CompTIA A+ Core 1 220-1201 (220-1201) — Questions 376–450

Windows 11 requires UEFI with GPT partition table and Secure Boot. The error indicates the drive is using MBR, which is incompatible with UEFI. The technician should either convert the drive to GPT using diskpart or reinitialize it as GPT during installation.

A red LOS light indicates no optical signal is reaching the ONT. Even if the cable looks intact, the most common cause is a dirty or damaged connector at the termination point. Cleaning the fiber end with a proper kit often resolves the issue.

This question tests systematic troubleshooting. Since the hardware appears fine and other devices work, the issue is likely software-related. Checking IP configuration with ipconfig is the logical first step to see if the adapter has a valid IP or is stuck with an APIPA address.

The correct answer is A because front-panel USB ports are often connected via internal headers that may only support USB 2.0 speeds, especially in older cases. This tests understanding that USB 3.0 requires a blue port and proper internal cabling for full speed.

A yellow exclamation mark in Device Manager indicates a driver problem, but since updating the driver did not help, the issue may be a hardware conflict or a disabled device. The next step is to check if the webcam is physically disabled via a function key (e.g., Fn+F10) or a privacy shutter. Many laptops have a hardware switch or a keyboard shortcut to disable the camera for privacy.

In a Windows domain, DNS is the primary method for resolving hostnames to IP addresses, especially for servers. The technician should add an A record for the file server in the DNS zone. DHCP assigns IPs but does not provide name resolution, and WINS is legacy for NetBIOS names.

Captive portals require the device to detect the portal and open a browser. If the tablet has a static IP or the captive portal detection feature is disabled, the login page will not appear automatically.

The touchpad is likely disconnected or shorted due to liquid ingress, even though the keyboard still works. In many laptops, the touchpad connects via a separate ribbon cable that can be damaged by liquid. The first step should be to inspect and reseat or replace the touchpad cable.

This question tests knowledge of USB port power delivery and cable length limitations. Front USB ports often share a single internal header and may deliver less power than rear ports directly on the motherboard, causing high-power devices like external hard drives to fail.

Even if the CPU itself is functional, instability can arise from other factors. Overheating due to a failing fan can cause intermittent crashes. The CPU fan is critical for maintaining safe temperatures under load.

SMTP uses port 25 for sending email, while POP3 (port 110) or IMAP (port 143) are used for receiving. Blocking port 25 prevents outgoing email but not incoming.

The host only has 2 GB free, but the VM requests 4 GB, causing the host to use swap memory. Reducing the VM's RAM allocation to 2 GB will allow both the host and VM to run within physical memory, avoiding swapping.

This scenario tests the concept of elasticity in cloud computing. Elasticity allows resources to automatically scale up or down based on demand, which is ideal for handling traffic spikes. Scalability is a broader term that can include manual scaling, while high availability and fault tolerance focus on uptime, not automatic adjustment to load changes.

Vertical lines appearing during POST (pre-OS) indicate a hardware-level issue, most commonly a failing graphics card (GPU) or a damaged video memory. Since the problem occurs before Windows loads, it is not a driver or software issue. Testing with a known-good GPU or reseating the existing one is the recommended step.

This question tests knowledge of mobile printing solutions in a network environment. AirPrint is a built-in iOS feature that discovers printers on the same network via Bonjour. Google Cloud Print is deprecated, and Bluetooth or USB tethering are not suitable for a wired network.

This question tests understanding of DNS resolution for internal resources. When a server hosts an internal website, clients need a DNS record (often a host record) to resolve its hostname to the private IP address. Without it, clients can't reach the site by name even with internet access.

A cable tester with a wire map function can detect signal degradation caused by EMI, often showing intermittent faults or crosstalk. A multimeter measures voltage/continuity but not EMI on data cables. A loopback plug tests NIC functionality, and a spectrum analyzer is overkill for simple EMI detection in this context.

To create 8 subnets from a /16 network, you need to borrow 3 bits (2^3=8 subnets). This gives a /19 subnet mask (255.255.224.0), which provides 8190 usable hosts per subnet (2^13-2), meeting the requirement of at least 1000 hosts.

Bluetooth and Wi-Fi (especially 2.4 GHz) share the same frequency band and can interfere. This is a common issue when both are active simultaneously, especially with older or poorly shielded hardware.

Since the charging pad works with another phone, the issue is with the user's phone. A thick case, especially one with metal or magnetic components, can interfere with wireless charging and cause overheating. The correct answer is a case with metal or magnetic parts.

Horizontal white lines on inkjet output often indicate clogged printhead nozzles. Running the printer's cleaning cycle is the first recommended step to clear dried ink from the nozzles.

Since the ping succeeds, the printer is reachable at the network level. The issue is likely with the printer configuration or the print spooler on the computer. Common causes include the printer being offline, paused, or having a driver issue.

Fans spinning indicates the card is receiving power, but a blank display often means the monitor is not receiving a signal. The most common oversight is connecting the display cable to the motherboard's video port instead of the new graphics card's ports.

