What is the role of a DMA controller? MCQ with Answer and Explanation

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What is the role of a DMA controller?

A. Audio mixing

B. Direct data transfer bypassing CPU

C. CPU intensive tasks

D. Graphics only

Answer: Option B

Solution (By JKSSB Mock Tests)

Efficiency in I/O.

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Question #1

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Which hardware supports RAID configurations?

A. Motherboard or RAID controller card

B. Keyboard

C. Speaker

D. Monitor

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Correct Answer: Option A

Explanation:
For data redundancy and performance.

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Question #2

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Which scanner type is portable?

A. Flatbed only

B. Film scanner

C. Handheld scanner

D. Drum scanner

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Correct Answer: Option C

Explanation:
Handheld for on-the-go scanning.

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Question #3

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Multifunction printers can perform:

A. Only projection

B. Only scanning

C. Print, scan, copy, and sometimes fax

D. Only printing

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Correct Answer: Option C

Explanation:
All-in-one printers combine multiple functions.

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