CPU (Central Processing Unit) MCQs

Computer

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 Questions

Practice Questions

Page 6 of 17
Question #101
Which is an advantage of multi-core processors?
A. Simpler design
B. No heat issues
C. Always lower cost
D. Better multitasking and parallel apps
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Correct Answer: Option D

Explanation:
They handle multiple tasks more effectively.
This question belongs to: Computer CPU (Central Processing Unit)
Question #102
The operand in an instruction can be located in:
A. Register, memory, or immediate
B. Only memory
C. CU only
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
CPUID instruction is used to:
A. Identify processor features and capabilities
B. Access hard disk
C. Perform addition
D. Control display
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Correct Answer: Option A

Explanation:
Software uses it to detect supported features.
This question belongs to: Computer CPU (Central Processing Unit)
Question #104
3D V-Cache technology by AMD increases:
A. Core count
B. Clock speed
C. Power draw
D. L3 cache capacity using stacked design
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Correct Answer: Option D

Explanation:
It significantly boosts cache for gaming and workloads.
This question belongs to: Computer CPU (Central Processing Unit)
Question #105
The write-through cache policy:
A. Never updates memory
B. Updates cache only
C. Reads data
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
AVX instructions extend:
A. Control unit functions
B. Vector processing capabilities
C. Memory addressing
D. Basic arithmetic only
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Correct Answer: Option B

Explanation:
Advanced Vector Extensions for wider SIMD.
This question belongs to: Computer CPU (Central Processing Unit)
Question #107
A CPU socket is:
A. Cache type
B. Type of register
C. The physical interface on motherboard
D. Software program
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Correct Answer: Option C

Explanation:
It holds and connects the CPU chip.
This question belongs to: Computer CPU (Central Processing Unit)
Question #108
Which factor does not directly affect CPU performance?
A. Cache size, cores, clock speed
B. Manufacturing process
C. Architecture efficiency
D. Number of USB ports
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Correct Answer: Option D

Explanation:
USB ports are peripheral and do not impact core processing.
This question belongs to: Computer CPU (Central Processing Unit)
Question #109
The load-store architecture is typical of:
A. CISC only
B. No processors
C. Memory only
D. RISC processors
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Correct Answer: Option D

Explanation:
Operations are performed on registers after loading from memory.
This question belongs to: Computer CPU (Central Processing Unit)
Question #110
Error Correcting Code (ECC) memory is supported by some CPUs for:
A. Increasing speed
B. Detecting and correcting memory errors
C. Graphics
D. Audio
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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
The retire stage in pipeline:
A. Fetches
B. Commits results of executed instructions
C. Executes only
D. Decodes
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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
Big.LITTLE architecture uses:
A. No cores
B. All identical cores
C. High performance and efficiency cores together
D. Only small cores
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Correct Answer: Option C

Explanation:
Dynamically switches for power and performance balance.
This question belongs to: Computer CPU (Central Processing Unit)
Question #113
Which is a common heat dissipation method for CPUs?
A. Software only
B. Reducing cores
C. Liquid cooling or air cooling with heatsink
D. Increasing voltage
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Correct Answer: Option C

Explanation:
Essential for maintaining operational temperatures.
This question belongs to: Computer CPU (Central Processing Unit)
Question #114
The micro-operation (micro-op) is:
A. Low-level operation in complex instructions
B. User command
C. Memory block
D. High level code
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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
Zen architecture is associated with:
A. ARM
B. Qualcomm
C. Intel only
D. AMD processors
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Correct Answer: Option D

Explanation:
AMD's microarchitecture family.
This question belongs to: Computer CPU (Central Processing Unit)
Question #116
The prefetcher in CPU:
A. Anticipates and loads data into cache
B. Decodes instructions
C. Manages power
D. Performs ALU ops
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Correct Answer: Option A

Explanation:
Reduces latency by proactive fetching.
This question belongs to: Computer CPU (Central Processing Unit)
Question #117
Which of the following is an integrated component in many modern SoCs?
A. Only CPU
B. Hard disk
C. Monitor
D. CPU, GPU, NPU
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Correct Answer: Option D

Explanation:
System on Chip includes multiple processing units.
This question belongs to: Computer CPU (Central Processing Unit)
Question #118
The scoreboard in CPU is used for:
A. Handling data dependencies in dynamic scheduling
B. Clock control
C. Addressing
D. Storing data
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Correct Answer: Option A

Explanation:
It tracks instruction status for out-of-order execution.
This question belongs to: Computer CPU (Central Processing Unit)
Question #119
Core i9, Ryzen 9 are examples of:
A. Mobile phones exclusively
B. Server only
C. High-end consumer CPUs
D. Low power embedded
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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
The latency of L1 cache is typically:
A. Few clock cycles
B. Infinite
C. Same as RAM
D. Hundreds of cycles
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Correct Answer: Option A

Explanation:
Very low latency for fast access.
This question belongs to: Computer CPU (Central Processing Unit)

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