USB-C with DisplayPort Alt Mode outputs a DisplayPort signal; to connect to an HDMI monitor, a USB-C to HDMI adapter or cable is needed. A simple USB-C to USB-A adapter will not carry video.

This scenario tests understanding of application virtualization, where a legacy OS runs as a guest on a modern host. Using a Type 2 hypervisor like VirtualBox allows Windows 7 to run inside Windows 11, solving the compatibility problem without hardware changes.

Direct thermal printers require heat-sensitive paper that darkens when heated. Using the wrong paper (e.g., thermal transfer paper) will not produce an image. The technician must ensure the paper is compatible with direct thermal printing.

A toner and probe set is the standard tool for tracing individual cables among many. The toner generates a signal on the wire, and the probe emits an audible tone when near the correct cable. Cable testers check continuity, crimpers attach connectors, and punch-down tools terminate cables—none trace routes.

When a network printer appears idle but jobs disappear, the issue is often with the print spooler on the server or client. The spooler may be stalled or corrupted, causing jobs to be lost without error. Checking the print queue on the server and restarting the spooler service is the appropriate first step.

The internal display or its cable/connector is faulty because the external monitor works fine, ruling out the graphics adapter. This isolates the problem to the laptop's LCD panel or its connection.

The 4+4 pin CPU connector can be used as either a 4-pin or 8-pin connector. The technician must ensure that both 4-pin halves are connected together to form the 8-pin CPU power connector required by the motherboard. If only one 4-pin half is connected, the CPU may not receive power.

Bluetooth printers require the correct driver or profile (e.g., SPP or HCRP) to interpret data. Garbled text indicates the tablet is sending data in an unsupported format or the wrong driver is loaded. Installing the proper printer driver usually resolves this.

ECC and non-ECC RAM are not interchangeable; servers that require ECC will not boot or may operate incorrectly with non-ECC modules. Additionally, mixing ECC and non-ECC is not supported. The technician must use ECC RAM specifically designed for the server.

A stylus with a fine tip is ideal for capturing signatures accurately on a touchscreen. Capacitive styluses are common for this purpose. The correct answer is a capacitive stylus, as it provides precision.

RAID controllers use cache batteries to protect data in write cache during power loss. When the battery is low, the controller may disable write caching to prevent data loss, causing write performance to drop. This tests knowledge of RAID controller cache behavior.

Using dual-channel memory (two matched sticks) provides a performance boost over a single stick because it allows the memory controller to access both modules simultaneously. For 32 GB, two 16 GB sticks are the best balance of performance and capacity.

This scenario tests knowledge of duplex scanning settings on a multifunction device. The ADF is feeding pages correctly, but the printer is set to simplex scanning, which only scans one side. Changing the scan mode to duplex will resolve the issue.

Continuous short beeps typically indicate a power supply failure or a motherboard power issue. However, given the recent RAM upgrade, it is more likely that the new RAM is incompatible or not seated correctly. The technician should first reseat the RAM and try the original modules to isolate the problem.

An anti-glare screen protector reduces reflections and improves readability in bright environments. A privacy filter, while reducing glare, also restricts viewing angles, which is not the primary need. A portable monitor or external battery do not address screen readability.

To allow all users on a subnet to print without a dedicated server, the printer should be configured with a static IP address and connected via Ethernet. This makes it a network printer accessible by IP. USB connection would only allow local printing from one computer.

This question tests basic understanding of DNS. DNS resolves hostnames to IP addresses, allowing clients to use a friendly name like 'fileserver' instead of an IP. DHCP assigns IPs, but DNS provides name resolution.

Private IP addresses are defined in RFC 1918: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. 192.168.1.10 falls within the 192.168.0.0/16 range, making it a valid private address for LAN use.

The laptop's IP address is on a different subnet (192.168.2.0/24) than the coffee shop's network (192.168.1.0/24), so it cannot communicate with the gateway. This tests understanding of subnetting and how devices must be on the same subnet to reach the default gateway.

A print job stuck in the queue but not printing for one user often indicates a driver or spooler issue specific to that user's workstation. Corrupted print spooler files or incorrect driver settings can cause this, while the MFP itself and network are fine.

An amber LED on a redundant PSU indicates a fault or warning, but the server remains operational on the other PSU. The faulty unit should be replaced as soon as possible to restore redundancy. Ignoring it risks downtime if the second PSU fails.

Fiber-optic connections typically use an ONT that converts optical signals to electrical, and the router connects via Ethernet (RJ45). Coaxial is for cable, RJ11 for DSL, and fiber patch cables connect the ONT to the wall, not the router. Ethernet is the standard interface for modern fiber installations.

The most logical first step is to ensure the device has power; a drained battery is a common cause of a device not turning on. Checking the charge level and attempting to charge it is a simple, non-invasive test that can quickly identify the problem.

Most cloud IaaS providers allow creating a new volume from a snapshot, which can then be attached to the existing VM. This is faster than restoring the entire VM from a full image. The technician should create a new disk from the snapshot and attach it, then copy the data to the original disk if needed.

CCFL-backlit LCD monitors use an inverter to convert DC power to high-voltage AC to light the fluorescent tube. A failing inverter often results in a dim display or one that flickers before failing completely. This is a common failure in older monitors.

