CompTIA A+ Core 1 220-1201 (220-1201) — Questions 901–975

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

High latency significantly impacts VDI performance, especially during login when many resources are loaded. Deploying a local VDI broker or caching server at the remote office reduces round-trip time. Alternatively, using a CDN or WAN optimization can help, but a local broker is most effective for VDI.

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

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

Blurry text at native resolution on a 4K monitor often indicates incorrect scaling settings in the operating system. Windows scaling should be set to 150% or 200% to make text readable, otherwise it appears too small and blurry due to pixel density.

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

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

Port 587 is the standard SMTP submission port (RFC 6409) used by email clients to send outgoing mail. Since the user can browse the internet (ports 80/443 are open) but cannot send or receive emails, a firewall blocking port 587 would prevent the email client from submitting outgoing messages to the server, while leaving web traffic unaffected. The email server is confirmed working, so the issue is likely a blocked outbound port on the client's firewall.

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

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

The nozzle check pattern test passes, indicating the printhead and nozzles are functioning correctly. Blank pages with full ink carticles suggest a communication or driver issue. Updating the printer driver can resolve software conflicts or corruption that prevents data from being sent to the printer.

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

In RAID 1, a failing drive causes the controller to spend time retrying reads, slowing performance. The correct fix is to replace the failing drive and let the array rebuild, restoring both performance and redundancy.

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

This scenario tests understanding of how CPU clock speed affects multitasking performance. A low clock speed means the processor cannot execute instructions quickly enough, leading to high usage and sluggishness. Upgrading to a CPU with a higher clock speed would directly address the bottleneck.

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

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

This question tests understanding of printer maintenance procedures and error reset mechanisms. Many printers require a manual reset or calibration after replacing a consumable like the fuser. Simply installing the part without resetting the error code will not clear the message.

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

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

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

A failing power supply can be sensitive to humidity, causing internal shorts or capacitor leakage. Inrush current from multiple PCs on the same circuit could also be a factor, but the humidity correlation points to PSU degradation. Proper grounding eliminates outlet issues.

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

The +12V rail's current rating determines how much power it can deliver to GPUs and CPU. A single rail at 40A provides 480W, which may be insufficient for two high-end GPUs. The technician must verify total system power draw against the PSU's capacity.

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

This question tests the systematic approach to display troubleshooting. The monitor is powered on (LED lit) but not receiving a signal, so the most common cause is a loose or faulty cable connection. Always check physical connections before moving to more complex settings or hardware replacements, as this is the quickest and simplest fix.

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

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

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

Garbled output from a printer that works on a test page but not from workstations usually indicates a driver mismatch. The test page uses the printer's internal firmware, while user print jobs rely on the installed driver. Installing the correct driver for the printer model and operating system resolves the issue.

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

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

To prevent unauthorized booting from external media, the technician must set a boot order that prioritizes the internal SSD and disable other boot devices. Additionally, setting a UEFI administrator password prevents unauthorized users from changing these settings.

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

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

A common cause of rapid battery drain on smartphones is apps running in the background, especially after an OS update that may change permissions or app behavior. Checking battery usage statistics can help identify the culprit.

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

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

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

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

This question tests troubleshooting cloud synchronization issues. A common cause is the client application being stopped or crashed, which prevents syncing despite a working internet connection. Account suspension would block access entirely, firewall rules would affect other services too, and server downtime would impact all users, not just one.

VoIP traffic is sensitive to latency, jitter, and packet loss. Without QoS, data traffic can congest the network, causing choppy audio and dropped calls. Implementing QoS prioritizes voice traffic.

A CPU error LED can indicate several issues, including power delivery problems. The 8-pin CPU power connector is often overlooked; if it is loose or not connected, the CPU will not receive power, triggering the error. This is a common mistake during builds or after cleaning.

Intermittent communication errors with drives that pass SMART tests often point to a faulty RAID controller, cable, or backplane. Since the drives themselves are healthy, the issue is likely with the controller or its connection to the drives.

For systems with more than 4 GB of RAM, the OS must be 64-bit, and the firmware must have memory remapping enabled. This feature allows the UEFI to reassign memory addresses previously reserved for PCI devices, making the full RAM capacity available to the OS.

This scenario focuses on app-specific sync issues after an OS update. The most common cause is that the app's permissions or account settings were reset during the update, requiring re-authorization or re-configuration of the Exchange account within the calendar app.

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

DDR3-1333 and DDR3-1600 are both DDR3, so they are physically compatible. However, mixing speeds forces all modules to run at the slower 1333 MHz, which may slightly reduce performance. The upgrade is possible but not optimal.

The ATX power connector (main power connector) supplies power from the PSU to the motherboard. If it is loose or disconnected, the motherboard will not receive power, causing a no-power condition. Always check this first before assuming PSU failure.

This question tests advanced RAID understanding. RAID 5 uses one drive's worth of capacity for parity, so three 1TB drives yield 2TB usable. The loss of 0.2TB suggests the replacement drive has slightly less capacity due to manufacturer differences or sector mapping.

Memory controllers are integrated into the CPU, but the motherboard's memory slots and BIOS determine which type is supported. If the board only supports DDR5, using a CPU that supports both will still require DDR5 modules.

This question tests understanding of M.2 installation and BIOS/UEFI configuration. Many motherboards require a specific UEFI setting (CSM disabled, UEFI boot enabled) or a BIOS update to support NVMe as a boot device. The most common issue is that the motherboard's firmware does not recognize the NVMe drive without a BIOS update.

