Knowledge + Practice

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

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

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751

MCQhard

A technician is called to a home where the customer reports that their cable internet works fine, but the TV service has pixelated channels. The technician suspects a signal issue. What is the most appropriate tool to measure the signal strength and quality on the coaxial line?

A.A tone generator and probe

B.A multimeter

C.A cable tester (signal level meter)

D.An optical time-domain reflectometer (OTDR)

AnswerC

A cable tester designed for RF signals can measure signal strength and quality on coaxial lines.

Why this answer

A cable tester (specifically a signal level meter or spectrum analyzer) can measure signal strength, SNR, and other parameters on coaxial cables used for cable internet and TV. A tone generator is for tracing wires, a multimeter is for electrical measurements, and an OTDR is for fiber optic cables.

Full explanation →

752

MCQhard

A technician is setting up a small office network with a router, a switch, and a wireless access point. The router has only one LAN port. The technician needs to connect the switch and the WAP to the router, but the switch has no uplink port. Which hardware component should the technician use to connect both devices to the router?

A.Use a crossover cable to connect the router directly to the WAP.

B.Connect the router to the switch, then connect the WAP to the switch.

C.Use a hub between the router and the switch.

D.Configure the switch as a router to connect to the WAP.

AnswerB

A switch expands the number of ports, allowing both the WAP and other devices to connect to the router through a single link.

Why this answer

This question tests knowledge of network topology and the use of additional switches. Since the router has only one LAN port, a switch is needed to expand the number of available ports. The correct answer is to connect the router to the switch, and then connect the WAP to the switch.

The switch's ports are typically all the same, so no special uplink port is required (modern switches use Auto-MDIX).

Full explanation →

753

MCQmedium

A user reports that their computer is running very slowly and they hear a repetitive clicking sound from the case. The technician checks the SMART status of the primary hard drive and sees a 'Reallocated Sectors Count' value that is critically high. What should the technician do next?

A.Run a disk defragmentation to improve performance.

B.Back up all important data immediately.

C.Replace the SATA cable and power connector.

D.Disable the paging file to reduce disk activity.

AnswerB

The high reallocated sectors count is a strong indicator of impending drive failure. Backing up data is the critical first step to prevent data loss.

Why this answer

A high reallocated sectors count indicates the drive is failing and likely to suffer data loss. The priority is to back up critical data immediately, then replace the drive. Continuing to use the drive risks permanent data loss.

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754

MCQhard

A technician is deploying tablets for use in a warehouse where workers wear gloves. The tablets need to be used for scanning barcodes and entering data. Which accessory is most critical for this environment?

A.A screen protector.

B.A Bluetooth keyboard.

C.A rugged case.

D.A capacitive stylus.

AnswerC

A rugged case provides drop protection and seals against dust, which is critical in a warehouse environment where tablets may be dropped or exposed to debris.

Why this answer

A rugged case protects against drops and dust, which is common in warehouses. A capacitive stylus can be used with gloves, but a rugged case is more critical for durability. The correct answer is a rugged case.

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755

MCQmedium

A user has a 27-inch 1440p monitor connected via DisplayPort. They report that text appears slightly blurry and images look less sharp than expected. The monitor's native resolution is set correctly in Windows. What should you check first?

A.Replace the DisplayPort cable with an HDMI cable.

B.Adjust the monitor's sharpness setting from the on-screen display (OSD) menu.

C.Enable and recalibrate ClearType in Windows.

D.Set the monitor to a lower resolution to see if text improves.

AnswerC

ClearType is specifically designed to improve text clarity on LCD screens; disabling it causes blurriness.

Why this answer

Blurry text at the correct native resolution often means ClearType (Windows font smoothing) is disabled or misconfigured. ClearType improves text clarity on LCD monitors by sub-pixel rendering. Enabling or recalibrating ClearType in Control Panel typically resolves the issue.

Full explanation →

756

MCQeasy

During a desktop build, you install a new M.2 NVMe SSD into the M.2 slot. When you power on the system, the BIOS does not detect the drive. The SSD is known to be working. What is the most likely motherboard-related cause?

A.The M.2 slot is SATA-only and the drive is NVMe

B.The CMOS battery needs replacement

C.The motherboard BIOS is corrupted

D.The CPU is not seated properly

AnswerA

Some M.2 slots only support SATA protocol; an NVMe drive will not be detected in such a slot.

Why this answer

Many motherboards share PCIe lanes between M.2 slots and SATA ports. Installing an M.2 NVMe drive often disables certain SATA ports, but the drive itself should still be detected if properly seated. The most common oversight is not checking the motherboard manual for M.2 slot compatibility or lane sharing.

Full explanation →

757

MCQmedium

A user reports that they cannot access a website hosted on a remote server. The technician finds that the firewall allows HTTP and HTTPS traffic, but the website uses a non-standard port. The user's browser shows 'connection refused'. Which tool can the technician use to verify if the remote port is open?

A.Ping

B.Telnet

C.Nslookup

D.Tracert

AnswerB

Telnet can connect to a specific port to verify if it is open and listening.

Why this answer

Telnet can be used to test connectivity to a specific port (e.g., telnet example.com 8080). Ping uses ICMP, not TCP ports. Nslookup tests DNS resolution.

Tracert traces the route but does not test port status.

Full explanation →

758

MCQhard

A technician is tasked with connecting a legacy parallel port printer to a modern motherboard that lacks a parallel port header. The motherboard has an LPT header (25-pin) but it is not populated with a bracket. What is the best way to add a parallel port?

A.Install a USB-to-parallel adapter

B.Use a PCIe parallel port expansion card

C.Purchase an LPT bracket that connects to the motherboard header

D.Solder wires directly to the motherboard's LPT header pins

AnswerC

This bracket provides the physical port using the motherboard's built-in parallel port header, which is the most direct and cost-effective solution.

Why this answer

The LPT header on the motherboard provides the necessary signals for a parallel port. A bracket with a ribbon cable that connects to this header is the correct solution. A USB-to-parallel adapter would work but may have compatibility issues and is not the best use of the existing header.

A PCIe parallel card is an alternative but unnecessary if the header is present.

Full explanation →

759

MCQmedium

During a motherboard replacement, a technician installs a new CPU but the system fails to POST. The CPU fan spins, but the screen remains blank. Which of the following should the technician check first?

A.Check if the CPU power connector is plugged in

B.Reseat the RAM modules

C.Verify the CPU is on the motherboard's supported CPU list and update BIOS if needed

D.Replace the CMOS battery

AnswerC

Many motherboards require a BIOS update to support newer CPUs; checking compatibility is the first logical step.

Why this answer

When a system fails to POST with a new CPU, the most common issue is compatibility or improper installation. The technician should verify the CPU is supported by the motherboard's BIOS version.

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760

MCQeasy

A technician is setting up a new multifunction printer for a department. The device supports duplex printing, but the driver installation wizard does not show the duplex option. Users need to print on both sides of the paper. What should the technician do first?

