-sensitive workloads like databases.

Full explanation →

317

MCQmedium

During a conference call, a user complains that their wireless earbuds keep disconnecting from their smartphone every few minutes. The earbuds work fine when paired with a different phone. What is the most likely cause?

A.The earbuds have a low battery.

B.The smartphone's Bluetooth driver is outdated.

C.Bluetooth interference from other devices in the conference room.

D.The earbuds are not compatible with the smartphone's Bluetooth version.

AnswerC

Conference rooms often have many wireless devices (phones, laptops, projectors) that can cause Bluetooth interference, leading to frequent disconnections.

Why this answer

When an accessory works with one device but not another, the issue is likely with the original device's Bluetooth configuration or interference. Interference from other devices or a poor Bluetooth antenna in the phone are common causes. The correct answer is Bluetooth interference from other devices in the conference room.

Full explanation →

318

MCQhard

A user complains that their computer with a 256 GB NVMe SSD is running out of storage space. They want to add more internal storage but only have one M.2 slot. What is the best solution to expand capacity without sacrificing performance?

A.Replace the NVMe SSD with a larger capacity NVMe SSD.

B.Install a SATA SSD in an available 2.5-inch drive bay.

C.Use an external USB SSD for additional storage.

D.Add a second M.2 drive using a PCIe adapter card.

AnswerA

This uses the single M.2 slot to upgrade capacity while keeping the fastest storage option.

Why this answer

Replacing the existing NVMe SSD with a larger capacity model is the most direct way to increase internal storage while maintaining NVMe performance. Adding a SATA SSD via a 2.5-inch bay is also viable but slower. External drives are not internal.

Full explanation →

319

MCQmedium

A technician is troubleshooting a network where users can access the internet but cannot reach a specific internal web server by its hostname. Pinging the server's IP address works. What is the most likely issue?

A.The web server's firewall is blocking ICMP.

B.The DHCP server is not assigning correct IP addresses.

C.The DNS server does not have a record for the server's hostname.

D.The network switch is dropping packets to the server.

AnswerC

Correct. Missing DNS record prevents hostname resolution while IP works.

Why this answer

This question tests DNS resolution. If the IP works but the hostname does not, the problem is with DNS—either the server's A record is missing or the DNS server is not responding for that zone.

Full explanation →

320

MCQhard

A technician is upgrading a server's storage and needs to connect multiple SATA SSDs. The motherboard has only four SATA ports, but the technician needs to connect six drives. Which connector solution should be used?

A.Use a Y-splitter cable on one SATA port to connect two drives.

B.Install a PCIe SATA controller card with extra ports.

C.Use eSATA to SATA adapters on the external ports.

D.Replace the motherboard with one that has six SATA ports.

AnswerB

A SATA controller card adds additional SATA ports via a PCIe slot, enabling connection of more drives.

Why this answer

The correct answer is B because a SATA expansion card adds additional SATA ports via a PCIe slot, allowing more drives to be connected. This tests knowledge of expansion cards and SATA controller limitations.

Full explanation →

321

MCQmedium

A small office uses a network switch with 24 RJ45 ports to connect all workstations. The switch is connected to the router via a single uplink port. Users report intermittent network drops. The technician suspects a faulty cable between the switch and router. Which tool should be used to test the cable?

A.Tone generator and probe

B.Loopback plug

C.Cable tester

D.Multimeter

AnswerC

A cable tester checks for shorts, opens, and wiring errors in an Ethernet cable, confirming if the cable is faulty.

Why this answer

A cable tester verifies continuity, wiring, and signal integrity in Ethernet cables. This is the correct tool to diagnose a faulty physical connection between the switch and router.

Full explanation →

322

MCQmedium

A technician is deploying a fleet of tablets for field workers. The tablets need to connect to a cellular network for data, but the company wants to minimize data usage. Which setting should the technician configure on each tablet?

A.Enable data saver mode.

B.Disable Wi-Fi.

C.Enable airplane mode.

D.Set the preferred network type to 5G.

AnswerA

Data saver mode restricts background data usage and can also limit foreground data for some apps, helping to minimize overall data consumption.

Why this answer

Limiting background data prevents apps from using data when not in active use, which significantly reduces overall data consumption. This is a common practice for managing data usage on mobile devices.

Full explanation →

323

MCQhard

A technician is deploying a wireless network in a large warehouse with metal shelving. The goal is to provide seamless roaming for handheld scanners. Which technology should the technician implement to ensure clients quickly switch between access points without dropping connections?

A.Enable 802.11r (Fast Roaming) on the access points

B.Use a wireless mesh topology

C.Configure beamforming on each access point

D.Deploy MIMO antennas

AnswerA

802.11r reduces the time it takes for a client to authenticate when moving between APs, ensuring seamless roaming.

Why this answer

Fast roaming (802.11r) enables quick re-authentication when moving between access points, critical for real-time devices. Mesh networks extend coverage but don't guarantee fast roaming. Beamforming improves signal direction but not handoff speed.

MIMO increases throughput, not roaming.

Full explanation →

324

MCQmedium

During a network upgrade, a technician configures a new VoIP phone to use a dedicated VLAN for voice traffic. After connecting the phone to a switch port configured for voice VLAN, the phone powers on but cannot register with the call manager. The switch port is set to trunk mode. Which protocol is essential for the phone to obtain its VLAN assignment?

A.STP

B.CDP

C.RSTP

D.VTP

AnswerB

CDP advertises VLAN information to Cisco phones, allowing them to automatically use the correct voice VLAN.

