Which company developed the x86-64 architecture extension? MCQ with Answer and Explanation

Question

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Which company developed the x86-64 architecture extension?

A. Qualcomm

B. AMD

C. Intel only

D. ARM

Answer: Option B

Solution (By JKSSB Mock Tests)

AMD64 extended the original x86.

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

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Question #1

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Which register is used to store the return address during subroutine calls?

A. Program Counter

B. Accumulator

C. Flag Register

D. Link Register

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Correct Answer: Option D

Explanation:
Link Register (in many architectures) holds the return address.

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

Question #2

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The Instruction Decode Queue (IDQ) holds:

A. Decoded micro-operations

B. Memory addresses

C. Results

D. Raw instructions

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Correct Answer: Option A

Explanation:
It feeds the execution engine.

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

Question #3

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The predictor in branch prediction can be:

A. No predictor

B. Software irrelevant

C. Only hardware

D. Static or dynamic

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Correct Answer: Option D

Explanation:
Dynamic uses history for accuracy.

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

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