MMS requires specific APN settings for the carrier, including MMS proxy and port. Even with cellular data on, incorrect or missing MMS APN fields will prevent MMS from working.

The Super I/O chip is responsible for monitoring hardware sensors, including CPU temperature, and can trigger a hardware-level shutdown if thresholds are exceeded. The BIOS/UEFI configures these thresholds, but the actual monitoring is done by the Super I/O. The chipset and voltage regulator module do not perform thermal monitoring.

Since the printer is on the same subnet, no routing is needed; ARP is required to resolve the printer's IP to its MAC address. If ARP fails, the ping will fail. DNS is not used when connecting by IP, and DHCP is not involved since the computer already has an IP.

Cable internet uses a shared bandwidth model where many users in the same neighborhood contend for the same local loop capacity. During peak usage times (evenings), this contention leads to slower speeds. Wireless interference, router age, or ISP throttling are less likely to cause consistent evening slowdowns.

The correct first step is to power off the laptop and remove the battery. This ensures safety and prevents electrical shorts or damage during replacement. After removal, the technician can install a new battery.

This is a classic symptom of a failing or overheating network interface card (NIC). High data throughput generates heat, and a marginal NIC may fail under sustained load, while low-bandwidth tasks work fine.

802.11ac uses MIMO (Multiple Input Multiple Output) technology, which requires multiple spatial streams to achieve high throughput. Enabling MIMO with all antennas maximizes data rates, especially for streaming.

The PSU's +12V rail is rated for 62A, and the total load after adding drives is 58A, which is within the rating. However, it is good practice to leave headroom (typically 10-20%) to avoid running the PSU at maximum capacity, which can reduce efficiency and lifespan. In this case, the PSU is technically adequate but marginal.

This scenario points to a client-specific configuration problem. Since other devices work, the issue is isolated to the user's laptop, and a misconfigured DNS setting is a common cause for internet access failure while local network connectivity remains intact.

Physical-to-Virtual (P2V) migration converts a physical machine into a virtual disk image, preserving the OS, applications, and hardware identifiers. This is the standard method for moving legacy systems to virtual environments.

Email sending typically uses SMTP on port 25 (or port 587 for submission). If the firewall blocks outbound traffic on port 25, the email client cannot send messages, but receiving (using POP3 or IMAP) remains unaffected. This is a common security measure to prevent spam, but it can interfere with legitimate email sending.

Intel VT-x or AMD-V is the hardware virtualization feature that must be enabled in the CPU configuration section of UEFI. Without it, virtual machines will run slowly or fail to start. This tests knowledge of common UEFI settings for virtualization.

For long-distance point-to-point links, directional antennas (like parabolic or grid) on the 5 GHz band provide high gain and focused signal, achieving high throughput over distance. 2.4 GHz has more interference and lower capacity.

When traveling internationally, devices often need to have data roaming enabled in the settings to use cellular data on foreign networks. This is a common oversight even with an active roaming plan.

This question tests knowledge of DNS, which resolves hostnames to IP addresses. Without DNS, users would have to use IP addresses to access network resources.

A repeating defect at a regular interval is often caused by a damaged roller, and the interval helps identify which roller. A 3-inch interval matches the circumference of the fuser roller. The drum's circumference is typically larger, so the interval would be different.

Ghosting or image retention on an IPS panel is often due to burn-in or temporary image persistence. This occurs when static images are displayed for long periods, causing the liquid crystals to not fully relax. It is a hardware defect that may be irreversible.

Standard web traffic uses port 80 (HTTP) and encrypted web traffic uses port 443 (HTTPS). Port 22 is for SSH, port 21 for FTP, and port 3389 for RDP.

This question tests knowledge of wireless standards and their characteristics. 2.4 GHz signals (like 802.11n) have better range and penetration through obstacles than 5 GHz signals, making them ideal for environments with many barriers.

TPM (Trusted Platform Module) is often disabled by default in the UEFI firmware. It must be enabled in the security settings of the UEFI. Additionally, the system must be set to UEFI mode (not Legacy) with Secure Boot enabled for Windows 11 compatibility.

The loose component is likely the vibrator motor, which is often a small rectangular module that can become dislodged during disassembly. It should be securely reattached to prevent rattling and ensure proper vibration function. Ignoring it could lead to customer complaints about missing vibration alerts.

A series of long, continuous beeps typically indicates a memory (RAM) issue, not a graphics card problem. This is a common POST code that helps isolate hardware faults before the system can boot.

This question tests the distinction between PaaS and other service models. Platform as a Service (PaaS) provides a managed platform including OS, runtime, and database, allowing the customer to focus on deploying their application without patching the OS. IaaS gives full control but requires OS management, SaaS is a finished application, and DaaS is for virtual desktops.

OSPF uses multicast addresses (224.0.0.5 and 224.0.0.6) to exchange routing information. If the network does not support multicast or if multicast is blocked by access lists or switch configurations, OSPF neighbors cannot form and routes are not exchanged. Since direct pings work, unicast connectivity is fine, but multicast is required for OSPF.