Why this answer

VoIP phones often use CDP (Cisco Discovery Protocol) or LLDP (Link Layer Discovery Protocol) to receive voice VLAN information from a switch. In this scenario, the switch port is in trunk mode, but without CDP/LLDP, the phone won't know which VLAN to use for voice traffic. CDP is Cisco-proprietary and commonly used in such environments to dynamically assign the voice VLAN.

Full explanation →

325

MCQhard

A user reports that their inkjet printer produces output with horizontal white lines through text and images. The printer has been used heavily for months without maintenance. What should you do to resolve this issue?

A.Replace the fuser assembly

B.Perform a printhead alignment

C.Run the printer's printhead cleaning cycle

D.Replace the pickup rollers

AnswerC

This is the standard first step for clearing clogged nozzles. The cleaning cycle forces ink through the nozzles to remove blockages.

Why this answer

Horizontal white lines on inkjet output indicate clogged printhead nozzles. Over time, dried ink can block nozzles, preventing ink from being deposited. Running a printhead cleaning cycle uses the printer's built-in routine to clear clogs.

If that fails, a manual cleaning or replacement may be needed.

Full explanation →

326

MCQmedium

A customer reports that after a recent fall, their smartphone's screen is completely black, but the device still vibrates when calls come in. The technician suspects the display cable is loose. What is the correct sequence of steps to access and reseat the display cable?

A.Remove the battery first, then the back cover, and reseat the display cable.

B.Remove the back cover, disconnect the battery, then reseat the display cable.

C.Reseat the display cable by inserting a spudger through the charging port.

D.Perform a factory reset to rule out software issues.

AnswerB

This is the correct sequence: back cover off, battery disconnected for safety, then reseat the display cable. It prevents short circuits and damage.

Why this answer

To access the display cable, the technician must first remove the back cover, then the battery (if not integrated), and disconnect the display cable from the motherboard. This sequence ensures safe access without risking a short circuit from a live battery. The display cable is typically a thin ribbon cable near the motherboard.

Full explanation →

327

MCQmedium

A technician is configuring a new NAS with four 10 TB hard drives. The customer wants maximum usable capacity with fault tolerance for one drive failure. The technician sets up RAID 5, but after initialization, the usable capacity is only 10 TB instead of the expected 30 TB. What is the most likely cause?

A.One of the drives is defective and the array is using only three drives.

B.The array was accidentally configured as RAID 1 (mirroring) across two drives.

C.The drives are not all the same size; one is 5 TB.

D.The RAID controller is using a different stripe size.

AnswerB

Correct. RAID 1 with two drives yields 10 TB usable, matching the reported capacity.

Why this answer

RAID 5 with four drives of equal size should yield (n-1) * capacity = 30 TB. A 10 TB result suggests only two drives are being used, possibly due to a misconfiguration like RAID 1 or a stripe set of two drives. This tests RAID 5 capacity calculation and troubleshooting.

Full explanation →

328

MCQhard

A company deploys a new 802.11ax (Wi-Fi 6) access point to support high-density environments. Some older laptops with 802.11ac adapters cannot connect, while newer Wi-Fi 6 laptops work fine. The SSID is broadcast and security is set to WPA2. What is the MOST likely cause?

A.The access point is set to 802.11ax-only mode.

B.The laptops have outdated firmware that does not support OFDMA.

C.The access point is configured to use WPA3 only.

D.The 5 GHz radio is disabled on the access point.

AnswerC

WPA3 is often enabled by default on Wi-Fi 6 APs; 802.11ac laptops may not support WPA3, causing connection failures.

Why this answer

Wi-Fi 6 (802.11ax) is backward compatible with 802.11ac, but if the access point is configured to require WPA3 (a common Wi-Fi 6 feature), older adapters that only support WPA2 will fail to connect.

Full explanation →

329

MCQmedium

A user reports that their computer randomly restarts when playing games. The technician suspects the CPU is overheating. Which tool should the technician use to monitor the CPU temperature under load?

A.Windows Task Manager

B.The BIOS/UEFI hardware monitor

C.A third-party utility like HWMonitor

D.Windows Event Viewer

AnswerC

HWMonitor logs CPU temperatures in real time, allowing the technician to see peak temperatures during gaming.

Why this answer

To diagnose overheating, a technician needs real-time temperature monitoring. A tool like HWMonitor or Core Temp provides accurate CPU temperature readings. BIOS/UEFI shows idle temps only, and Event Viewer logs crashes but not temperatures.

Full explanation →

330

MCQeasy

A customer reports that their desktop PC with a 1 TB HDD is running very slowly, especially when opening large files. They mention that the drive light is constantly active even when the system is idle. What is the most likely cause of this performance issue?

A.The CPU is overheating and throttling performance.

B.The hard disk drive is failing and has developed bad sectors.

C.The system has a virus that is encrypting files in the background.

D.The RAM is insufficient and the system is using the hard drive as virtual memory.

AnswerB

A failing HDD with bad sectors causes the drive to repeatedly attempt reads/writes, leading to constant activity and slow performance.

Why this answer

A failing HDD often causes constant drive activity and slow file access due to bad sectors or mechanical wear. This is a common symptom that technicians should recognize before data loss occurs. SSDs or other components do not typically exhibit this behavior.

Full explanation →

331

MCQmedium

A user reports that their laptop can see multiple Wi-Fi networks but cannot connect to any of them. Other devices in the same location connect without issue. What is the most likely cause?

A.The laptop's wireless adapter is disabled in Device Manager.

B.The Wi-Fi router is out of range.

C.The laptop has an incorrect or outdated Wi-Fi password saved for the networks.