A.Update the printer firmware to the latest version.

B.Check if the duplex unit is installed and properly connected.

C.Reinstall the printer driver using the manufacturer's full driver package.

D.Configure the duplex setting in the printer's web interface.

AnswerB

If the duplex unit is not physically installed or connected, the driver will not show the duplex option. This is the first step in troubleshooting.

Why this answer

The duplex unit is often a separate accessory that must be physically installed and enabled in the driver. The most logical first step is to verify the hardware is present and properly connected, as the driver may not detect it automatically.

Full explanation →

761

MCQeasy

A customer reports that their new all-in-one printer can scan and copy locally, but they cannot send scanned documents to their email address. The printer is connected to the office network and can ping other devices. Which protocol is most likely misconfigured on the printer?

A.FTP

B.IMAP

C.SMTP

D.SNMP

AnswerC

SMTP is the protocol used to send outgoing email, making it the likely misconfigured protocol here.

Why this answer

The scenario describes a printer that can perform local functions but fails to send scanned documents via email, which typically uses SMTP (Simple Mail Transfer Protocol) for outgoing mail. Since the printer can ping other devices, basic network connectivity is working, pointing to a higher-layer protocol issue. SMTP is the standard protocol for sending email, so its misconfiguration would prevent email delivery.

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762

MCQmedium

A technician is replacing a power supply in a server that has been experiencing random lockups. The old PSU is an 80+ Bronze rated 650W unit. The technician selects an 80+ Gold rated 650W unit from the same brand. What is the primary benefit of this upgrade?

A.The Gold-rated PSU provides more wattage to the components.

B.The Gold-rated PSU produces less heat and is more efficient.

C.The Gold-rated PSU has better voltage regulation and ripple suppression.

D.The Gold-rated PSU will automatically fix the random lockups.

AnswerB

Higher efficiency means less energy is lost as heat, which improves thermal performance and may reduce fan noise.

Why this answer

80+ Gold certification indicates higher efficiency (87-90% at typical loads) compared to Bronze (82-85%). This means less power is wasted as heat, which can improve reliability in a server environment and reduce cooling costs.

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763

MCQeasy

A customer complains that their external USB hard drive is not recognized when plugged into any port on their laptop. The drive spins up and its LED lights up. The drive works fine on another computer. What is the most likely issue?

A.The USB port is physically damaged.

B.The external drive's enclosure has a faulty controller board.

C.The laptop is missing or has corrupted USB mass storage drivers.

D.The USB cable is defective.

AnswerC

If the USB mass storage driver is missing or corrupted, the laptop will provide power to the device but will not be able to enumerate it, so it will not appear in the OS. This explains why the drive spins up but is not recognized.

Why this answer

This question tests basic USB troubleshooting. The drive spins up and lights up, indicating power is reaching it, but it is not recognized. This often points to a driver issue on the laptop.

The other options are less likely because the drive works on another computer and the LED is on.

Full explanation →

764

MCQeasy

A customer reports that their laptop can connect to the internet at home via Wi-Fi, but at a coffee shop it cannot connect to the guest network. They have not changed any settings. Which network type is most likely causing this issue?

A.Personal Area Network (PAN)

B.Local Area Network (LAN)

C.Wide Area Network (WAN)

D.Metropolitan Area Network (MAN)

AnswerB

The coffee shop's guest Wi-Fi is a LAN that the laptop is trying to join; the issue is likely with that LAN's configuration, not the internet (WAN).

Why this answer

A PAN is a short-range network for personal devices like Bluetooth, and a LAN is a local network. A WAN is the internet itself. The issue is that the coffee shop's network may require a different authentication method, but the question is about network types: the laptop is trying to connect to a different LAN (the coffee shop's) than its home LAN.

The correct answer is LAN because the coffee shop's guest network is a separate local area network.

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765

MCQhard

A technician is troubleshooting a smartphone that cannot connect to any Wi-Fi network. The technician has already verified that the device's Wi-Fi adapter is enabled and that other devices can connect to the same networks. What should the technician check next?

A.Check if the device has a static IP address configured.

B.Check the device's MAC address filter on the router.

C.Check if the device's date and time are correct.

D.Check if the device's Bluetooth is interfering.

AnswerA

A static IP that is incorrect or conflicts with other devices can prevent Wi-Fi connectivity. The technician should check the IP settings in the Wi-Fi configuration.

Why this answer

A static IP address can prevent a device from obtaining a valid IP from the DHCP server, causing connection failure. This is a common issue when a device has been manually configured with an IP that is not in the network's range or is already in use.

Full explanation →

766

MCQmedium

A user reports that their laptop screen flickers intermittently, especially when the lid is moved. The flickering stops when an external monitor is connected. What is the most likely cause?

A.The graphics driver is outdated.

B.The inverter board is failing.

C.The display cable is loose or damaged.

D.The LCD panel is failing.

AnswerC

Movement of the lid stresses the internal display cable. A loose or damaged connection causes flickering only on the built-in screen.

Why this answer

Intermittent flickering when moving the lid points to a loose or damaged display cable (LVDS or eDP) connecting the motherboard to the screen. The external monitor works because it bypasses this internal connection.

Full explanation →

767

MCQmedium

A user's smartphone intermittently disconnects from a known Wi-Fi network when they move to a different room. The network uses a single access point. What is the most likely cause?

A.The smartphone is connecting to the 5 GHz band, which has poor wall penetration.

B.The access point is overloaded with too many clients.

C.The smartphone's MAC address is being filtered.

D.The smartphone's battery saver mode is turning off Wi-Fi.

AnswerA

5 GHz has shorter range and is more easily blocked by walls, leading to intermittent disconnects when moving rooms.

Why this answer

This tests understanding of Wi-Fi signal propagation. 5 GHz signals attenuate quickly through walls and obstacles, causing disconnections when moving away from the access point, while 2.4 GHz has better range.

Full explanation →

768

MCQhard

A user reports that their cloud-based application is running slowly, and the IT team discovers that the application is hosted in a different geographic region than the user. Which cloud concept is most directly affecting performance?

A.Bandwidth

B.Elasticity

C.Latency

D.Fault tolerance

AnswerC

Latency is the delay in data transmission, which increases with geographic distance between user and cloud server.

Why this answer

This scenario tests understanding of latency in a global cloud context. When an application is hosted far from the user, the physical distance increases network latency, causing slow performance. Bandwidth could be a factor but is not directly tied to geographic distance, while elasticity and fault tolerance are unrelated to the location of the host.

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769

MCQmedium

A technician is deploying 50 company-owned Android tablets for field workers. The tablets must only run a single custom business app and prevent users from accessing any other apps or settings. Which configuration method should the technician use?

A.Enable 'Developer options' and set the app as the default launcher.

B.Use a Mobile Device Management (MDM) solution to configure kiosk mode.

C.Perform a factory reset and install only the custom app.

