Speculative execution in CPU: MCQ with Answer and Explanation

Speculative execution in CPU:

A. Increases latency

B. Executes instructions before knowing if needed

C. Reduces cores

D. Waits for all conditions

Answer: Option B

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 Report Error

Which helps mitigate Spectre attacks?

A. More cores

B. Larger cache

C. Higher TDP

D. Hardware fences and speculation barriers

Correct Answer: Option D

Explanation:
Processor and OS level mitigations.

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

Question #2 Report Error

Heterogeneous System Architecture (HSA) promotes:

A. No sharing

B. Seamless CPU-GPU integration

C. Software incompatibility

D. Separation of units

Correct Answer: Option B

Explanation:
Unified memory and programming.

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

Question #3 Report Error

The ring bus or mesh interconnect is used in:

A. Multi-core CPU communication

B. External devices

C. Keyboards

D. Printers

Correct Answer: Option A

Explanation:
For efficient data sharing between cores.

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