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

AnswerC

A wrong password prevents authentication even if the network is visible; forgetting the network and re-entering the password often resolves this.

Why this answer

Seeing networks but failing to connect often points to a misconfiguration on the device, such as an incorrect security key or saved credentials that no longer match. This is a common troubleshooting step.

Full explanation →

332

MCQmedium

A user reports that their wired desktop cannot connect to the network. The technician verifies the link light on the computer's NIC is off. Using a known-good patch cable does not resolve the issue. Which tool should be used to test the wall jack's wiring?

A.Cable tester

B.Tone generator and probe

C.Loopback plug

D.Multimeter

AnswerB

This tool set allows the technician to identify the specific cable at the patch panel and then test continuity, making it ideal for this scenario.

Why this answer

A tone generator and probe allow a technician to trace the wall jack back to the patch panel and verify continuity. Since the link light is off and a known-good cable didn't help, the issue may be in the wall jack or its termination, and tracing the cable is the next step.

Full explanation →

333

MCQeasy

A company deploys a new multifunction printer that supports both USB and network connectivity. The printer is installed in a conference room and must be accessible to all employees on the same subnet. Which connection method should the technician use?

A.Connect the printer via USB to the nearest workstation

B.Connect the printer to the network using an Ethernet cable

C.Use a USB-to-Ethernet adapter

D.Enable Wi-Fi Direct on the printer

AnswerB

Ethernet provides network access, enabling any user on the subnet to print, scan, or use other functions.

Why this answer

This question assesses understanding of connectivity options for shared multifunction devices. A network connection (Ethernet) allows multiple users on the same subnet to access the printer simultaneously. USB is limited to a single directly connected computer.

Full explanation →

334

MCQhard

A user reports that their multifunction printer makes a loud grinding noise when printing, and the output has vertical black streaks. The technician has already replaced the toner cartridge. What component is most likely failing?

A.The fuser assembly

B.The imaging drum

C.The pickup rollers

D.The transfer roller

AnswerB

A damaged or worn imaging drum can produce grinding sounds and vertical streaks, as it rotates and contacts the toner.

Why this answer

This question tests advanced troubleshooting of laser printer mechanical issues. The imaging drum is a common wear item that can cause grinding noises and vertical streaks when damaged. The fuser or pickup rollers would produce different symptoms.

Full explanation →

335

MCQhard

A technician is configuring a high-performance workstation for scientific simulations that require large amounts of RAM. The motherboard has eight DDR4 slots and supports quad-channel memory. The technician installs four 16 GB sticks in the correct slots for quad-channel mode. After booting, the system reports 64 GB of RAM but only runs in dual-channel mode. What is the most likely cause?

A.The RAM sticks are not identical in speed and timings.

B.The motherboard BIOS needs to be configured to enable quad-channel mode.

C.The installed CPU only supports dual-channel memory.

D.The RAM is installed in the wrong slots for quad-channel operation.

AnswerC

The CPU's memory controller determines the maximum number of channels. A dual-channel CPU will only use two channels even if four sticks are installed, so the system will run in dual-channel mode.

Why this answer

Quad-channel memory requires a compatible CPU that supports quad-channel architecture. Most consumer CPUs (like Intel Core i7/i9) only support dual-channel, even if the motherboard has four slots. Server or HEDT (High-End Desktop) CPUs are needed for quad-channel.

Full explanation →

336

MCQmedium

A user on a corporate iPhone cannot receive push notifications from the company's email app, even though notifications are enabled in the app settings. Other apps on the phone receive notifications normally. What should the technician check first?

A.Verify that the device is not in Do Not Disturb mode.

B.Check the notification settings for the email app in iOS Settings.

C.Reinstall the email app to reset its configuration.

D.Update the iPhone to the latest iOS version.

AnswerB

iOS has per-app notification toggles; if disabled at the system level, the app cannot show notifications even if enabled in-app.

Why this answer

This question tests troubleshooting of mobile app notifications. Since only one app is affected, the issue is likely app-specific. Checking the app's notification settings within iOS (Settings > Notifications > [App]) is the correct first step, as the user may have enabled notifications in the app but iOS-level permissions could be blocking them.

Full explanation →

337

MCQmedium

A client wants to add a second internal hard drive to their desktop for additional storage, but all SATA ports on the motherboard are already used. What is the best solution?

A.Use a USB-to-SATA adapter and connect the drive externally.

B.Install a SATA expansion card into an available PCIe slot.

C.Replace the motherboard with one that has more SATA ports.

D.Use an external hard drive enclosure connected via USB.

AnswerB

This adds additional SATA ports internally, allowing the new drive to be installed inside the case.

Why this answer

An eSATA or SATA expansion card adds more SATA ports via a PCIe slot. USB adapters are slower, and replacing the motherboard is unnecessary. External enclosures are not internal.

Full explanation →

338

MCQeasy

A technician is upgrading a client's laptop from 8 GB to 16 GB of RAM. After installing the new module, the laptop powers on but the screen remains black, and the system emits a series of short beeps. What is the most likely issue?

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

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

C.The laptop's battery is dead.

D.The RAM is installed in the wrong orientation.

AnswerB

Improperly seated RAM is a common cause of boot failures with beep codes. Reseating the module usually resolves the issue.

Why this answer

A series of short beeps on a laptop usually indicates a memory failure, such as incompatible or improperly seated RAM. The most common cause is that the new RAM module is not fully inserted into the slot, causing a poor connection. The technician should reseat the module firmly until it clicks into place.