D.Remove the Google Play Store app from the device.

AnswerB

Correct. MDM can enforce kiosk mode, locking the device to a single app and blocking other functions.

Why this answer

This question covers Android enterprise deployment and kiosk mode. Kiosk mode (or single-app mode) is designed to lock a device to one app, ideal for dedicated-use devices. Factory reset or standard settings cannot achieve this level of restriction.

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770

MCQmedium

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

A.The 5 GHz router is too far from the laptop.

B.The laptop's Wi-Fi driver is outdated or misconfigured for 5 GHz.

C.The 5 GHz network is using WEP encryption.

D.The laptop's Wi-Fi card is only 2.4 GHz capable.

AnswerB

An outdated driver may not properly support 5 GHz channels or band steering, causing connection failures.

Why this answer

This tests knowledge of Wi-Fi standards and configuration. Even if a device supports dual-band, the driver or software may be set to prefer 2.4 GHz, or the 5 GHz channel may be set to a region-specific channel the laptop does not support.

Full explanation →

771

MCQmedium

A technician is troubleshooting a network drop that was working yesterday but now has no link light at the switch. The cable run is 80 meters and passes through a conduit. Which tool should be used first to isolate the problem?

A.A tone generator and probe.

B.A multimeter.

C.A cable tester.

D.A time-domain reflectometer (TDR).

AnswerC

A cable tester can check for continuity, shorts, and wiring faults, which is the first step in diagnosing a no-link issue.

Why this answer

This question tests the use of basic cable testing tools in a troubleshooting scenario. A cable tester can quickly identify faults like breaks, shorts, or miswiring. The correct answer prioritizes the most direct tool for the symptom.

Full explanation →

772

MCQhard

A technician is troubleshooting a slow network connection for a user. The user's computer has an IP address of 192.168.1.100, subnet mask 255.255.255.0, and default gateway 192.168.1.1. The technician runs a ping to the gateway and gets replies with times around 2ms. However, pinging a server at 192.168.1.200 results in times over 500ms. The technician checks the switch and finds that the port for the user's computer is set to 10 Mbps half-duplex, while the computer's NIC is set to auto-negotiation. What is the most likely cause of the high latency?

A.The server at 192.168.1.200 is overloaded.

B.The user's computer has a faulty network cable.

C.There is a duplex mismatch between the switch port and the NIC.

D.The default gateway is misconfigured.

AnswerC

The switch port is set to 10 Mbps half-duplex, while the NIC is auto-negotiating. This often results in a mismatch where the NIC runs at half-duplex, causing collisions and high latency.

Why this answer

A mismatch in duplex and speed settings between the switch port and the NIC can cause performance issues. When one side is set to a fixed speed/duplex and the other is set to auto-negotiation, the auto side may fail to negotiate correctly, often resulting in half-duplex operation and high error rates, leading to high latency. The switch port is manually set to 10 Mbps half-duplex, while the NIC is auto-negotiating, likely resulting in a mismatch.

Full explanation →

773

MCQeasy

You are upgrading a customer's gaming PC to support faster memory. The motherboard supports DDR4-3200, but after installing two 8GB DDR4-3200 modules, the system only runs at 2133 MHz. What is the most likely reason?

A.The RAM modules are defective

B.The motherboard does not support dual-channel memory

C.XMP is not enabled in the BIOS

D.The CPU does not support DDR4-3200

AnswerC

XMP must be enabled to run RAM above the default JEDEC speed; this is a common configuration step.

Why this answer

By default, most motherboards run RAM at a standard JEDEC speed (often 2133 MHz) for stability. To achieve the rated speed of 3200 MHz, you must enable XMP (Extreme Memory Profile) in the BIOS. This is a common step that new builders overlook.

Full explanation →

774

MCQhard

A technician is setting up a mobile workstation for a graphic designer who uses a laptop with a USB-C port that supports Thunderbolt 3. The designer needs to connect two 4K monitors, a wired Ethernet connection, and charge the laptop simultaneously. Which accessory should the technician choose?

A.A USB-C to dual HDMI adapter

B.A Thunderbolt 3 docking station

C.A USB 3.0 hub with HDMI and Ethernet

D.A KVM switch

AnswerB

Thunderbolt 3 docks offer high bandwidth, dual 4K support, Ethernet, and power delivery, meeting all requirements.

Why this answer

A Thunderbolt 3 docking station provides high bandwidth (40 Gbps) to support dual 4K displays, Ethernet, and power delivery over a single cable. A USB-C hub may not have enough bandwidth for dual 4K output, and a USB-C to HDMI adapter alone cannot provide Ethernet or charging. A KVM switch is for sharing peripherals between computers, not for this purpose.

Full explanation →

775

MCQhard

A technician is troubleshooting an impact printer that is producing faint characters on multipart forms. The ribbon is new, and the print head is clean. The forms are properly aligned. Which adjustment should be made?

A.Increase the print head temperature

B.Replace the platen

C.Adjust the platen gap to bring the print head closer to the paper

D.Change the paper thickness setting to a thicker setting

AnswerC

Reducing the gap increases the force of the pins on the paper, ensuring clear impressions through all layers of the multipart form.

Why this answer

Faint characters on multipart forms with a new ribbon and clean print head indicate insufficient impact force. Impact printers have a platen gap adjustment that controls the distance between the print head and the platen. If the gap is too wide, the pins cannot strike through all layers effectively.

Full explanation →

776

MCQhard

A technician is configuring a network for a new branch office. The branch has 50 users and needs to access resources at the main office via a secure tunnel over the internet. Which service is required to establish this connection?

A.DHCP

B.DNS

C.VPN

D.NAT

AnswerC

VPN creates an encrypted tunnel over the internet for secure communication between sites.

Why this answer

This question tests understanding of VPNs. A VPN creates an encrypted tunnel over the internet, allowing branch users to securely access main office resources. DHCP, DNS, and NAT are not sufficient for creating a secure site-to-site connection.

Full explanation →

777

MCQeasy

A user reports that their desktop PC emits a series of short beeps and fails to boot. The monitor shows no display, and the keyboard and mouse LEDs are off. What is the most likely cause?

A.Faulty power supply unit

B.Loose or faulty RAM module

C.Defective hard drive

D.Overheated CPU

AnswerB

Short beep patterns are a standard BIOS indicator for memory errors, and reseating or replacing RAM often resolves the issue.

Why this answer

A series of short beeps during POST typically indicates a memory (RAM) failure. The lack of display and peripheral response points to a hardware fault that prevents the system from completing POST, and RAM is the most common culprit.

Full explanation →

778

MCQmedium

A technician is configuring a cloud-based backup solution for a client's critical data. The client requires that data be stored in a way that allows quick recovery of individual files from any point in the last 30 days. Which cloud storage model is most appropriate?

A.Block storage

B.File storage

C.Object storage

D.Cold storage

AnswerC

Object storage stores data as objects with metadata and supports versioning, allowing recovery of previous file versions.

