The status of 'dirty' bit in cache indicates: MCQ with Answer and Explanation

The status of 'dirty' bit in cache indicates:

A. Clean data

B. Shared data

C. Invalid entry

D. Modified data needing write-back

Answer: Option D

For write-back policy.

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

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Question #1 Report Error

The shadow stack is a security feature for:

A. Power management

B. Data encryption

C. Protecting return addresses

D. Cache protection

Correct Answer: Option C

Explanation:
Against ROP attacks.

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

Question #2 Report Error

The ROB (Reorder Buffer) size affects:

A. How many instructions can be in flight

B. Address bus

C. Power only

D. Cache size

Correct Answer: Option A

Explanation:
Larger ROB supports more out-of-order execution.

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

Question #3 Report Error

L3 cache is typically:

A. Shared among all CPU cores

B. Slower than registers but faster than RAM

C. Used only for instructions

D. Private to each core

Correct Answer: Option A

Explanation:
It acts as a larger shared cache layer.

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