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 5 of 17
Question #81
The opcode in an instruction specifies the:
A. Data value
B. Register number only
C. Operation to be performed
D. Address
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Opcode tells the CPU what action to take.
This question belongs to: Computer CPU (Central Processing Unit)
Question #82
Dynamic voltage scaling is used to:
A. Optimize power consumption
B. Increase heat
C. Reduce cores
D. Fix clock speed
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
Adjusts voltage and frequency based on workload.
This question belongs to: Computer CPU (Central Processing Unit)
Question #83
Which is a common CPU manufacturer?
A. Samsung only for memory
B. Dell
C. Intel
D. Canon
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Intel is a leading producer of x86 processors.
This question belongs to: Computer CPU (Central Processing Unit)
Question #84
The concept of 'dark silicon' refers to:
A. Faulty transistors
B. External connectors
C. Unused portions of chip due to power constraints
D. Cache memory
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Power limits prevent using all transistors at full speed.
This question belongs to: Computer CPU (Central Processing Unit)
Question #85
SIMD instructions are useful in:
A. Networking
B. Database sorting only
C. Graphics and multimedia processing
D. Simple text editing
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
They process multiple data elements with one instruction.
This question belongs to: Computer CPU (Central Processing Unit)
Question #86
The bus arbitration is handled to:
A. Store data
B. Decode instructions
C. Prevent conflicts on shared bus
D. Increase ALU speed
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
It manages access rights for multiple devices.
This question belongs to: Computer CPU (Central Processing Unit)
Question #87
A CPU's process node size (like 7nm) refers to:
A. Cache size
B. Clock speed
C. Number of pins
D. Manufacturing technology affecting density and efficiency
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option D

Explanation:
Smaller nodes allow more transistors and lower power.
This question belongs to: Computer CPU (Central Processing Unit)
Question #88
Which component interfaces CPU with other parts of motherboard?
A. Internal bus only
B. ALU
C. Registers
D. Chipset
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option D

Explanation:
Chipset provides communication pathways.
This question belongs to: Computer CPU (Central Processing Unit)
Question #89
Virtualization support in CPU includes instructions for:
A. Efficient VM management
B. Graphics only
C. Storage encryption
D. Audio processing
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
Extensions like Intel VT-x or AMD-V.
This question belongs to: Computer CPU (Central Processing Unit)
Question #90
The fetch stage involves:
A. Decoding only
B. Executing math
C. Retrieving instruction using Program Counter
D. Writing back results
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
PC is used to fetch from memory.
This question belongs to: Computer CPU (Central Processing Unit)
Question #91
Which is not typically inside the CPU die?
A. L1 Cache
B. ALU
C. Control Unit
D. Main RAM
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option D

Explanation:
Main RAM is separate from the processor chip.
This question belongs to: Computer CPU (Central Processing Unit)
Question #92
AES-NI is an example of:
A. Networking
B. Hardware acceleration for encryption
C. Graphics feature
D. Memory management
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option B

Explanation:
It speeds up cryptographic operations in CPU.
This question belongs to: Computer CPU (Central Processing Unit)
Question #93
The term 'IPC' in CPU performance stands for:
A. Input Per Core
B. Internal Processing Cache
C. Instructions Per Cycle
D. Integrated Peripheral Controller
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
Higher IPC means better efficiency per clock.
This question belongs to: Computer CPU (Central Processing Unit)
Question #94
Power gating is a technique to:
A. Overclock
B. Increase voltage
C. Shut down unused parts of CPU to save power
D. Add more ALUs
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
It reduces leakage power in idle sections.
This question belongs to: Computer CPU (Central Processing Unit)
Question #95
Which register is updated after every instruction fetch?
A. MBR
B. Accumulator
C. Program Counter
D. Flag register
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
PC is incremented to point to next instruction.
This question belongs to: Computer CPU (Central Processing Unit)
Question #96
Heterogeneous computing involves:
A. Memory focus
B. Software only
C. Only one type of processor
D. CPU and GPU working together
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option D

Explanation:
Combining different processing units for efficiency.
This question belongs to: Computer CPU (Central Processing Unit)
Question #97
The ring bus or mesh interconnect is used in:
A. Keyboards
B. External devices
C. Multi-core CPU communication
D. Printers
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option C

Explanation:
For efficient data sharing between cores.
This question belongs to: Computer CPU (Central Processing Unit)
Question #98
Which of the following is a security feature in modern CPUs?
A. Larger RAM
B. SGX or TrustZone
C. Higher clock only
D. More pins
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option B

Explanation:
They provide isolated execution environments.
This question belongs to: Computer CPU (Central Processing Unit)
Question #99
The decode stage translates:
A. Data to address
B. High level language
C. Output to input
D. Machine code to control signals
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option D

Explanation:
It interprets the binary instruction.
This question belongs to: Computer CPU (Central Processing Unit)
Question #100
Boost clock refers to:
A. Temporary increase in CPU frequency
B. Bus width
C. Memory speed
D. Decrease in speed
Discuss
Get Complete Subject PDF for Computer

Correct Answer: Option A

Explanation:
Auto overclocking under load for performance.
This question belongs to: Computer CPU (Central Processing Unit)

More Computer Topics

Computer Abbreviations MCQs
Computer Fundamentals MCQs
Computer Hardware MCQs
Computer Networking MCQs
Computer Software MCQs
Cyber Security MCQs
Database Management System (DBMS) MCQs
Internet and Web Technologies MCQs
Memory and Storage Devices MCQs
Microsoft Office MCQs
Operating Systems MCQs
Programming Languages MCQs
Today's Top Topics
Microsoft Office 1199 Memory and Storage Devices 438 Internet and Web Technologies 461 Database Management System (DBMS) 278 Computer Networking 325
Explore Subjects
Current Affairs 575 Maths 5575 Static General Knowledge 6362 Economy GK 2220 Geography GK 6121
Practice Mix
She ___ a great singer.
Which national park in Madhya Pradesh has the 'Mandla Plant Fossils'?
Who was the first woman to command a space mission?
In a school, 60% are boys and 40% are girls. 20% of boys and 25% of girls get scholarship. What percent of students do not get scholarship?
Which of the following is a characteristic of 'Reference-Dependent Preferences'?