Full explanation →

339

MCQmedium

A user reports that a virtual machine running on a workstation is extremely slow, especially during high I/O operations. The host has 16 GB of RAM, an SSD, and a quad-core CPU. The VM is configured with 8 GB RAM and 4 vCPUs. What is the most likely cause of the performance issue?

A.The host does not have enough RAM for the VM

B.The VM has too many virtual CPUs assigned

C.The SSD is too slow for virtualization

D.The VM is using a dynamic disk instead of a fixed-size disk

AnswerB

Assigning 4 vCPUs to a quad-core host can cause CPU scheduling overhead; reducing vCPUs to 2 often improves performance.

Why this answer

This question tests resource allocation awareness. Over-allocating vCPUs can cause contention as the hypervisor tries to schedule multiple virtual CPUs on limited physical cores, leading to performance degradation. The correct answer is to reduce the vCPU count.

Full explanation →

340

MCQhard

A network engineer is designing a new data center and needs to connect multiple servers to a core switch with redundant paths. To prevent loops while allowing failover, which networking hardware feature should be implemented?

A.Enable Link Aggregation Control Protocol (LACP) on the server connections.

B.Enable Rapid Spanning Tree Protocol (RSTP) on all switches.

C.Use a hub instead of a switch for the core connection.

D.Configure all switch ports as access ports.

AnswerB

RSTP provides loop prevention and fast convergence in case of link failure, making it ideal for redundant network designs.

Why this answer

This question tests knowledge of Spanning Tree Protocol (STP) and its variants. In a network with redundant links, STP is essential to prevent broadcast storms and loops. The correct answer is to enable Rapid Spanning Tree Protocol (RSTP) on the switches, which provides faster convergence than classic STP.

Full explanation →

341

MCQmedium

A technician is configuring a cloud-based virtual machine for a developer who needs to run a custom application that requires 16 GB of RAM and 4 vCPUs. The technician selects an instance type that meets these specs. After launching, the developer complains the application runs slowly. What is the most likely cause?

A.Insufficient storage IOPS

B.Network bandwidth throttling

C.Resource contention from other tenants

D.Incorrect operating system version

AnswerC

In a public cloud, multiple VMs share physical hardware; if neighbors are busy, your VM may not get full resources, causing slowdowns.

Why this answer

Cloud VMs often experience resource contention due to noisy neighbors in multi-tenant environments. Even if the instance type meets specs, performance can degrade if other tenants on the same physical host consume resources. The technician should check if the instance is on a shared host and consider dedicated instances.

Full explanation →

342

MCQmedium

A user reports that their internet connection drops out frequently, especially during rainstorms. They have a dish mounted on their roof. Which connection type are they most likely using?

A.Fiber-optic

B.Cable broadband

C.Satellite

D.DSL

AnswerC

Satellite signals can be disrupted by heavy rain, known as rain fade.

Why this answer

Satellite internet is susceptible to rain fade, where heavy rain attenuates the signal, causing dropouts. Fiber and cable are underground and unaffected by rain, while DSL uses phone lines. This symptom is classic for satellite connections.

Full explanation →

343

MCQhard

A technician upgrades a PC from a traditional HDD to an NVMe SSD. After installation, the BIOS detects the SSD, but Windows does not appear in the boot menu. What should the technician do to resolve this?

A.Change the SATA mode from AHCI to IDE

B.Enable Legacy boot mode in BIOS

C.Set the BIOS to UEFI boot mode and ensure the SSD is GPT partitioned

D.Update the chipset drivers

AnswerC

NVMe SSDs require UEFI and GPT for booting; if the drive was cloned from an MBR HDD, it may need conversion or a fresh Windows install in UEFI mode.

Why this answer

When migrating from an HDD to an NVMe SSD, the BIOS may detect the drive but the boot configuration may be missing or incorrect. The solution is to ensure the boot mode is set to UEFI (not Legacy) and that the drive is formatted with GPT, as NVMe drives require UEFI to boot.

Full explanation →

344

MCQmedium

You are building a new gaming PC and have installed a 750W 80+ Gold power supply. After connecting all components, the system powers on for a second then immediately shuts down. What is the most likely cause?

A.The power supply is underpowered for the components

B.A motherboard standoff is shorting the board to the case

C.The CPU fan is not connected

D.The power supply's voltage selector is set to 230V instead of 115V

AnswerB

An extra or missing standoff can create a short circuit, causing the PSU to immediately shut down to protect components.

Why this answer

A short circuit triggers the PSU's overcurrent protection, causing immediate shutdown. This is common if a motherboard standoff is missing or a screw is lodged under the board. Other causes like insufficient wattage or loose cables typically cause instability, not instant shutdown.

Full explanation →

345

MCQmedium

A technician is configuring a remote desktop solution for a user who needs to access their Windows workstation from home. Which port must be forwarded on the router for RDP (Remote Desktop Protocol)?

A.22

B.3389

C.5900

D.443

AnswerB

Port 3389 is the default port for RDP, used for remote desktop connections to Windows.

Why this answer

RDP uses TCP port 3389 by default. Port 22 is SSH, port 5900 is VNC, and port 443 is HTTPS. RDP is the standard for Windows remote desktop.

Full explanation →

346

MCQhard

A technician is troubleshooting a network where one workstation intermittently loses connectivity. The cable run is 85 meters and passes through a conduit with several sharp bends. The cable tester shows intermittent shorts. Which cabling issue is most likely?

A.The cable is too long for the network standard.

B.The cable is being pinched or crushed in the conduit.

C.The cable is unshielded and picking up EMI.

D.The cable is a flat patch cable used for a permanent run.

AnswerB

Sharp bends or crushing can damage the cable's internal conductors, causing intermittent shorts.

