Central Processing Unit (CPU) MCQs

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1. : What is the primary function of the Central Processing Unit (CPU)?
(A) To store data
(B) To execute instructions and process data
(C) To manage power supply
(D) To render graphics

2. : Which component within the CPU is responsible for performing arithmetic and logical operations?
(A) Control Unit
(B) Arithmetic Logic Unit (ALU)
(C) Registers
(D) Cache

3. : What does the Control Unit (CU) of the CPU do?
(A) Perform arithmetic operations
(B) Direct and coordinate the activities of other CPU components
(C) Store frequently used data
(D) Manage external devices

4. : Which CPU component temporarily holds data and instructions during processing?
(A) ALU
(B) Register
(C) Cache
(D) Memory

5. : What is the purpose of CPU cache?
(A) To provide long-term data storage
(B) To speed up access to frequently used data and instructions
(C) To manage power supply
(D) To handle external device connections

6. : Which unit in the CPU is responsible for managing and executing instructions?
(A) Arithmetic Logic Unit (ALU)
(B) Control Unit (CU)
(C) Register
(D) Cache

7. : What is the function of a CPU register?
(A) To perform arithmetic operations
(B) To store data temporarily for quick access during processing
(C) To manage memory
(D) To connect external devices

8. : What does the term ‘clock speed’ refer to in relation to the CPU?
(A) The number of cores in the CPU
(B) The amount of cache memory
(C) The frequency at which the CPU executes instructions
(D) The size of the CPU chip

9. : Which type of CPU architecture uses multiple cores to perform parallel processing?
(A) Single-core
(B) Dual-core
(C) Multi-core
(D) Hyper-threaded

10. : What is the purpose of the CPU’s instruction set architecture (ISA)?
(A) To provide power to the CPU
(B) To define the set of instructions that the CPU can execute
(C) To manage data storage
(D) To connect external peripherals

11. : What does the term ‘hyper-threading’ refer to in CPU technology?
(A) The ability of a CPU to handle multiple threads simultaneously
(B) The speed at which the CPU executes instructions
(C) The size of the CPU cache
(D) The number of cores in the CPU

12. : Which component of the CPU is responsible for controlling the flow of data between the CPU and other hardware components?
(A) Arithmetic Logic Unit (ALU)
(B) Control Unit (CU)
(C) Register
(D) Cache

13. : Which of the following is a common unit of measurement for CPU clock speed?
(A) Bytes
(B) Hertz (Hz)
(C) Megabytes (MB)
(D) Gigabytes (GB)

14. : What is the main role of the Arithmetic Logic Unit (ALU) in the CPU?
(A) To perform mathematical and logical operations
(B) To manage memory
(C) To control external devices
(D) To store data temporarily

15. : Which type of CPU cache is the smallest and fastest, located closest to the CPU core?
(A) L1 Cache
(B) L2 Cache
(C) L3 Cache
(D) L4 Cache

16. : What does the term ‘multi-core’ refer to in CPUs?
(A) A CPU with multiple cache levels
(B) A CPU with more than one processing unit (core)
(C) A CPU with higher clock speed
(D) A CPU with hyper-threading capabilities

17. : Which CPU component is responsible for fetching and decoding instructions?
(A) Arithmetic Logic Unit (ALU)
(B) Control Unit (CU)
(C) Register
(D) Cache

18. : What is the role of the CPU’s fetch-decode-execute cycle?
(A) To manage data storage
(B) To execute and process instructions in a sequence
(C) To connect external devices
(D) To manage power supply

19. : Which component in a CPU helps in improving performance by reducing the time required to access frequently used data?
(A) Register
(B) Cache
(C) ALU
(D) Control Unit

20. : What does the term ‘overclocking’ mean in the context of CPU performance?
(A) Increasing the clock speed of the CPU beyond its standard specifications
(B) Adding more cores to the CPU
(C) Increasing the size of the CPU cache
(D) Enhancing the CPU’s power efficiency

21. : Which type of CPU architecture includes multiple cores on a single chip to handle more tasks simultaneously?
(A) Single-core
(B) Dual-core
(C) Multi-core
(D) Hyper-threaded

22. : What is the function of the CPU’s arithmetic logic unit (ALU)?
(A) To handle graphics rendering
(B) To execute instructions from memory
(C) To perform arithmetic and logical operations
(D) To manage data transfer

23. : Which CPU component stores the address of the next instruction to be executed?
(A) Program Counter
(B) Accumulator
(C) Stack Pointer
(D) Instruction Register

24. : What is the purpose of the CPU’s instruction register?
(A) To hold the address of the next instruction
(B) To store the current instruction being executed
(C) To manage external devices
(D) To provide power to the CPU

25. : Which CPU technology allows a single core to handle multiple threads of execution simultaneously?
(A) Multi-core
(B) Hyper-threading
(C) Overclocking
(D) Virtualization

