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 50 watts

B. About 1-2 watts

C. About 5-10 watts

D. About 20-30 watts

Answer: Option C

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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Practice More Memory and Storage Devices Questions

Question #1

How many bits are contained in a standard hexademical digit stored in computer memory?

A. 16 bits

B. 4 bits

C. 2 bits

D. 8 bits

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Correct Answer: Option B

Explanation:
A single hexadecimal character represents values from 0 to 15, which maps to a 4-bit binary sequence (a nibble).

This question belongs to: Computer Memory and Storage Devices

Question #2

Which of the following is a characteristic of a hard disk's cylinder?

A. A single track on one platter

B. A storage area for file allocation table

C. A set of tracks that are at the same radial position on all platters

D. A group of sectors

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Correct Answer: Option C

Explanation:
A cylinder consists of the same track number on each platter in a hard disk drive, all at the same distance from the center. This allows the heads to access data without moving.

This question belongs to: Computer Memory and Storage Devices

Question #3

Which program is systematically executed from ROM the instant a standard personal computer is turned on?

A. Disk Defragmenter

B. Microsoft Word

C. The Windows Task Manager

D. POST (Power-On Self-Test)

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Correct Answer: Option D

Explanation:
The POST (Power-On Self-Test) routine is hardcoded into the system BIOS/UEFI ROM and runs instantly at startup to verify that essential hardware components are operational.

This question belongs to: Computer Memory and Storage Devices

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