Why this answer

This question tests understanding of physical cable damage due to improper installation. Sharp bends can exceed the cable's bend radius, causing internal wire damage or shorts. The correct answer identifies this as the root cause.

Full explanation →

347

MCQeasy

A user cannot connect to a remote server using RDP. The network team confirms that the firewall allows outbound traffic on all ports. Which port is typically used for RDP and should be verified on the server side?

A.Port 22

B.Port 3389

C.Port 23

D.Port 5900

AnswerB

Port 3389 is the default port for Remote Desktop Protocol.

Why this answer

RDP (Remote Desktop Protocol) uses port 3389 by default. Port 22 is for SSH, port 23 for Telnet, and port 5900 for VNC. If the server's firewall is not allowing inbound traffic on port 3389, the RDP connection will fail.

Full explanation →

348

MCQmedium

A technician is configuring a network monitoring tool that uses SNMP to query network devices. Which two ports should be allowed for SNMP communication?

A.Port 22 and 23

B.Port 80 and 443

C.Port 161 and 162

D.Port 67 and 68

AnswerC

Port 161 is for SNMP queries and port 162 for SNMP traps.

Why this answer

SNMP uses port 161 for queries (GET/SET) and port 162 for traps (notifications). Port 161 is used by the agent to receive requests, and port 162 is used by the manager to receive traps. Ports 22 and 23 are for SSH and Telnet, 80 and 443 for web, 67 and 68 for DHCP.

Full explanation →

349

MCQeasy

A technician is installing a new network-connected laser printer in a conference room. After connecting the Ethernet cable and power, the printer's control panel shows an IP address of 169.254.3.18. What is the most likely issue?

A.The printer is configured with a static IP address.

B.The printer's Ethernet cable is faulty or not connected properly.

C.The printer's toner cartridge is empty.

D.The printer's firmware needs to be updated.

AnswerB

A poor connection prevents DHCP communication, causing the printer to use APIPA.

Why this answer

An IP address starting with 169.254 indicates the printer failed to obtain an address from a DHCP server and assigned itself an Automatic Private IP Addressing (APIPA) address. The network connection or DHCP server should be checked.

Full explanation →

350

MCQeasy

A small office experiences intermittent Wi-Fi drops on laptops but not on desktops connected via Ethernet. The wireless network uses 2.4 GHz. Which of the following is the MOST likely cause?

A.The access point is overheating.

B.A microwave oven is operating near the access point.

C.The laptops have outdated Bluetooth drivers.

D.The Ethernet switch is failing.

AnswerB

Microwave ovens operate at 2.4 GHz and can cause significant interference, leading to intermittent drops on Wi-Fi but not on wired connections.

Why this answer

The 2.4 GHz band is prone to interference from common household devices like microwaves and cordless phones, which can cause intermittent connectivity issues. This scenario highlights the importance of understanding frequency band characteristics in wireless networking.

Full explanation →

351

MCQmedium

A user's PC randomly restarts during heavy workloads, such as video rendering. The CPU temperature reads 95°C under load. The heatsink fan is spinning, but the thermal paste appears dry and cracked. What is the most effective first step?

A.Replace the CPU fan with a higher RPM model.

B.Apply new thermal paste between the CPU and heatsink.

C.Underclock the CPU in BIOS.

D.Add an additional case fan.

AnswerB

Correct; dry, cracked thermal paste loses its ability to conduct heat, so reapplying it is the most effective fix.

Why this answer

High CPU temperatures under load with dry thermal paste indicate poor heat transfer. Replacing the thermal paste is the most direct and effective solution, as it restores proper thermal conductivity between the CPU and heatsink.

Full explanation →

352

MCQmedium

A technician is upgrading a client's older PC from 8 GB to 16 GB of DDR3 RAM. After installing the new modules, the system boots but only recognizes 8 GB in the BIOS and Windows. The technician has tried reseating the RAM and swapping slots. What should the technician check next?

A.Update the motherboard BIOS to the latest version.

B.Check if the motherboard supports 16 GB of RAM.

C.Verify that the operating system is 64-bit.

D.Test each RAM module individually in a known working system.

AnswerC

A 32-bit OS cannot address more than 4 GB of RAM, so if the system has 16 GB installed, only 4 GB (or less) will be usable, and the BIOS might report the full amount but Windows won't.

Why this answer

32-bit operating systems have a 4 GB memory limit (or slightly more with PAE), so if the client is running a 32-bit version of Windows, it will not recognize more than 4 GB. The technician should verify the OS architecture first.

Full explanation →

353

MCQeasy

A customer reports that their Android smartphone's screen remains black when they press the power button, but the device vibrates when receiving calls. They have already tried a force restart by holding Power+Volume Down for 15 seconds. What should you do next to isolate the issue?

A.Replace the battery immediately.

B.Connect the phone to a known-good external monitor via USB-C to test video output.

C.Perform a factory reset from recovery mode.

D.Reinstall the operating system using a PC.

AnswerB

If the external display shows content, the phone's internal display or its connector is faulty. This isolates the issue to the display assembly.

Why this answer

This scenario points to a display or backlight failure, not a total system crash. The device is operational (vibrates), so the problem is likely with the LCD, backlight, or display cable. Testing with an external display or checking for physical damage is the logical next step.

Full explanation →

354

MCQeasy

A customer reports that their smartphone connects to Wi-Fi at home but cannot connect to the corporate Wi-Fi network at their office. The office uses WPA2-Enterprise with 802.1X authentication. What is the most likely reason for the connectivity failure?

