What is the role of the Instruction Register? MCQ with Answer and Explanation

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What is the role of the Instruction Register?

A. Holds address of data

B. Performs logic operations

C. Controls clock speed

D. Holds the current instruction being executed

Answer: Option D

Solution (By JKSSB Mock Tests)

It stores the instruction fetched from memory for decoding.

This question belongs to: Computer CPU (Central Processing Unit)

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Question #1

AES-NI is an example of:

A. Hardware acceleration for encryption

B. Networking

C. Graphics feature

D. Memory management

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Correct Answer: Option A

Explanation:
It speeds up cryptographic operations in CPU.

This question belongs to: Computer CPU (Central Processing Unit)

Question #2

Which is true about CPU temperature management?

A. Handled only by software

B. Not important

C. Requires heat sinks and fans

D. Irrelevant for performance

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Correct Answer: Option C

Explanation:
Proper cooling is essential to prevent throttling and damage.

This question belongs to: Computer CPU (Central Processing Unit)

Question #3

In CPU, 'retirement' refers to:

A. Committing instruction results to architectural state

B. Fetching instructions

C. Memory access

D. Decoding phase

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Correct Answer: Option A

Explanation:
It completes the instruction lifecycle.

This question belongs to: Computer CPU (Central Processing Unit)

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