Which memory technology is typically used for cache memory? MCQ with Answer and Explanation

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Which memory technology is typically used for cache memory?

A. Flash

B. SDRAM

C. SRAM

D. DRAM

Answer: Option C

Solution (By JKSSB Mock Tests)

Cache memory is built using SRAM (Static RAM) because it is faster and does not need refreshing, though it is more expensive per bit than DRAM.

This question belongs to: Computer Memory and Storage Devices

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Question #1

Which of the following is a disadvantage of an SSD compared to an HDD?

A. Slower random access

B. Higher cost per GB

C. Higher power consumption

D. Noisier operation

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Correct Answer: Option B

Explanation:
SSDs are more expensive per gigabyte than HDDs, though prices have been decreasing. They are quieter, use less power, and have faster random access.

This question belongs to: Computer Memory and Storage Devices

Question #2

Which unit of storage represents exactly $2^{40}$ bytes of data?

A. 1 Terabyte

B. 1 Petabyte

C. 1 Gigabyte

D. 1 Megabyte

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Correct Answer: Option A

Explanation:
$2^{10}$ is Kilobyte, $2^{20}$ is Megabyte, $2^{30}$ is Gigabyte, and $2^{40}$ is Terabyte. Thus, $2^{40}$ bytes equals 1 Terabyte (TB).

This question belongs to: Computer Memory and Storage Devices

Question #3

What is the typical capacity of a single-layer BD-R (Blu-ray recordable) disc?

A. 4.7 GB

B. 25 GB

C. 128 GB

D. 50 GB

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Correct Answer: Option B

Explanation:
Single-layer BD-R holds 25 GB, dual-layer 50 GB, and triple-layer 100 GB or more. Standard Blu-ray is 25 GB.

This question belongs to: Computer Memory and Storage Devices

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