A.The phone's Wi-Fi antenna is damaged.

B.The corporate network requires a different security protocol like WEP.

C.The phone does not have the correct 802.1X credentials configured for the corporate SSID.

D.The phone is out of range of the corporate access point.

AnswerC

WPA2-Enterprise uses 802.1X authentication, which requires a username/password or certificate, unlike the home PSK.

Why this answer

WPA2-Enterprise requires 802.1X authentication, which typically needs a username and password or certificate, not just a pre-shared key. The home network likely uses WPA2-Personal (PSK), so the phone's saved credentials for home won't work at the office.

Full explanation →

355

MCQeasy

A user complains that their LCD monitor has a persistent dark spot in the center of the screen that does not change with different images. What is the most likely issue?

A.The monitor's backlight is failing.

B.There is a stuck pixel.

C.The graphics card is overheating.

D.The video cable is loose.

AnswerB

A stuck pixel appears as a constant dark or bright spot. It is a hardware defect where the pixel's transistor is stuck in one state.

Why this answer

This scenario describes a stuck or dead pixel, a common LCD defect. A dark spot that remains constant indicates a pixel that is not receiving power or is stuck in the off state. This is a hardware defect, not a software or connection issue.

Full explanation →

356

MCQhard

A technician is upgrading a workstation from a dual-core CPU to a quad-core CPU. After installation, the system boots but only shows two cores in the operating system. The technician has already verified the CPU is properly seated. What is the most likely cause?

A.The CPU is counterfeit and only has two functional cores

B.The operating system is limited to two cores due to licensing

C.The motherboard BIOS is outdated and does not fully support the new CPU

D.The CPU cooler is too tight, causing physical damage to the CPU

AnswerC

An outdated BIOS can cause the system to misidentify the CPU, often detecting fewer cores. Updating the BIOS typically resolves this.

Why this answer

If the OS only detects half the cores, the CPU might be faulty, but a more common cause is that the motherboard's BIOS needs an update to support the new CPU's full feature set. Older BIOS versions may not recognize all cores.

Full explanation →

357

MCQmedium

A user reports that their monitor displays a 'No Signal' message when they turn on their computer. The monitor is connected via DisplayPort. The technician checks that the monitor is powered on and the cable is secure. What should the technician check next?

A.Replace the monitor.

B.Check the input source setting on the monitor.

C.Try a different DisplayPort cable or port on the GPU.

D.Update the graphics driver.

AnswerC

A faulty cable or port can cause a 'No Signal' error. Trying a different cable or port is a standard troubleshooting step.

Why this answer

DisplayPort cables can sometimes have issues with the locking mechanism or be partially unseated. The next logical step is to try a different DisplayPort cable or port on the GPU to isolate the issue.

Full explanation →

358

MCQhard

A user reports that their laptop's built-in display shows a dim image that is barely visible even at maximum brightness. An external monitor works perfectly. The laptop uses an LED-backlit screen. What component is most likely failing?

A.The LCD panel is defective.

B.The inverter board is failing.

C.The backlight LED driver is failing.

D.The graphics card is outputting a low signal.

AnswerC

The LED driver provides power to the backlight LEDs. If it fails, the backlight dims or turns off, making the screen very dim even though the LCD is still receiving signal.

Why this answer

A dim display on a laptop with a working external monitor points to a backlight issue. In LED-backlit screens, the backlight is driven by an LED driver circuit on the display or motherboard. A failing backlight or its driver causes dimness while the LCD panel itself may still function.

Full explanation →

359

MCQmedium

A technician is configuring a tablet for field workers who need to transfer large files to a central server. The tablet has a USB-C port. Which connection method provides the fastest data transfer speed?

A.Bluetooth 5.0

B.Wi-Fi 5 (802.11ac)

C.USB 3.1 Gen 2 over USB-C

D.NFC

AnswerC

USB 3.1 Gen 2 supports up to 10 Gbps, making it the fastest widely available wired connection for file transfers.

Why this answer

USB 3.1/3.2 Gen 2 over USB-C supports up to 10 Gbps, faster than Wi-Fi 5 (802.11ac) or Bluetooth. Thunderbolt 3/4 is even faster but not always present; USB-C with proper standard is the best among common options.

Full explanation →

360

MCQeasy

A small office uses a legacy 2.4 GHz wireless b/g router. Employees report frequent disconnects and slow speeds, especially when the microwave is used in the break room. Which change would most directly reduce interference in this scenario?

A.Enable WPA3 encryption on the router.

B.Upgrade to a dual-band router and connect clients to the 5 GHz SSID.

C.Increase the router's transmit power to maximum.

D.Change the 2.4 GHz channel from 6 to 11.

AnswerB

5 GHz is less congested and not affected by microwave interference, directly solving the problem.

Why this answer

The 2.4 GHz band is shared by many devices, including microwaves, which cause interference. Switching to the 5 GHz band avoids this because microwaves operate at 2.4 GHz. This is a common real-world troubleshooting step for wireless connectivity issues.

Full explanation →

361

MCQmedium

A customer complains that their Wi-Fi signal is weak in a specific conference room. You need to measure the signal strength and identify potential interference sources. Which tool is best suited for this task?

A.Spectrum analyzer

B.Wi-Fi analyzer

C.Cable tester

D.Multimeter

AnswerB

A Wi-Fi analyzer provides signal strength readings, channel overlap information, and can help identify sources of interference like other access points or devices.

Why this answer

This question tests knowledge of wireless site survey tools. A Wi-Fi analyzer can measure signal strength, detect interference, and identify channel usage, making it ideal for diagnosing weak Wi-Fi in a specific area.

