The write-back cache policy updates main memory: MCQ with Answer and Explanation

Question

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The write-back cache policy updates main memory:

A. Only on read

B. When the cache line is evicted

C. Immediately on every write

D. Never

Answer: Option B

Solution (By JKSSB Mock Tests)

It minimizes memory traffic.

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

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Question #1

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The main bottleneck in many systems is:

A. ALU only

B. Registers

C. CPU speed always

D. Memory access speed (von Neumann bottleneck)

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Correct Answer: Option D

Explanation:
Shared memory access can limit performance.

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

Question #2

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Which company leads in discrete GPU but also makes CPUs?

A. Focus on one

B. NVIDIA has CPUs too but AMD/Intel primary

C. None

D. All do equally

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Correct Answer: Option B

Explanation:
AMD integrates well with Radeon.

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

Question #3

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Address bus width determines:

A. ALU operations

B. Clock frequency

C. Data transfer rate

D. Maximum addressable memory

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Correct Answer: Option D

Explanation:
More address lines allow accessing larger memory space.

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

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