Speculative execution in CPU: MCQ with Answer and Explanation

Question

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Speculative execution in CPU:

A. Executes instructions before knowing if needed

B. Waits for all conditions

C. Reduces cores

D. Increases latency

Answer: Option A

Solution (By JKSSB Mock Tests)

It improves performance but can have security implications like Spectre.

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

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Question #1

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Secure Boot is supported by CPU through:

A. Cache encryption

B. ALU modifications

C. Hardware root of trust

D. Software only

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Correct Answer: Option C

Explanation:
Like TPM integration.

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

Question #2

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What is the role of the Instruction Register?

A. Performs logic operations

B. Controls clock speed

C. Holds the current instruction being executed

D. Holds address of data

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Correct Answer: Option C

Explanation:
It stores the instruction fetched from memory for decoding.

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

Question #3

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The shadow registers or checkpointing is for:

A. Storage

B. Speculative execution recovery

C. Display

D. Normal operations

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Correct Answer: Option B

Explanation:
To rollback on mis-speculation.

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

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