Why this answer

Object storage is ideal for storing and retrieving individual files with versioning capabilities, enabling point-in-time recovery. It is scalable and commonly used for backup. Block storage is for raw volumes, and file storage is for shared file systems, but object storage offers the best granularity for file-level recovery over time.

Full explanation →

779

MCQmedium

A user complains that a virtual machine running on a laptop shuts down unexpectedly when the laptop is unplugged from power. The host has power management settings set to 'Balanced'. What is the most likely cause?

A.The VM's virtual BIOS is set to power off on AC loss

B.The host's power plan is set to 'Balanced', causing the host to sleep when unplugged

C.The VM is configured with insufficient RAM

D.The laptop's battery is failing and cannot supply power

AnswerB

A 'Balanced' power plan may put the host to sleep after a period on battery, which shuts down the VM abruptly.

Why this answer

Power management settings can put the host to sleep or reduce performance, causing the VM to crash or shut down. The VM relies on the host's power state; changing the plan to 'High Performance' prevents sleep.

Full explanation →

780

MCQmedium

A small office has a single public IP address and uses a router to provide internet access to 20 devices. Users report that some websites load slowly or time out, while others work fine. The router's NAT table shows many entries. Which protocol is most likely being exhausted, causing these intermittent issues?

A.DNS

B.DHCP

C.NAT

D.ICMP

AnswerC

NAT table exhaustion prevents new outbound connections, causing timeouts for some sites while others work.

Why this answer

NAT (Network Address Translation) uses a translation table to map private IPs to a public IP. If the table fills up due to many simultaneous connections, new connections may fail or time out. This is a common issue in small offices with limited NAT resources, leading to intermittent access problems.

Full explanation →

781

MCQmedium

A user reports that their VoIP phone works but the connected PC cannot access the network. The phone is connected to the wall jack, and the PC is connected to the phone's passthrough port. What is the most likely cause?

A.The PC's network cable is faulty.

B.The VoIP phone's passthrough port is disabled.

C.The switch port is not configured for the data VLAN, so the PC cannot get an IP address.

D.The PC's network adapter is set to a static IP address that conflicts with the phone.

AnswerC

Correct. VoIP phones often use separate VLANs. If the switch port only allows the voice VLAN, the PC's traffic is blocked. Configuring the port for both VLANs resolves this.

Why this answer

This question tests understanding of VoIP phone pass-through ports and VLAN configuration. Many VoIP phones use a separate VLAN for voice and data. If the switch port is not configured for the data VLAN, the PC will not get network access.

Full explanation →

782

MCQmedium

A customer complains that their VoIP phone intermittently drops calls. A technician checks the network and finds high latency and jitter during peak hours. Which network service should be configured to prioritize VoIP traffic?

A.DHCP

B.QoS

C.DNS

D.VPN

AnswerB

QoS prioritizes VoIP traffic to maintain call quality by reducing latency and jitter.

Why this answer

Quality of Service (QoS) is used to prioritize time-sensitive traffic like VoIP, reducing latency and jitter during congestion. DHCP assigns IPs, DNS resolves names, and VPN encrypts traffic but none prioritize packets. QoS markings (e.g., DSCP) ensure voice packets are handled first.

Full explanation →

783

MCQhard

A network administrator is designing a new subnet scheme for a company with 4 departments: Sales (50 devices), HR (25 devices), IT (10 devices), and Management (5 devices). The company uses the 10.0.0.0/8 network. To minimize wasted IP addresses, which subnet mask should be used for the Sales department?

A.255.255.255.0

B.255.255.255.192

C.255.255.255.224

D.255.255.255.240

AnswerB

A /26 subnet provides 62 usable hosts, which is sufficient for 50 devices and minimizes waste.

Why this answer

To accommodate 50 devices, you need at least 52 usable addresses (50 + 2 for network and broadcast). A /26 subnet mask (255.255.255.192) provides 62 usable hosts, which is the smallest subnet that can support 50 devices without wasting many addresses.

Full explanation →

784

MCQhard

A technician is troubleshooting a server that uses a RAID 6 array with six 4 TB HDDs. One drive fails, and after replacement, the rebuild process is taking much longer than expected. The array is still online. What is the most likely reason for the slow rebuild?

A.The replacement drive is of a different RPM.

B.The RAID controller is faulty.

C.The array is performing background consistency checks.

D.The large capacity of the drives and the double parity overhead are causing the slow rebuild.

AnswerD

RAID 6's double parity and the large 4 TB drives mean the rebuild must read all remaining drives and write parity, which is I/O intensive and slow.

Why this answer

RAID 6 uses double parity, requiring more calculations during rebuild. Additionally, large-capacity drives (4 TB) take longer to rebuild because the entire drive surface must be read and written. The rebuild process also competes with normal I/O, slowing it further.

Full explanation →

785

MCQeasy

A user is setting up a new monitor that uses a DisplayPort connection, but their desktop PC only has an HDMI port. They have an adapter. Which adapter type will allow the monitor to display correctly?

A.HDMI to VGA adapter

B.HDMI to DisplayPort adapter

C.DisplayPort to USB-C adapter

D.DVI to HDMI adapter

AnswerB

HDMI and DisplayPort use similar digital signaling, so a passive adapter can convert the signal for the monitor.

Why this answer

The correct answer is B because DisplayPort and HDMI are both digital video standards, and a passive adapter can convert between them without signal loss. This tests knowledge that DisplayPort and HDMI are electrically compatible for video, unlike VGA (analog) or USB-C (which may require active conversion).

Full explanation →

786

MCQhard

A company needs to deploy a virtualized environment where each VM must be isolated from others for security reasons, but all VMs share the same physical network. Which virtual networking configuration should be used?

A.Use a virtual switch with port groups assigned to different VLANs

B.Configure each VM with a different MAC address

C.Use bridged networking for all VMs

D.Assign each VM a static IP address from a different subnet

AnswerA

VLAN tagging on virtual switch port groups isolates traffic between VMs while sharing the same physical interface.

Why this answer

VLANs provide network isolation at Layer 2, allowing VMs on the same physical network to be separated logically. This is a common security practice in virtualized environments.

Full explanation →

787

MCQmedium

A user reports that they can receive emails but cannot send any. The email client is configured with SMTP on port 25. The IT team confirms that port 25 is blocked by the ISP. Which alternative port should be used for SMTP submission?

A.Port 110

B.Port 143

C.Port 587

D.Port 993

AnswerC

Port 587 is the standard SMTP submission port, often allowed by ISPs.

Why this answer

Many ISPs block port 25 to prevent spam. Port 587 is the standard SMTP submission port that is often unblocked. Port 110 is for POP3, port 143 for IMAP, and port 993 for IMAPS.

Using port 587 allows sending email when port 25 is blocked.

Full explanation →

788

MCQmedium

A user reports that their external monitor connected to a laptop via HDMI flickers intermittently. The laptop's built-in display works fine. You have tried a different HDMI cable and a different monitor, but the flickering persists. What should you check next?

