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IT 105 Final GMU Questions and Answers

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  • August 15, 2024
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IT 105 Final GMU Questions and
Answers
Expansion Ports

✓ ~~~ Ports in the system unit of digital devices used for connecting cables and various
add-ons to expand the options for input , output, and storage



Local Bus

✓ ~~~ Carries data at high speeds between the processor and RAM



Expansion Bus

✓ ~~~ Carries data between RAM and external devices that are connected to ports on the
system unit



Hot-Plugging

✓ ~~~ When a peripheral device is connected or disconnected while the host device is
operating



Bluetooth

✓ ~~~ A common wireless technology for connecting peripherals



What makes Bluetooth good for mobile devices?

✓ ~~~ It low-power so it is ideal for mobile devices that don't have big batteries



Bluetooth's Range:

✓ ~~~ 30 feet



Bluetooth's Transfer Speed:

, ✓ ~~~ Slow compared to wired connections (~3Mbps)



USB 2.0 Transfer Speed:

✓ ~~~ ~480 Mbps



FireWire Transfer Speed:

✓ ~~~ ~800 Mbps



USB 3.0 Transfer Speed:

✓ ~~~ ~5Gbps



Thunderbolt Transfer Speed:

✓ ~~~ ~10 Gbps



Device Driver

✓ ~~~ Software that helps a peripheral device establish communication with its host device



Computer Display

✓ ~~~ A device that simply displays text and images



A computer display is classified as a(n):

✓ ~~~ Output device



Touchscreens are classified as

✓ ~~~ Both input and output devices

,Display devices can be

✓ ~~~ Standalone display devices, sometimes called monitors, are popular for desktop
computers.



OR




Built-in display devices for laptops, tablets, and handheld devices, but these devices

may also accept a standalone display device




LCD(Liquid Crystal Display) Technology:

✓ ~~~ Technology that produces an image by filtering light from a backlight through a layer
of liquid crystal cells(One Red, One Blue, and One Green crystal)



LED(Light-Emitting Diode) Technology:

✓ ~~~ Uses LEDs as the video display. This technology is replacing CCFL backlighting
technology



Advantages of LCD Screens:

✓ ~~~ -Display Clarity
-Low Radiation Emission

-Portability

-Compactness




What is the source of backlighting in a LCD screen?

, ✓ ~~~ Cold Cathode Florescent Lamp (CCFL)



The liquid crystal cells used in display devices do not directly emit light, so ____ is

necessary.

✓ ~~~ Backlighting



Factors that affect image quality:

✓ ~~~ Screen size, response rate, dot pitch, and screen resolution



Screen Size

✓ ~~~ The measurement in inches from one corner of the screen diagonally across to the
opposite corner



Response Rate

✓ ~~~ The time it takes for one pixel to change from black to white then back to black



Display devices with fast response rates display a crisp image with minimal ______?

✓ ~~~ Blurring or "ghosting" of moving objects



What is Response Rate measured in?

✓ ~~~ Milliseconds



For gaming systems, a response rate of ____ or less is desirable.

✓ ~~~ 5ms



Dot Pitch (dp)

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