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 #141 Report Error

Which architecture is dominant in personal computers?

A. Only ARM

B. PowerPC exclusively

C. x86 / x86-64

D. MIPS only

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Correct Answer: Option C

Explanation:
Used by Intel and AMD for PCs.

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

Question #142 Report Error

The commit stage ensures:

A. Decode only

B. ALU idle

C. Architectural state is updated correctly

D. Fetch happens first

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Correct Answer: Option C

Explanation:
Finalizes results in program order.

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

Question #143 Report Error

AI accelerators integrated in CPUs target:

A. Inference and training workloads

B. Video playback only

C. File storage

D. Basic addition

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Correct Answer: Option A

Explanation:
For on-device AI processing.

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

Question #144 Report Error

The associativity of cache affects:

A. Hit rate and complexity

B. Clock speed

C. Voltage

D. Core count

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Correct Answer: Option A

Explanation:
Higher associativity reduces conflicts.

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

Question #145 Report Error

Which is a recent trend in CPU design (2026)?

A. Removing caches

B. Increased focus on AI and efficiency with chiplets

C. Decreasing transistor count

D. Single core only

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Correct Answer: Option B

Explanation:
Chiplet designs and AI integration are prominent.

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

Question #146 Report Error

The bypass or forwarding in pipeline resolves:

A. All hazards equally

B. Control hazards

C. Structural hazards

D. Data hazards

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Correct Answer: Option D

Explanation:
Provides results directly to dependent instructions.

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

Question #147 Report Error

Which company is known for high core count server CPUs?

A. Printer companies

B. AMD with EPYC

C. Software firms

D. Basic desktop makers

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Correct Answer: Option B

Explanation:
Competing in data center market.

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

Question #148 Report Error

The physical address is generated from:

A. Direct from registers

B. CU only

C. Virtual address via MMU

D. ALU output

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Correct Answer: Option C

Explanation:
Memory Management Unit handles translation.

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

Question #149 Report Error

TDP and PL (Power Limit) are managed by:

A. User manually always

B. No management

C. Firmware and OS for CPU power

D. Hardware fixed

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Correct Answer: Option C

Explanation:
Dynamic power management techniques.

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

Question #150 Report Error

Which of the following improves single-threaded performance significantly?

A. Larger secondary storage

B. Higher clock speeds and better IPC

C. More slow cores

D. More USB ports

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Correct Answer: Option B

Explanation:
Key for many applications not parallelized.

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

Question #151 Report Error

The coherence protocol like MESI is for:

A. Cache coherence in multi-core systems

B. Power saving

C. ALU operations

D. Instruction fetch

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Correct Answer: Option A

Explanation:
Maintains consistent data across caches.

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

Question #152 Report Error

Future CPUs may increasingly use:

A. No integration

B. Larger single dies only

C. 3D stacking and advanced packaging

D. Analog processing

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Correct Answer: Option C

Explanation:
For higher density and performance.

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

Question #153 Report Error

The issue stage in pipeline:

A. Dispatches instructions to execution units

B. Decodes only

C. Writes results

D. Fetches from memory

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Correct Answer: Option A

Explanation:
Assigns to appropriate functional units.

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

Question #154 Report Error

Which is essential for real-time systems in CPUs?

A. High power

B. Predictable low latency response

C. Large cache irrelevant

D. Maximum throughput only

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Correct Answer: Option B

Explanation:
Deterministic behavior important.

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

Question #155 Report Error

The last level cache (LLC) is usually:

A. Per core private only

B. Non-existent

C. External

D. Shared among cores

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Correct Answer: Option D

Explanation:
L3 or higher levels shared.

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

Question #156 Report Error

Instruction Set Architecture (ISA) defines:

A. The interface between hardware and software

B. Manufacturing process

C. Physical layout

D. Cooling method

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Correct Answer: Option A

Explanation:
Like x86, ARM specify instructions.

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

Question #157 Report Error

Which helps in debugging CPU issues?

A. Screen resolution

B. Keyboard input

C. Only visual inspection

D. Performance Monitoring Counters (PMCs)

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Correct Answer: Option D

Explanation:
Hardware counters for profiling.

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

Question #158 Report Error

Chiplet design allows:

A. No scalability

B. Higher costs always

C. Modular manufacturing and better yields

D. Single large die only

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Correct Answer: Option C

Explanation:
Used in modern high-end processors.

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

Question #159 Report Error

The execution unit in CPU may include:

A. No units

B. Single unit only

C. Memory only

D. Multiple specialized ALUs and FPUs

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Correct Answer: Option D

Explanation:
For different types of operations.

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

Question #160 Report Error

Which is a benefit of smaller process nodes?

A. Lower power, higher density

B. Slower speeds

C. Higher leakage always

D. Larger chips

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Correct Answer: Option A

Explanation:
Improved efficiency and performance.

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

CPU (Central Processing Unit) MCQs

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