A.Update the graphics driver to the latest version.

B.Replace the video cable with a DisplayPort cable.

C.Inspect the HDMI port on the laptop for physical damage or debris.

D.Disable the laptop's built-in display to force the external monitor as primary.

AnswerC

A damaged or dirty port can cause intermittent connections; cleaning or replacing the port is the logical next step.

Why this answer

The issue is isolated to the external monitor connection, and swapping cable and monitor didn't help. This points to a defective or loose HDMI port on the laptop, which can cause intermittent signal loss. Testing with a known-good display on a different port or device confirms the port as the root cause.

Full explanation →

789

MCQeasy

A customer reports that their laptop can connect to the internet via a wired connection but cannot access any network shares or printers by hostname. They can ping the IP address of the file server. Which network service is most likely misconfigured?

A.DHCP

B.DNS

C.NAT

D.ARP

AnswerB

DNS resolves hostnames to IP addresses. Since the customer can access resources by IP but not by hostname, DNS is misconfigured or not resolving local names.

Why this answer

This scenario describes a failure in name resolution for local network resources. DNS translates hostnames to IP addresses; since the customer can ping by IP but not by name, the DNS service is the likely culprit. DHCP provides IP configuration, not name resolution, and ARP resolves IP to MAC addresses.

Full explanation →

790

MCQmedium

During a routine hardware upgrade, you need to replace a power supply in a desktop that has a non-modular PSU. After disconnecting all cables, you notice the old PSU has a 20+4 pin main connector, but the new PSU has a 24-pin main connector. The motherboard has a 24-pin socket. What should you do?

A.Use the 20+4 pin connector from the old PSU on the new motherboard

B.Connect the new PSU's 24-pin connector directly to the motherboard

C.Remove the 4-pin section from the new PSU's 24-pin connector to make it 20-pin

D.Use a 24-pin to 20-pin adapter

AnswerB

The 24-pin connector is designed for modern motherboards and will fit securely, providing proper power.

Why this answer

A 24-pin connector is compatible with a 24-pin motherboard socket; the extra 4 pins are integrated. The 20+4 pin design was for backward compatibility with older 20-pin boards. No adapter is needed.

Full explanation →

791

MCQeasy

A user is setting up a new tablet and wants to share its internet connection with a laptop that has no cellular capability. The tablet has a cellular data plan. Which configuration should the user enable on the tablet?

A.Enable Bluetooth pairing only.

B.Enable Wi-Fi hotspot.

C.Enable airplane mode.

D.Enable NFC.

AnswerB

A Wi-Fi hotspot (tethering) creates a local Wi-Fi network that the laptop can join to use the tablet's cellular data connection.

Why this answer

Tethering allows a mobile device to share its cellular internet connection with other devices via Wi-Fi, Bluetooth, or USB. This is the standard method for providing internet access to a non-cellular laptop.

Full explanation →

792

MCQmedium

A technician is troubleshooting a desktop that fails to boot and displays 'No bootable device' after a power outage. The system has a single SATA SSD for the OS and a separate HDD for data. The BIOS detects both drives. What should the technician check first?

A.Replace the SATA cable for the SSD.

B.Check the boot order in BIOS/UEFI.

C.Run a CHKDSK on the HDD.

D.Replace the CMOS battery.

AnswerB

Correct. Power outages can reset BIOS settings, so the boot order may need to be corrected to prioritize the SSD.

Why this answer

After a power outage, the boot order in BIOS can reset to defaults, causing the system to try booting from the wrong drive. This tests understanding of BIOS/UEFI boot settings.

Full explanation →

793

MCQhard

A company plans to migrate a physical server running a legacy application to a virtual machine to reduce hardware costs. The application requires direct access to a proprietary PCIe card installed in the physical server. Which virtualization feature must the hypervisor support to allow the VM to use this card?

A.Virtual machine snapshots

B.Virtual switch VLAN tagging

C.PCI passthrough (VT-d/IOMMU)

D.Virtual machine migration (vMotion)

AnswerC

PCI passthrough allows a VM to directly use a physical PCIe device, which is essential for the proprietary card.

Why this answer

Direct access to physical hardware like a PCIe card requires hardware passthrough technology, such as Intel VT-d or AMD IOMMU. This allows a VM to directly control the device without going through the hypervisor. The correct answer tests knowledge of advanced virtualization features for hardware compatibility.

Full explanation →

794

MCQeasy

A customer brings in a smartphone with a cracked glass digitizer that still responds to touch, but the LCD underneath is intact. They want the cheapest repair that restores full functionality. Which component should you replace?

A.Replace the entire screen assembly (LCD + digitizer).

B.Replace only the LCD panel.

C.Replace only the digitizer.

D.Apply a glass screen protector and ignore the crack.

AnswerC

The digitizer is the damaged part; replacing it restores touch functionality at the lowest cost.

Why this answer

This question tests knowledge of mobile device component layers and repair options. The digitizer is the touch-sensitive layer; if it's cracked but the LCD is fine, replacing just the digitizer is the most cost-effective solution. Replacing the entire screen assembly would be more expensive and unnecessary.

Full explanation →

795

MCQeasy

A small office has a multifunction printer that supports duplex printing. Users complain that when they select 'Print on Both Sides' from their application, the printer still prints single-sided. The printer driver is installed correctly. What should you check first?

A.Ensure the printer has enough paper in the tray.

B.Check the printer driver's default duplex setting and change it to 'Print on Both Sides'.

C.Replace the network cable.

D.Update the printer firmware to the latest version.

AnswerB

If the driver default is set to single-sided, it will override the application's duplex selection.

Why this answer

This scenario tests understanding of printer driver settings vs. application settings. Duplex printing must be enabled in both the printer driver properties and the application's print dialog. The driver default setting often overrides application choices if not set properly.

Full explanation →

796

MCQhard

A technician is deploying a new network in a warehouse and needs to measure the length of a spool of Cat6a cable before installation to ensure it does not exceed the 100-meter segment limit. Which tool should be used?

A.Multimeter

B.Cable tester

C.TDR (Time-Domain Reflectometer)

D.Tone generator

AnswerC

A TDR is specifically designed to measure cable length by analyzing signal reflections, making it ideal for this task.

Why this answer

A time-domain reflectometer (TDR) sends a pulse down the cable and measures the time it takes to reflect back, calculating the length accurately. This is essential for verifying cable runs stay within specification before installation.

Full explanation →

797

MCQmedium

A technician is configuring a RAID 5 array with three 2 TB hard drives for a small office server. After installation, the array is not recognized by the RAID controller. The drives spin up and are detected individually. What is the most likely oversight?

A.The drives are not compatible with RAID 5.

B.The RAID array has not been initialized.

C.The SATA cables are faulty.

D.The power supply is insufficient.

AnswerB

After physically connecting drives, the array must be created and initialized in the RAID controller's utility before the OS can see it.