Full explanation →

362

MCQhard

A technician is installing a new server in a data center and needs to connect it to a 10GbE switch. The server has an SFP+ port, and the switch also has SFP+ ports. The technician has a selection of cables: Cat6a, Cat7, multimode fiber with LC connectors, and single-mode fiber with SC connectors. Which cable should the technician use?

A.Cat6a cable with RJ45 connectors.

B.Cat7 cable with RJ45 connectors.

C.Multimode fiber patch cable with LC connectors.

D.Single-mode fiber patch cable with SC connectors.

AnswerC

Multimode fiber with LC connectors is standard for SFP+ 10GbE connections in data centers, offering reliable performance.

Why this answer

This question tests knowledge of 10GbE connectivity options. The correct answer is multimode fiber with LC connectors, as SFP+ ports typically use fiber or DAC cables, and multimode fiber with LC is common for short-range 10GbE in data centers.

Full explanation →

363

MCQmedium

A user reports that their computer is connected to the network but cannot access any websites. The technician checks the IP configuration and sees an IP address of 169.254.1.5. What does this indicate?

A.The computer has a valid static IP address.

B.The DNS server is not responding.

C.The DHCP server is unavailable or the computer cannot reach it.

D.The network cable is unplugged.

AnswerC

APIPA is assigned when DHCP fails, so the computer cannot get a routable IP, preventing internet access.

Why this answer

An IP address in the 169.254.x.x range is an Automatic Private IP Addressing (APIPA) address, assigned when a DHCP server is unreachable. This means the computer failed to get a valid IP from DHCP, so it cannot communicate beyond the local link.

Full explanation →

364

MCQeasy

A customer complains that their LCD monitor has a persistent faint shadow of the previous image visible on the screen, even after changing applications. What is the most likely cause of this issue?

A.A failing backlight inverter

B.Image persistence due to static content

C.A damaged video cable

D.Incorrect color calibration settings

AnswerB

Prolonged display of static images can cause temporary or permanent ghosting on LCD panels.

Why this answer

This describes image persistence or burn-in, common in LCD panels left on static images for extended periods. Unlike dead pixels or backlight issues, this is a temporary or permanent ghosting of static content. The correct answer identifies the root cause as static image retention, which can sometimes be reversed with screen refreshers.

Full explanation →

365

MCQmedium

After updating the firmware on a workstation, the system fails to boot and displays a 'Boot Device Not Found' error. The hard drive is detected in UEFI settings. What is the most likely cause?

A.The hard drive has failed due to the update

B.Secure Boot is blocking the bootloader

C.The boot mode changed from Legacy to UEFI (or vice versa)

D.The CMOS battery needs replacement

AnswerC

A firmware update can reset the boot mode, making the existing partition table (MBR vs GPT) incompatible.

Why this answer

A firmware update can reset UEFI settings to defaults, including boot mode. If the drive was formatted for Legacy (CSM) but the system now defaults to UEFI, or vice versa, the bootloader won't be found. This tests understanding of boot mode compatibility.

Full explanation →

366

MCQeasy

A technician is configuring a company-issued Android tablet for a field worker. The worker needs to use a specific business app that requires location access to log job sites. What should the technician do to ensure the app works correctly?

A.Disable location services to save battery.

B.Grant the location permission when the app requests it.

C.Install a third-party location spoofing app.

D.Set the tablet to Airplane mode to prevent network interference.

AnswerB

Granting the required permission allows the app to access location data as needed.

Why this answer

This question tests understanding of mobile app permissions. For an app that needs location data to function, the technician must grant the location permission when prompted or via settings. Denying or ignoring the permission will prevent the app from accessing location services, leading to malfunction.

Full explanation →

367

MCQhard

A network administrator needs to connect two switches that are 200 meters apart. The connection must support 1 Gbps speed. The administrator has Cat5e cable available. However, Cat5e is only rated for 100 meters at 1 Gbps. Which device can be used to extend the distance without replacing the cable?

A.Media converter

B.Network extender (repeater)

C.PoE injector

D.Load balancer

AnswerB

A network extender regenerates the signal, allowing the 200-meter run to be broken into two segments within the 100-meter limit.

Why this answer

To extend Ethernet beyond 100 meters, a repeater or a network extender can regenerate the signal. A switch can also act as a repeater if placed in between, but the question implies using existing cable. A media converter changes media type but not distance.

The correct answer is a network extender or a repeater.

Full explanation →

368

MCQmedium

A user complains that their VoIP phone intermittently loses audio during calls. The phone is connected to a PoE switch. The technician checks the switch and sees that the port's PoE power budget is at 95% capacity. What is the most likely cause of the audio drops?

A.The Ethernet cable is too long, causing signal attenuation.

B.The VoIP phone is faulty and needs replacement.

C.The switch is power-cycling the phone due to PoE power budget constraints.

D.The switch port is configured with a VLAN mismatch.

AnswerC

When the PoE power budget is near capacity, the switch may prioritize power delivery and occasionally drop power to lower-priority devices, causing the phone to reset and drop audio.

Why this answer

This question tests understanding of Power over Ethernet (PoE) power budgeting. When a PoE switch's power budget is near capacity, it may intermittently power down low-priority devices to prevent overload, causing the phone to reset or lose power. The correct answer is that the switch is power-cycling the phone due to power budget constraints.

Full explanation →

369

MCQeasy

A small office has several desktop PCs that are experiencing intermittent blue screen errors, especially when running multiple applications. The IT support team suspects faulty RAM. Which tool should they use to test the memory modules?

A.Task Manager.

