Which of the following is a volatile memory? MCQ with Answer and Explanation

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Which of the following is a volatile memory?

A. Hard disk

B. CD-ROM

C. ROM

D. RAM

Answer: Option D

Solution (By JKSSB Mock Tests)

RAM (Random Access Memory) is volatile, meaning it loses its contents when power is turned off. ROM, hard disk, and CD-ROM are non-volatile.

This question belongs to: Computer Memory and Storage Devices

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Question #1

What does 'S' stand for in the context of SD cards used in smartphones and cameras?

A. Secure Digital

B. Static Digital

C. Speed Digital

D. Serial Digital

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Correct Answer: Option A

Explanation:
SD card stands for Secure Digital card, a proprietary non-volatile memory card format developed for portable devices.

This question belongs to: Computer Memory and Storage Devices

Question #2

What is the typical data transfer rate of a USB 3.1 Gen 1 (same as USB 3.0) port?

A. 5 Gbps

B. 20 Gbps

C. 480 Mbps

D. 10 Gbps

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Correct Answer: Option A

Explanation:
USB 3.1 Gen 1 is the same as USB 3.0 and has a max rate of 5 Gbps. USB 3.1 Gen 2 is 10 Gbps, USB 3.2 Gen 2x2 is 20 Gbps.

This question belongs to: Computer Memory and Storage Devices

Question #3

What type of storage is a computer's main memory (RAM) categorized as?

A. Primary Volatile Storage

B. Primary Non-volatile Storage

C. Secondary Volatile Storage

D. Tertiary Non-volatile Storage

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Correct Answer: Option A

Explanation:
RAM is directly accessible by the CPU (making it primary memory) and requires power to maintain data (making it volatile).

This question belongs to: Computer Memory and Storage Devices

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