Why this answer

RAID 5 requires a minimum of three drives. The drives are detected individually, so the issue is with the RAID configuration itself. The most common oversight is failing to initialize the array in the RAID controller BIOS.

Full explanation →

798

MCQmedium

A user reports that their computer will not boot and displays an 'Operating System Not Found' error. They recently installed a new SATA SSD and connected it to the motherboard. What is the most likely cause?

A.The SATA cable is faulty.

B.The SSD is not compatible with the motherboard.

C.The boot order in BIOS is not set to the new SSD.

D.The SSD needs to be formatted before use.

AnswerC

If the system tries to boot from an old drive or network, it will fail if the OS is only on the new SSD.

Why this answer

If the boot order is not set to the new SSD, the system may try to boot from another drive or nothing, causing the error. The SSD itself is likely fine, and cables are usually detected if properly connected.

Full explanation →

799

MCQmedium

A technician is setting up a new branch office and needs to assign IPs to 30 devices. The ISP provided a public IP block of 203.0.113.0/28. The technician decides to use private IPs internally and NAT. Which of the following is the most appropriate private IP range for this network?

A.203.0.113.1 to 203.0.113.14

B.10.0.0.0/8

C.192.168.1.0/24

D.172.16.0.0/12

AnswerC

192.168.1.0/24 is a private range that provides 254 usable addresses, ideal for a small office with 30 devices.

Why this answer

For a small network with 30 devices, a /24 subnet (e.g., 192.168.1.0/24) provides 254 usable addresses, which is sufficient. The /28 public block is for the WAN interface. This tests knowledge of private IP ranges (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16) and subnet sizing.

Full explanation →

800

MCQhard

A user reports that a VM running Linux suddenly displays a 'Kernel Panic' error after the technician applied a snapshot and then reverted to it. The snapshot was taken while the VM was running. What is the most likely cause of the kernel panic?

A.The snapshot file became corrupted due to insufficient disk space.

B.The VM’s virtual disk was configured as thin provisioned and ran out of space.

C.The snapshot captured the VM in a state where the file system was inconsistent (e.g., during a write operation).

D.The hypervisor’s time synchronization caused a clock skew.

AnswerC

Reverting to a snapshot taken while the VM was running can restore an inconsistent file system state, leading to a kernel panic on boot.

Why this answer

Taking a snapshot of a running VM captures the state of the virtual disk and memory, but if the file system is in an inconsistent state (e.g., during a write operation), reverting to that snapshot can cause corruption. The correct answer identifies that the snapshot was taken at an inopportune time, leading to file system inconsistency.

Full explanation →

801

MCQmedium

A company has a network with multiple VLANs. A user in VLAN 10 cannot access a server in VLAN 20, but other users in VLAN 10 can access the server. The technician checks the switch configuration and finds that the port for the user is set to access mode for VLAN 10. What should be configured to allow this user to reach the server?

A.Change the user's port to trunk mode

B.Configure a static route on the user's computer

C.Enable inter-VLAN routing on the router or Layer 3 switch

D.Assign the user's port to VLAN 20

AnswerC

Inter-VLAN routing allows traffic to pass between different VLANs; without it, devices in separate VLANs cannot communicate.

Why this answer

This question tests understanding of VLAN routing. Devices in different VLANs require a router or Layer 3 switch to communicate. The access port is correctly configured for VLAN 10, but inter-VLAN routing must be enabled on the router or switch.

Full explanation →

802

MCQeasy

A customer reports that their new laptop cannot connect to the internet at a coffee shop, but their smartphone works fine. The technician checks the laptop's network settings and sees the Wi-Fi adapter is enabled and connected to the correct SSID. Which protocol is most likely not configured correctly on the laptop?

A.DNS

B.DHCP

C.HTTP

D.ARP

AnswerB

DHCP automatically assigns IP configuration; if the laptop's DHCP client is disabled or misconfigured, it won't get a usable IP address, causing no internet.

Why this answer

This scenario tests knowledge of the DHCP protocol, which automatically assigns IP addresses, subnet masks, gateways, and DNS servers. Without a properly configured DHCP client, the laptop may connect to the Wi-Fi but fail to obtain a valid IP address, preventing internet access.

Full explanation →

803

MCQeasy

A customer wants to connect a laptop to a 4K TV for a presentation. The laptop has an HDMI 1.4 port, and the TV supports HDMI 2.0. What is the maximum resolution and refresh rate the customer can expect?

A.4K at 60Hz

B.1080p at 120Hz

C.4K at 30Hz

D.1440p at 60Hz

AnswerC

HDMI 1.4 is limited to 4K at 30Hz, so this is the maximum the laptop can output.

Why this answer

HDMI 1.4 supports 4K resolution at 30Hz, while HDMI 2.0 supports 4K at 60Hz. The bottleneck is the laptop's HDMI 1.4 port, so the output will be limited to 4K at 30Hz.

Full explanation →

804

MCQeasy

A user reports that their computer does not power on at all. The technician verifies the power cord is connected and the wall outlet works. When the PSU is turned on, no fans spin and no LEDs light up. What should the technician check first?

A.Replace the CMOS battery.

B.Check if the power supply's on/off switch is set to the '1' (on) position.

C.Reseat the RAM modules.

D.Test the PSU with a multimeter.

AnswerB

If the switch is off, no power flows to the system. This is the quickest and easiest check before proceeding with hardware testing.

Why this answer

The power supply switch is a simple but common oversight; if it is in the off (0) position, no power reaches the system. Always verify this before more complex troubleshooting. Other steps like testing the PSU with a multimeter or paperclip test come after confirming the switch is on.

Full explanation →

805

MCQmedium

A company’s web server is accessible from the internal network but not from the internet. The server has a static IP of 192.168.1.10, and the router’s public IP is 203.0.113.50. What configuration is most likely missing?

A.The server’s default gateway is incorrect.

B.A firewall rule on the server is blocking inbound traffic.

C.Port forwarding is not configured on the router.

D.The DNS A record for the server points to the wrong IP.

AnswerC

Port forwarding maps the public IP and port to the server’s private IP, allowing internet users to reach it.

Why this answer

For a server on a private IP to be accessible from the internet, the router must have port forwarding configured to direct incoming traffic to the server’s private IP. Without it, requests to the public IP are dropped.

Full explanation →

806

MCQeasy

You are deploying 50 tablets for a school and need to secure them in kiosk mode so students can only access a specific learning app. Which hardware servicing step is essential before configuring the software?

A.Install a screen protector on each tablet.

B.Charge each tablet to at least 50% and apply all system updates.

C.Remove the SIM card from each tablet.

D.Replace the stock ROM with a custom firmware.

AnswerB

A charged, updated device ensures stable configuration without power loss or update interruptions.

Why this answer

This question tests understanding of device preparation for deployment. Before any software configuration, you must ensure the device has a full charge and is updated to avoid interruptions. Kiosk mode is set via software after the device is ready.

