CompTIA A+ Certification Quiz Enhanced 11

What is the function of the real time clock (RTC) in a computer system?

• It manages the computer's power supply.

• It keeps track of the calendar date and time.

• It stores user data for quick access.

• It enhances the computer's graphics capabilities.

Answer explanation

The function of the real time clock (RTC) in a computer system is to keep track of the calendar date and time.

What type of battery is commonly used in the RTC of a computer?

• AA battery

• Coin cell lithium battery

• Nickel-cadmium battery

• Alkaline battery

Answer explanation

The correct type of battery commonly used in the RTC of a computer is the coin cell lithium battery.

If the system firmware setup shows incorrect date or time, what is the likely cause?

• The monitor is disconnected.

• The RTC battery is failing.

• The hard drive is corrupted.

• The operating system needs an update.

Answer explanation

If the system firmware setup shows incorrect date or time, the likely cause is that the RTC battery is failing, as it is responsible for maintaining the system's date and time settings.

What should you check first if no image is displayed on a monitor or projector?

• The brightness settings.

• The system's RAM capacity.

• Whether the display device is plugged in and turned on.

• The graphics card performance.

Answer explanation

Check whether the display device is plugged in and turned on first to troubleshoot the issue of no image being displayed on a monitor or projector.

Which port is recommended to use if there is no image on the monitor and the computer has multiple video output options?

• USB port

• VGA port

• HDMI port

• Ethernet port

Answer explanation

The HDMI port is recommended to use if there is no image on the monitor and the computer has multiple video output options.

What is a recommended method to troubleshoot potential cable problems when a display is powered on but not functioning correctly?

• Replace the video card

• Use the "known good" technique

• Increase the screen resolution

• Turn off the display and turn it back on

Answer explanation

To troubleshoot cable problems, using the 'known good' technique involves swapping the suspect cable with a known working one to isolate the issue.

What might indicate that a projector bulb has completely failed?

• The image appears stretched

• The bulb emits a loud noise

• The bulb health warning indicator lights up

• The projector turns off automatically

Answer explanation

The correct indication that a projector bulb has completely failed is when the bulb health warning indicator lights up.

Which type of cable might not be sufficient for a 4K resolution display due to quality requirements?

• High Speed rated HDMI cable

• Basic HDMI cable

• VGA cable

• DVI cable

Answer explanation

A Basic HDMI cable might not be sufficient for a 4K resolution display due to quality requirements, as it may not support the necessary bandwidth and specifications for high-quality display output.

What technology does a DLP projector use to project images?

• Cathode ray tube (CRT)

• Liquid crystal display (LCD)

• Digital light processing (DLP)

• LED array

Answer explanation

A DLP projector uses Digital Light Processing (DLP) technology to project images.

What is a common cause of intermittent projector shutdown issues?

• Software corruption

• Overheating

• Loose video cables

• Faulty power supply

Answer explanation

Overheating is a common cause of intermittent projector shutdown issues as it can lead to the projector automatically shutting down to prevent damage.