26. : What is the role of the CPU’s system bus?
(A) To manage power supply
(B) To connect and transfer data between the CPU and other hardware components
(C) To store data
(D) To render graphics

27. : What does the term ‘system clock’ refer to in CPU operations?
(A) The speed of the CPU’s clock cycle
(B) The number of cores in the CPU
(C) The size of the CPU cache
(D) The type of CPU architecture

28. : Which part of the CPU handles the coordination of data flow within the computer system?
(A) Arithmetic Logic Unit (ALU)
(B) Control Unit (CU)
(C) Register
(D) Cache

29. : What is the main purpose of CPU registers?
(A) To store data temporarily during processing
(B) To manage power supply
(C) To connect external devices
(D) To render graphics

30. : Which CPU feature allows multiple instructions to be processed simultaneously?
(A) Multi-core
(B) Hyper-threading
(C) Overclocking
(D) Virtualization

31. : What does the ‘clock cycle’ of a CPU refer to?
(A) The amount of time it takes to process a single instruction
(B) The frequency of the CPU’s clock signal
(C) The number of cores in the CPU
(D) The size of the CPU cache

32. : Which type of CPU memory is the fastest and closest to the CPU core?
(A) L1 Cache
(B) L2 Cache
(C) L3 Cache
(D) Main Memory

33. : Which component of the CPU is responsible for executing arithmetic and logical operations?
(A) Control Unit (CU)
(B) Arithmetic Logic Unit (ALU)
(C) Register
(D) Cache

34. : What is the role of the CPU’s ALU in handling data?
(A) To execute instructions
(B) To store data
(C) To perform arithmetic and logical operations
(D) To manage power

35. : Which of the following is a common unit for measuring CPU clock speed?
(A) Gigabytes (GB)
(B) Hertz (Hz)
(C) Megabytes (MB)
(D) Bytes

36. : Which of the following is an example of a CPU instruction?
(A) ADD
(B) L1 Cache
(C) ROM
(D) Hard Drive

37. : What does the ‘bus’ in computer architecture refer to?
(A) The pathway used for data transfer between CPU and other components
(B) A storage device
(C) A cooling system
(D) A power supply unit

38. : Which CPU component is responsible for fetching instructions from memory?
(A) Control Unit (CU)
(B) Arithmetic Logic Unit (ALU)
(C) Register
(D) Cache

39. : What does the term ‘pipeline’ refer to in CPU architecture?
(A) The technique of processing multiple instructions simultaneously
(B) The size of the CPU cache
(C) The number of CPU cores
(D) The CPU’s clock speed

40. : Which CPU feature improves processing speed by allowing multiple instructions to be processed at different stages simultaneously?
(A) Pipelining
(B) Hyper-threading
(C) Multi-core processing
(D) Overclocking

41. : Which type of CPU cache is typically the largest and located furthest from the CPU core?
(A) L1 Cache
(B) L2 Cache
(C) L3 Cache
(D) L4 Cache

42. : What is the primary role of the CPU’s bus interface unit?
(A) To manage memory access
(B) To facilitate communication between the CPU and other hardware components
(C) To perform arithmetic operations
(D) To control external devices

43. : What does the ‘instruction cycle’ in a CPU refer to?
(A) The process of fetching, decoding, and executing an instruction
(B) The speed of the CPU’s clock
(C) The number of cores in the CPU
(D) The size of the CPU cache

44. : Which CPU unit is responsible for managing the sequence of operations and controlling other components?
(A) Arithmetic Logic Unit (ALU)
(B) Control Unit (CU)
(C) Cache
(D) Register

45. : What is the purpose of the CPU’s arithmetic logic unit (ALU)?
(A) To execute data processing instructions
(B) To fetch instructions from memory
(C) To manage the flow of data between components
(D) To perform arithmetic and logical operations

46. : Which unit in the CPU manages the execution of instructions?
(A) Control Unit (CU)
(B) Arithmetic Logic Unit (ALU)
(C) Cache
(D) Register

47. : Which component of the CPU helps to execute multiple instructions simultaneously by splitting them into smaller tasks?
(A) Pipelining
(B) Multi-core processing
(C) Hyper-threading
(D) Overclocking

48. : What does the ‘fetch-decode-execute’ cycle in the CPU refer to?
(A) The process of transferring data to the hard drive
(B) The process of fetching an instruction, decoding it, and executing it
(C) The process of cooling the CPU
(D) The process of managing external devices

49. : What is the role of the CPU’s program counter?
(A) To store the address of the next instruction to be executed
(B) To perform arithmetic operations
(C) To manage memory access
(D) To connect external devices

50. : Which feature of the CPU allows it to handle more tasks simultaneously by managing multiple threads?
(A) Multi-core processing
(B) Hyper-threading
(C) Pipelining
(D) Overclocking

Central Processing Unit (CPU) MCQs
By: Prof. Dr. Fazal Rehman | Last updated: June 19, 2025

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