Full explanation →

807

MCQhard

A technician is configuring a small office network and needs to assign a static IP address to a printer. The technician pings the intended IP address and gets no reply, but the printer still fails to communicate after configuration. Which tool should be used to verify that no other device on the network is using that IP address?

A.Ping -t

B.arp -a

C.ipconfig /all

D.Netstat -r

AnswerB

arp -a displays the ARP table, which lists IP addresses and their associated MAC addresses, helping confirm if the IP is already assigned to another device.

Why this answer

The arp command shows the IP-to-MAC address mappings in the local ARP cache. If another device responded to a ping earlier, its MAC might be cached, or the technician can use arp -a to check for existing entries. However, a more reliable method is to use a network scanner or check the DHCP server logs.

In this context, arp helps verify if the IP is already in use by checking the cache after a broadcast.

Full explanation →

808

MCQhard

A network administrator is troubleshooting intermittent connectivity issues on a fiber optic link between two buildings. The link works but has occasional errors. The technician inspects the fiber and finds that the connectors are dirty. After cleaning them, the issue persists. What should the technician check next?

A.Replace the entire fiber cable.

B.Check the light level with a power meter.

C.Swap the SFP modules on both ends.

D.Run a loopback test on the switch ports.

AnswerB

A power meter measures signal strength, helping to identify if the signal is too weak due to attenuation, which cleaning alone cannot fix.

Why this answer

Dirty connectors are a common cause of fiber issues, but if cleaning doesn't resolve it, the next step is to verify the light level using a power meter. This will determine if the signal is strong enough or if there is attenuation from other causes like bends or damaged cables.

Full explanation →

809

MCQeasy

A customer reports that their Android phone's email app crashes whenever they try to open an attachment from a work email. The app worked fine last week. What is the most likely cause of this issue?

A.The email server is blocking attachments.

B.The email app's cache or data is corrupted.

C.The phone's operating system needs to be updated.

D.The attachment is too large for the phone to handle.

AnswerB

Correct. Clearing the app's cache or data often resolves crashes caused by corrupted temporary files.

Why this answer

This question tests the ability to identify common app problems. An app that was working and then stops often points to a corrupted cache or data, which can be cleared in Settings without reinstalling. The other options are less likely because the app worked recently and the issue is specific to attachments.

Full explanation →

810

MCQeasy

A customer reports that their desktop PC randomly shuts down when playing graphics-intensive games, but runs fine during web browsing. The power supply is a 450W unit. What is the most likely cause of the issue?

A.The CPU thermal paste has dried out, causing overheating only during gaming.

B.The power supply is underrated for the system's peak power draw.

C.The graphics card driver is corrupted, causing system instability.

D.The motherboard capacitors are failing, causing intermittent power loss.

AnswerB

A 450W PSU is often too low for a gaming PC; under load, the system may exceed the PSU's capacity, causing shutdowns.

Why this answer

This scenario tests understanding of power supply wattage requirements under load. Graphics-intensive gaming draws more power, and if the PSU cannot supply enough sustained wattage, the system may shut down to protect itself. A 450W unit is often insufficient for a gaming GPU, especially if the system has multiple drives or high-end components.

Full explanation →

811

MCQeasy

A small office has a network with a single switch and a wireless access point (WAP). Users on the wired network can access the internet, but wireless users cannot. The WAP shows a solid green power LED and a blinking amber activity LED. What is the most likely cause?

A.The WAP is configured with the wrong SSID.

B.The Ethernet cable from the WAP to the switch is faulty or not securely connected.

C.The switch port is configured as a trunk port.

D.The WAP's wireless radio is disabled in the firmware.

AnswerB

A faulty or disconnected Ethernet cable would prevent the WAP from communicating with the switch, causing the activity LED to blink amber (indicating errors) and no internet access for wireless users.

Why this answer

This question tests knowledge of WAP connectivity and LED indicators. The solid green power LED indicates the WAP is powered on, but the blinking amber activity LED suggests there is traffic but no successful connection to the wired network. The most likely issue is that the WAP is not properly connected to the switch, either due to a bad cable or a port issue.

The correct answer is that the Ethernet cable from the WAP to the switch is faulty or not securely connected.

Full explanation →

812

MCQeasy

A user reports that their Android tablet frequently crashes when using a specific note-taking app, but other apps work fine. They have already cleared the app cache and data. What should you do next to resolve the issue?

A.Perform a factory reset on the tablet.

B.Uninstall and reinstall the note-taking app.

C.Disable the tablet's antivirus software.

D.Replace the tablet's battery.

AnswerB

Reinstalling the app ensures the latest version is installed and can fix corrupted app files or compatibility issues.

Why this answer

This question tests the troubleshooting methodology for app-specific issues on mobile devices. Since the problem is isolated to one app and basic steps (cache/data clear) have failed, the next logical step is to check for app updates or reinstall the app, as updates often fix compatibility bugs.

Full explanation →

813

MCQmedium

A customer complains that their external USB 3.0 hard drive is only transferring files at USB 2.0 speeds (about 30-40 MB/s). They have confirmed the drive supports USB 3.0. What is the most likely cause?

A.The external drive is failing and needs to be replaced.

B.The USB cable is only rated for USB 2.0.

C.The drive is formatted with FAT32, which limits transfer speeds.

D.The computer's USB drivers are outdated.

AnswerB

Using a USB 2.0 cable with a USB 3.0 device will limit the transfer speed to USB 2.0 rates.

Why this answer

If a USB 3.0 device is plugged into a USB 2.0 port or a cable that only supports USB 2.0, it will fall back to slower speeds. The cable or port is the most common bottleneck. Driver issues are less likely, and the drive itself is not faulty.

Full explanation →

814

MCQeasy

A user wants to securely transfer files to a remote server using a command-line tool. Which port is the default for SFTP (SSH File Transfer Protocol)?

A.21

B.20

C.22

D.990

AnswerC

SFTP uses SSH on port 22 for secure file transfer.

Why this answer

SFTP runs over SSH, which uses port 22 by default. Port 21 is for standard FTP, port 20 is FTP data, and port 990 is FTPS (FTP over SSL).

Full explanation →

815

MCQeasy

A customer reports that their computer with a RAID 5 array is running very slowly during file transfers. The system uses three 1 TB SATA hard drives. The technician runs a diagnostic and finds that one drive has a high number of reallocated sectors. What is the most likely cause of the performance issue?

A.The RAID controller is overheating.

B.One of the drives is failing and the array is operating in degraded mode.

C.The array is configured with the wrong stripe size.

D.The operating system is defragmenting the array.

AnswerB

Correct. High reallocated sectors indicate a failing drive, forcing the RAID controller to use parity for reads, slowing performance.

Why this answer

In a RAID 5 array, if one drive is failing (e.g., high reallocated sectors), the array may still be operational but performance degrades significantly because the controller must reconstruct data on the fly from parity information. This scenario tests understanding of RAID 5 behavior during drive degradation.

