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Computer Hardware

Computer Hardware
What is modified when changing the system start-up boot sequence?

BIOS/CMOS
autoexec.bat
None of these
CONFIG.SYS
COMMAND.COM

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Computer Hardware
When is the risk for electrostatic discharge the greatest?

Day time
High humidity
Night time
Low humidity

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Computer Hardware
An IRQ allow interface cards to:

Interrupt the CPU to request service
Pass data from one card to another
Pass data to the CPU to be processed
Pass data to the computers memory

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Computer Hardware
On a dot-matrix printer, regular lube maintenance should be followed, but this component should never be lubed:

Platten bearings
Carriage rails
None of these
Paper advance bearings
Printhead

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Computer Hardware
How many DMA channels are there in an AT class PC?

8
4
None of these
7
3

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Computer Hardware
During preventative maintenance on a dot matrix printer, do NOT lubricate:

Print head pulley
Paper advance gear bushings
Platen assembly
Print head pins

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