CPU (Central Processing Unit) MCQs

Practice CPU MCQs with answers and explanations covering ALU, CU, registers, processors and central processing unit concepts frequently asked in competitive exams.

327 Total

Question #101 Report Error

Which is an advantage of multi-core processors?

A. Better multitasking and parallel apps

B. No heat issues

C. Always lower cost

D. Simpler design

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Correct Answer: Option A

Explanation:
They handle multiple tasks more effectively.

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

Question #102 Report Error

The operand in an instruction can be located in:

A. Register, memory, or immediate

B. CU only

C. Only memory

D. Only ALU

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Correct Answer: Option A

Explanation:
Different addressing modes specify operand location.

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

Question #103 Report Error

CPUID instruction is used to:

A. Control display

B. Perform addition

C. Identify processor features and capabilities

D. Access hard disk

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Correct Answer: Option C

Explanation:
Software uses it to detect supported features.

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

Question #104 Report Error

3D V-Cache technology by AMD increases:

A. Clock speed

B. Core count

C. L3 cache capacity using stacked design

D. Power draw

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Correct Answer: Option C

Explanation:
It significantly boosts cache for gaming and workloads.

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

Question #105 Report Error

The write-through cache policy:

A. Reads data

B. Never updates memory

C. Updates cache only

D. Updates both cache and memory simultaneously

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Correct Answer: Option D

Explanation:
Ensures consistency but may increase traffic.

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

Question #106 Report Error

AVX instructions extend:

A. Basic arithmetic only

B. Control unit functions

C. Memory addressing

D. Vector processing capabilities

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Correct Answer: Option D

Explanation:
Advanced Vector Extensions for wider SIMD.

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

Question #107 Report Error

A CPU socket is:

A. Type of register

B. Software program

C. Cache type

D. The physical interface on motherboard

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Correct Answer: Option D

Explanation:
It holds and connects the CPU chip.

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

Question #108 Report Error

Which factor does not directly affect CPU performance?

A. Cache size, cores, clock speed

B. Number of USB ports

C. Architecture efficiency

D. Manufacturing process

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Correct Answer: Option B

Explanation:
USB ports are peripheral and do not impact core processing.

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

Question #109 Report Error

The load-store architecture is typical of:

A. RISC processors

B. No processors

C. Memory only

D. CISC only

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Correct Answer: Option A

Explanation:
Operations are performed on registers after loading from memory.

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

Question #110 Report Error

Error Correcting Code (ECC) memory is supported by some CPUs for:

A. Graphics

B. Detecting and correcting memory errors

C. Audio

D. Increasing speed

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Correct Answer: Option B

Explanation:
Important for servers and reliability.

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

Question #111 Report Error

The retire stage in pipeline:

A. Decodes

B. Commits results of executed instructions

C. Executes only

D. Fetches

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Correct Answer: Option B

Explanation:
It ensures in-order completion where necessary.

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

Question #112 Report Error

Big.LITTLE architecture uses:

A. No cores

B. High performance and efficiency cores together

C. All identical cores

D. Only small cores

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Correct Answer: Option B

Explanation:
Dynamically switches for power and performance balance.

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

Question #113 Report Error

Which is a common heat dissipation method for CPUs?

A. Liquid cooling or air cooling with heatsink

B. Reducing cores

C. Software only

D. Increasing voltage

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Correct Answer: Option A

Explanation:
Essential for maintaining operational temperatures.

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

Question #114 Report Error

The micro-operation (micro-op) is:

A. Low-level operation in complex instructions

B. User command

C. High level code

D. Memory block

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Correct Answer: Option A

Explanation:
CISC instructions are broken into simpler micro-ops.

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

Question #115 Report Error

Zen architecture is associated with:

A. Intel only

B. Qualcomm

C. AMD processors

D. ARM

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Correct Answer: Option C

Explanation:
AMD's microarchitecture family.

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

Question #116 Report Error

The prefetcher in CPU:

A. Performs ALU ops

B. Decodes instructions

C. Anticipates and loads data into cache

D. Manages power

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Correct Answer: Option C

Explanation:
Reduces latency by proactive fetching.

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

Question #117 Report Error

Which of the following is an integrated component in many modern SoCs?

A. Monitor

B. Only CPU

C. CPU, GPU, NPU

D. Hard disk

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Correct Answer: Option C

Explanation:
System on Chip includes multiple processing units.

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

Question #118 Report Error

The scoreboard in CPU is used for:

A. Clock control

B. Storing data

C. Addressing

D. Handling data dependencies in dynamic scheduling

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Correct Answer: Option D

Explanation:
It tracks instruction status for out-of-order execution.

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

Question #119 Report Error

Core i9, Ryzen 9 are examples of:

A. Low power embedded

B. Server only

C. High-end consumer CPUs

D. Mobile phones exclusively

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Correct Answer: Option C

Explanation:
Flagship desktop and laptop processors.

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

Question #120 Report Error

The latency of L1 cache is typically:

A. Infinite

B. Same as RAM

C. Few clock cycles

D. Hundreds of cycles

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Correct Answer: Option C

Explanation:
Very low latency for fast access.

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

CPU (Central Processing Unit) MCQs

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