Comptia A+ Q & A

Common causes for a computer monitor not displaying an image often involve issues with connections or input settings, rather than more complex hardware failures such as inverter, LCD display, or backlight failures.

A stuck pixel refers to when a single pixel on the screen displays one color consistently, while a dead pixel remains unlit. This distinction is important in understanding display issues.

A dim display on a laptop LCD screen can be caused by either a faulty backlight or an issue with the inverter that powers the backlight. Stuck pixels, dead pixels, and incorrect color patterns do not typically cause a dim display on an LCD screen.

Burn-in is the term used to describe the permanent discoloration of a computer display screen caused by displaying the same static image for long periods of time. This happens when pixels wear out unevenly, leading to some areas appearing darker or discolored compared to others.

Ping is a utility that sends echo request packets to the target host and waits for an echo reply, thus testing the reachability of the host across an IP network. Netstat displays network connections, IPConfig displays IP configuration for network interfaces, and Tracert traces the route packets take to reach a destination host.

IPCONFIG is the tool used in Windows Command Prompt to display IP addresses, subnet mask, and default gateway for all adapters.

IFCONFIG is the correct Linux command-line utility used for displaying and modifying network interface configuration settings. It allows users to view information about network interfaces and change their settings.

The correct command in Microsoft Windows OS for displaying intermediary points on the packet route is TRACERT, which stands for Trace Route. TRACERT allows users to trace the route that packets take to reach a destination network. ROUTE PRINT displays the current IP routing table, TRACEROUTE is a similar command used in Unix-based systems, and NETSTAT displays active network connections and listening ports.

NETSTAT is a command-line utility in MS Windows that displays protocol statistics and current TCP/IP network connections, while TRACERT, TRACEROUTE, and NSLOOKUP are other command-line utilities with different functionalities.

NBTSTAT is a Windows command-line utility specifically designed for troubleshooting NetBIOS name resolution issues.

The correct command to display a list of domains, computers, or shared resources available on a specific computer is NET VIEW. The other options (REG, NETSTAT, VIEW) do not serve the same purpose and are not related to listing domains, computers, or shared resources.

The correct answer includes reseating the device's battery, erasing all content/settings and restoring to factory defaults, pressing a specific key combination/button for system restart, and removing screen protector and cleaning the screen. Reinstalling the operating system, applying excessive force, and submerging the device in water are not recommended troubleshooting methods and may cause further damage.

Long vertical streaks on each output page in laser printing typically indicate a problem related to the imaging drum being damaged. This can lead to the streaks appearing consistently on all printed pages.

Faded printouts and printing blank pages are common indicators of a depleted toner cartridge. Garbled characters, ghost images, and vertical streaks typically point to other issues such as a faulty drum unit or fuser assembly.

Ghost images on output pages in a laser printer indicate that the primary issue is with the cleaning step of the imaging process. Ghost images are often caused by residual toner from previous print jobs being transferred to subsequent pages. A proper cleaning of the printer components can resolve this issue.

Toner falling off the printed copy usually indicates that the fusing unit, which is responsible for melting and bonding the toner to the paper, is not functioning properly. Issues with the toner cartridge, print head, or cleaning blade may cause print quality issues, but they are not directly related to toner falling off the copy.

Garbled characters on output pages are typically caused by issues with the printer driver, not calibration, fuser assembly, or imaging drum.

Printer replacement parts are commonly grouped together in a maintenance kit for easy access and organization.

A print spooler is a software program that manages all print jobs being sent to the printer. It stores these print jobs in a queue until the printer is ready to print them. The other options do not fulfill the specific function described.

During the Power-On Self Test (POST), a long continuous beep tone is typically an indicator of RAM failure. The other beep codes mentioned in the incorrect answers represent different hardware issues.

During the Power On Self Test (POST), different beep codes indicate various hardware issues with the computer. In this case, one long followed by two short beeps typically indicates a video adapter card failure.

Disconnecting the USB thumb drive, checking BIOS settings for boot order, and removing the floppy disk from the Floppy Disk Drive are common troubleshooting steps for resolving 'Invalid boot disk' error messages. Safe mode troubleshooting, using Administrative Tools, or updating graphics card drivers are not typically relevant to this particular issue.

The correct answer is true because the Startup and Recovery configuration settings can indeed cause continuous reboots of a Windows host when encountering a persistent stop error. These settings determine whether the system automatically restarts after a system failure, and changing them can help troubleshoot and resolve the issue.

The 4/8-pin 12vP4 connector is the correct connector on the motherboard that should be checked/reseated to ensure the CPU is receiving power. The other options listed are not related to CPU power connectivity.

A POST card, loopback plug, PSU tester, and multimeter are tools commonly used to diagnose failing hardware components within a PC case. A tone probe, maintenance kit, and tone generator are not typically used for this purpose and are thus incorrect choices.

File fragmentation can slow down a hard drive as it causes the drive head to jump around to different parts of the disk to read a file. Insufficient amount of RAM can also slow down performance as the system will need to rely more on virtual memory, which is typically slower than RAM.

S.M.A.R.T. is primarily designed to monitor and predict HDD failures based on various parameters, rather than network interface issues, video adapter failures, or power spikes.

Replacing a faulty mechanical component of a magnetic drive indeed requires specialized environment and diagnostic tools as it involves dealing with sensitive magnetic components that could be affected by external factors.

The correct answers are 'Locates bad sectors and recovers readable information' and 'Fixes errors on the disk'. The incorrect answers provided do not correspond to the functions of the /R switch of the CHKDSK utility.