Which of the following storage mediums relies purely on magnetic property manipulation to record digital data? MCQ with Answer and Explanation

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Which of the following storage mediums relies purely on magnetic property manipulation to record digital data?

A. Secure Digital (SD) Card

B. Solid State Drive (SSD)

C. Hard Disk Drive (HDD)

D. Compact Disc (CD)

Answer: Option C

Solution (By JKSSB Mock Tests)

Hard Disk Drives use platters coated with magnetic material and magnetic heads to alter and read polarization patterns representing binary data.

This question belongs to: Computer Memory and Storage Devices

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Question #1

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Which of the following is a type of memory that uses a laser to read data?

A. Pen drive

B. Hard disk

C. CD-ROM

D. SSD

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Correct Answer: Option C

Explanation:
CD-ROM and other optical discs use a laser to read data by detecting reflected light from pits and lands.

This question belongs to: Computer Memory and Storage Devices

Question #2

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What is the function of a memory stick (pen drive) in terms of storage?

A. It is a removable flash storage device

B. It is a magnetic storage medium

C. It is a type of optical disc

D. It is a type of RAM

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Correct Answer: Option A

Explanation:
A pen drive (USB flash drive) is a removable storage device using flash memory, non-volatile and portable.

This question belongs to: Computer Memory and Storage Devices

Question #3

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Which of the following is used to measure the data transfer rate of a memory bus?

A. Bytes per second

B. Bits per second

C. Hertz

D. Both A and B

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Correct Answer: Option D

Explanation:
Data transfer rate can be expressed in bytes per second (e.g., MB/s) or bits per second (e.g., Mbps), and the bus clock is in Hz. But the rate is typically Bps or bps.

This question belongs to: Computer Memory and Storage Devices

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