Computer Hardware – Section 3

16. The floppy drive uses which DMA (direct memory access) channel?

A. 5
B. 4
C. 1
D. 9
E. 2

Correct Answer: E. 2

17. The DC voltage on most circuit boards is:

A. -12 volts
B. 0 volts
C. +5 volts
D. +12 volts
E. None of the above

Correct Answer: C. +5 volts

18. A customer attached an external drive to his notebook computer but the computer is not recognizing it. What should be considered?

A. The cables are attached firmly
B. The external drive has been pre¬loaded with the appropriate software
C. The external drive was attached before the computer was on
D. The external drive is turned on
E.  All of the above

Correct Answer: E. All of the above

19. “Parity” errors usually indicate bad memory.

A. True
B. False

Correct Answer: A. True

20. What device protects against line deficiencies?

A. Surge protector
B. UPS
C. Logic probe
D. Capacitor
E. None of the above

Correct Answer: B. UPS

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