What is the typical power consumption of a 3.5-inch hard disk drive? MCQ with Answer and Explanation

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What is the typical power consumption of a 3.5-inch hard disk drive?

A. About 5-10 watts

B. About 1-2 watts

C. About 20-30 watts

D. About 50 watts

Answer: Option A

Solution (By JKSSB Mock Tests)

A typical 3.5-inch HDD consumes around 5 to 10 watts during operation, while 2.5-inch drives use less (2-3 watts). SSDs consume even less.

This question belongs to: Computer Memory and Storage Devices

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Question #1

Which of the following units is the largest in terms of data storage capacity?

A. Exabyte (EB)

B. Yottabyte (YB)

C. Petabyte (PB)

D. Terabyte (TB)

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Correct Answer: Option B

Explanation:
Among the options, Yottabyte (YB) is the largest. The order is Terabyte < Petabyte < Exabyte < Yottabyte.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the function of a memory queue?

A. To store data permanently

B. To hold pending memory requests

C. To allocate memory

D. To manage cache hits

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Correct Answer: Option B

Explanation:
A memory queue buffers pending memory requests, allowing the memory controller to schedule them efficiently.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which of the following represents an explicit example of an optical disk storage system?

A. Internal RAM Module

B. Solid State Drive

C. Magnetic Spool Tape

D. Digital Versatile Disc (DVD)

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Correct Answer: Option D

Explanation:
Digital Versatile Discs (DVDs) store binary code as physical micro-structures read via focused optical laser pickup assemblies.

This question belongs to: Computer Memory and Storage Devices

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