Full explanation →

816

MCQhard

A technician is deploying a wireless network in a large warehouse. The warehouse has metal shelving and concrete walls. The technician needs to ensure coverage throughout the area. Which antenna type should be used for the access points to maximize coverage in this environment?

A.Omnidirectional antenna

B.Directional antenna

C.Dipole antenna

D.Rubber duck antenna

AnswerB

Directional antennas focus the signal in a specific direction, allowing better penetration through obstacles and longer range in targeted areas.

Why this answer

In an environment with obstacles like metal and concrete, omnidirectional antennas may not penetrate well. Directional antennas can focus the signal in a specific direction, helping to overcome obstacles and extend range. The correct answer is a directional antenna, such as a Yagi or panel antenna.

Full explanation →

817

MCQhard

A technician is troubleshooting a desktop PC that displays a blank screen on boot. The monitor's power LED is on (green), but no image appears. The PC beeps once during startup, and the hard drive activity light flashes. Which component is most likely faulty?

A.The CPU

B.The RAM

C.The video card

D.The monitor's power supply

AnswerC

With POST passed and no display, the video card or its connection is the most likely fault.

Why this answer

A single beep usually indicates a successful POST, meaning the CPU and RAM are working. The blank screen with no image suggests the video card or its connection is failing, as the monitor is receiving power.

Full explanation →

818

MCQmedium

A user complains that their laser printer is printing pages with a vertical black line down the left side of every page. The line appears consistently in the same position regardless of the document printed. What is the most likely cause?

A.The fuser roller has a scratch.

B.The toner cartridge's drum is scratched or has debris.

C.The paper feed rollers are dirty.

D.The printer driver is set to 'economy mode'.

AnswerB

A damaged drum will attract toner along the scratch, creating a consistent vertical line on every page.

Why this answer

A vertical black line in a fixed position on laser printer output is often caused by a scratch or debris on the photosensitive drum, which picks up toner and transfers it to the paper. The drum is part of the toner cartridge in many printers. Other components like the fuser or transfer roller would cause different patterns.

Full explanation →

819

MCQeasy

A small office uses a single router with a built-in DHCP server. The office has 15 devices that need IP addresses. The router's default subnet mask is 255.255.255.0. How many usable IP addresses are available for devices on this subnet?

A.254

B.255

C.256

D.15

AnswerA

Correct. A /24 network has 256 total addresses minus 2 reserved addresses equals 254 usable addresses.

Why this answer

The subnet mask 255.255.255.0 corresponds to a /24 network, which provides 256 total addresses. After reserving the network address and broadcast address, 254 usable IP addresses remain, which is more than enough for 15 devices.

Full explanation →

820

MCQhard

A user reports that their NFC-enabled smartphone cannot make contactless payments at a terminal that works with other phones. The user has a thick wallet case with metal credit cards. What is the most likely issue?

A.The payment terminal's NFC reader is faulty.

B.The phone's NFC antenna is damaged.

C.The wallet case is interfering with the NFC signal.

D.The phone's payment app is not configured correctly.

AnswerC

Metal objects in the case create a Faraday cage effect, blocking the NFC field required for payment.

Why this answer

NFC uses electromagnetic fields; metal objects can block or detune the NFC antenna. A thick case with metal cards can shield the phone's NFC antenna, preventing communication with the payment terminal. Removing the case or isolating the phone from metal usually resolves this.

Full explanation →

821

MCQmedium

A technician is troubleshooting a desktop that powers on but displays nothing on the monitor. The monitor is on and connected via HDMI. The technician hears one short beep from the motherboard speaker. What should the technician do next?

A.Replace the RAM modules

B.Test the monitor on another computer

C.Reseat the graphics card

D.Flash the BIOS

AnswerC

A single beep means POST passed, so the most likely cause is a loose or faulty GPU.

Why this answer

One short beep typically indicates a successful POST, meaning the CPU, RAM, and motherboard are likely functional. The issue is therefore probably with the display subsystem: the video card or its connection. The technician should reseat the GPU or try a different video output port.

Full explanation →

822

MCQeasy

A technician is setting up a new network printer for a department. The printer needs to be accessible to all users on the same subnet without a dedicated print server. Which configuration method should the technician use?

A.Connect the printer via USB to a user's workstation and share it

B.Assign a static IP address to the printer

C.Use DHCP with a short lease time

D.Install a print server on a domain controller

AnswerB

A static IP ensures the printer is always reachable at the same address on the subnet, enabling direct printing.

Why this answer

Assigning a static IP address to the printer ensures it has a permanent address on the network, allowing all users on the subnet to connect directly. DHCP could change the IP, breaking connections. A static IP is the simplest method for direct network printing without a server.

Full explanation →

823

MCQhard

A technician is troubleshooting a laptop that has a blank screen after the user closed the lid and then reopened it. The laptop's power LED is on, and the fan is spinning. Pressing keys does not wake the display. What should the technician do first?

A.Replace the LCD panel

B.Perform a hard reset by holding the power button for 10-15 seconds

C.Reseat the RAM modules

D.Check the laptop's lid sensor for damage

AnswerB

A hard reset can resolve a system that is stuck in a sleep state or has a hung graphics controller. This is a standard first step for blank screen after lid closure.

Why this answer

This scenario describes a classic 'lid sensor' or 'display not waking' issue. The laptop is on (power LED, fan), but the display is blank. The first step should be to perform a hard reset by holding the power button to force a shutdown, then power on again.

This can clear a hung state.

Full explanation →

824

MCQmedium

A technician is troubleshooting a desktop that beeps three times repeatedly and shows a blank screen upon power-on. The system has a discrete GPU installed and two sticks of RAM. What is the most likely cause indicated by the beep code?

A.The discrete GPU is not seated properly.

B.The CPU has failed or is overheating.

C.The RAM is faulty or not properly installed.

D.The BIOS battery is dead.

AnswerC

Three beeps are a common AMI BIOS code for a memory error; the technician should reseat, test one stick at a time, or replace the RAM.

Why this answer

Beep codes are used by the BIOS/UEFI to indicate hardware errors during POST. Three beeps typically indicate a memory (RAM) error. The technician should reseat or test the RAM sticks individually to isolate the faulty module.

Full explanation →

825

MCQhard

A technician is replacing a failed hard drive in a server. The new drive has a SATA III connector, but the server's backplane only supports SATA II. What will be the result of using this drive?

A.The drive will not be recognized

B.The drive will operate at SATA III speeds

C.The drive will operate at SATA II speeds

D.The drive will be damaged

AnswerC

The drive will negotiate down to SATA II speed due to the backplane's limitation.

Why this answer

SATA III is backward compatible with SATA II, so the drive will work but at SATA II speeds (3 Gbps). This tests knowledge of SATA generation compatibility and performance limitations. The drive will not be damaged but will not achieve its maximum speed.

Full explanation →

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