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

RAID 0 stripes data across multiple drives, offering the best read/write performance by utilizing all drives simultaneously. However, it provides no fault tolerance, meaning if one drive fails, all data is lost. This matches the requirement for maximum performance without redundancy.

MHL (Mobile High-Definition Link) allows a smartphone to output video and audio through its USB port (often USB-C or micro-USB) and converts it to HDMI, which is exactly what is needed to connect to a TV with only an HDMI port. This adapter is the most appropriate because it directly bridges the smartphone's mobile output to the TV's HDMI input without requiring any wireless network or additional power source.

This question tests understanding of storage performance hierarchy. The existing SATA SSD is already fast for boot and applications, but an M.2 NVMe SSD is significantly faster (3-5x). Replacing the HDD with another SSD would not improve boot times as much, and adding RAM does not directly affect storage speed.

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

Vertical black streaks on laser printer output are typically caused by a damaged or scratched drum. The drum rotates and transfers toner, so any defect creates a repeating mark. Cleaning or replacing the drum usually resolves the issue.

Option B is correct because creating a separate VLAN for the guest network isolates guest traffic at Layer 2, and applying an ACL on the router's VLAN interface blocks traffic destined for the internal network while permitting internet-bound traffic. This ensures guests cannot reach internal corporate devices, meeting the security requirement without additional hardware.

HDMI and DisplayPort are different standards, but many cables are available with HDMI on one end and DisplayPort on the other. A bidirectional cable can connect an HDMI source to a DisplayPort monitor.

Projector lamps dim over time and typically need replacement after 2000-4000 hours. A dim image with max brightness and moderate lamp hours indicates the lamp is nearing end of life. The correct answer identifies lamp aging as the primary cause, not filters or cables.

A hybrid cloud deployment combines on-premises infrastructure with public cloud services, allowing data migration while maintaining local access during the transition. This ensures existing emails can be retained and synchronized. A public-only or private-only model would not support the migration seamlessly.

Since the webcam is not listed in Device Manager at all, the issue is at the hardware detection level, not the driver or software level. An intact ribbon cable suggests the webcam module itself or the motherboard's USB controller (which typically handles the internal webcam as a USB device) has failed, preventing enumeration. Option C correctly identifies this hardware failure as the next logical suspect.

The random shutdowns under load suggest the power supply cannot deliver enough wattage to sustain peak power draw from the GPU and CPU. A 500W PSU may be insufficient for a high-end gaming system, causing voltage drops or thermal overload protection to trigger. Upgrading to a higher-wattage PSU with adequate +12V rail capacity would resolve the issue.

SaaS applications are entirely dependent on internet connectivity. A local cached copy of the data can provide offline access. Other options like VPN or secondary internet are not practical for all employees, and a local server would require a different service model.

Artifacts and color distortion after a new GPU install typically point to insufficient power delivery or a faulty card. Since the system POSTs, it's not a complete failure but likely a power or driver issue. The correct answer highlights that the power supply may not meet the card's requirements, causing instability.

The correct answer is B because an IPS (In-Plane Switching) panel with a high color gamut (e.g., sRGB, Adobe RGB, or DCI-P3 coverage) is essential for accurate color reproduction. IPS technology provides consistent color and brightness across wide viewing angles, which is critical for graphic design work where color fidelity is paramount. High color gamut ensures the display can reproduce a broader range of colors, meeting professional calibration standards.

Overheating is a common cause of random shutdowns, especially under heavy load. The CPU thermal protection mechanism triggers to prevent damage. This scenario tests the understanding of thermal management and its impact on system stability.

A Local Area Network (LAN) is the correct choice because it connects devices within a single physical location, such as an office, using wired Ethernet (IEEE 802.3) and switches. It requires no internet access and is cost-effective for a small business with a limited budget, as it only needs basic hardware like a switch and Cat5e/Cat6 cabling.

A Metropolitan Area Network (MAN) is designed to interconnect multiple LANs across a city or metropolitan region, typically using high-speed fiber optic links such as Metro Ethernet or SONET/SDH. This makes it the ideal choice for connecting five elementary schools spread across a city to a central data center, as it covers a larger geographic area than a LAN but is more localized than a WAN.

A toner probe (inductive amplifier and tone generator) is the correct tool for tracing an unlabeled cable from a patch panel to a specific wall jack. The tone generator injects a distinctive audio signal onto the wire pair, and the inductive probe detects that signal without requiring a direct electrical connection, allowing you to identify the correct cable even in a dense, messy bundle.

Mixing SATA speeds (3 Gb/s drives on a 6 Gb/s controller) is generally backward-compatible and should not cause freezes. The freezing during heavy I/O suggests a thermal issue, as RAID 5 rebuilds and heavy writes generate significant heat. Overheating can cause drives to throttle or the controller to lock up.

Ghosting in laser printers is often caused by a worn or damaged cleaning blade that fails to remove residual toner from the drum. The leftover toner transfers to the next page, creating a faint duplicate. Replacing the cleaning blade or drum unit usually fixes the problem.

The correct answer is A because a 6+2 pin PCIe power cable can be used to convert the 6-pin connector into an 8-pin by attaching the additional 2 pins. This tests understanding of modular power supply cables and PCIe power connector compatibility.