B.Windows Memory Diagnostic.

C.CHKDSK.

D.System Configuration (msconfig).

AnswerB

This tool is designed specifically to test RAM for errors and is built into Windows, making it a convenient choice for initial diagnosis.

Why this answer

Windows Memory Diagnostic is a built-in tool in Windows that performs a thorough test of installed RAM to detect errors. It can be run from the boot menu or within Windows and is the standard first step for diagnosing memory issues. Other tools like MemTest86 are also common, but Windows Memory Diagnostic is readily available without additional downloads.

Full explanation →

370

MCQeasy

A technician is troubleshooting a VM that fails to boot with an error 'Operating system not found'. The VM was just created from an ISO file. What is the most likely cause?

A.The ISO file is corrupted

B.The VM's boot order is set to hard disk first, and the hard disk is empty

C.The VM has insufficient RAM

D.The virtual hard disk is not attached

AnswerB

If the boot order prioritizes the hard disk over the CD/DVD, the VM tries to boot from an empty disk and fails.

Why this answer

The boot order in the VM's BIOS must be set to boot from the CD/DVD drive (ISO) before the hard disk. If the ISO is not mounted or boot order is wrong, the VM cannot find an OS.

Full explanation →

371

MCQeasy

A customer wants to install a modular power supply in their PC but notes that the included cables have different pin shapes on the PSU end. What should the technician advise?

A.The cables are interchangeable as long as they fit the connector.

B.The technician should verify the pinout diagram and use cables from the same manufacturer.

C.The technician should use only the cables that came with that specific power supply.

D.The customer should return the PSU and buy a non-modular one.

AnswerC

Modular cables are designed for that PSU model; mixing cables can cause electrical damage.

Why this answer

Modular PSU cables are keyed to prevent incorrect insertion, but they are not standardized across brands. Using cables from a different PSU can cause shorts and damage components. Always use the cables that came with the specific PSU.

Full explanation →

372

MCQmedium

A user wants to mirror their Android smartphone's screen to a smart TV that does not support Miracast. The TV has HDMI and USB ports. Which device should the technician recommend?

A.A USB-C to HDMI cable

B.A Bluetooth transmitter

C.A Chromecast device

D.An NFC tag

AnswerC

Chromecast plugs into HDMI and allows screen mirroring via Wi-Fi using the Google Cast protocol.

Why this answer

A Chromecast or similar streaming device plugs into HDMI and uses Wi-Fi to receive screen mirroring via Google Cast. Miracast is not supported by the TV, so an external device is needed.

Full explanation →

373

MCQeasy

A customer reports that their computer will not power on. The power supply fan does not spin, and the motherboard's power LED is off. You have verified the power cord and outlet are working. Which motherboard component is most likely causing this issue?

A.Faulty CMOS battery

B.Failed motherboard power-on circuit

C.Loose front panel power switch connector

D.Incorrect BIOS settings

AnswerB

A failed power-on circuit on the motherboard can prevent the PSU from receiving the signal to start, causing no power to the system.

Why this answer

The motherboard's power LED not lighting up and the PSU fan not spinning indicate a lack of standby power, which is typically supplied through the CMOS battery or the PSU itself. However, a failed CMOS battery can prevent the system from retaining BIOS settings, but it does not usually stop the PSU from providing standby power. The most common cause in this scenario is a failed power supply, but since the question focuses on the motherboard, a shorted motherboard or a failed power-on circuit is the likely culprit.

The correct answer is a failed motherboard power-on circuit, as it can prevent the PSU from turning on even if the PSU is functional.

Full explanation →

374

MCQeasy

A customer reports that their desktop computer, which is connected to the network via a wall jack, can access the internet but cannot see other computers on the same local network. The network uses a single switch and a router. What is the most likely misconfiguration causing this issue?

A.The switch is a hub, not a switch.

B.The computer's network profile is set to 'Public', disabling Network Discovery.

C.The router is blocking multicast traffic.

D.The Ethernet cable is a crossover cable.

AnswerB

In Windows, a Public network profile disables Network Discovery, preventing the computer from seeing other devices on the local network, even though internet access works.

Why this answer

This question tests understanding of the difference between a hub and a switch. A switch forwards frames based on MAC addresses and creates separate collision domains, but it does not inherently prevent devices from seeing each other on the same VLAN. The issue is likely that the switch ports are configured in separate VLANs, isolating traffic.

However, the most common simple misconfiguration is that the device is connected to a hub instead of a switch, which would cause collisions but not prevent visibility. The correct answer is that the switch is functioning correctly; the problem is likely that the computer's network profile is set to 'Public' instead of 'Private' in Windows, which enables Network Discovery.

Full explanation →

375

MCQhard

A technician is troubleshooting a PC that shuts down randomly after a few minutes of use. The technician measures the +12V rail with a multimeter and gets 11.2V. The +5V rail reads 4.9V, and the +3.3V rail reads 3.2V. What is the most likely diagnosis?

A.The motherboard voltage regulator is failing.

B.The power supply is failing and needs replacement.

C.The system is drawing too much current, causing voltage drop.

D.The AC input voltage is too low.

AnswerB

A +12V reading of 11.2V is below the ATX tolerance of 11.4V, indicating the PSU cannot maintain proper voltage, likely due to aging capacitors or other internal faults.

Why this answer

The +12V rail is significantly below the ATX specification of ±5% (11.4V minimum), indicating a failing power supply. The other rails are within tolerance but the +12V is critical for CPU and GPU power. A failing PSU can cause random shutdowns as voltage drops under load.

Replacement is necessary.

Full explanation →

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