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Computer Architecture Test Online

Mustansar KhanLast Updated: October 15, 2025

Important Computer Architecture Question and Answer

Total Questions:	50
Time Allowed:	25 Minutes
Total Marks:	50
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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Computer Architecture Practice Test Online With Explanation

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1. Which of the following is not a type of computer memory?

USB

ROM

Cache

RAM

2. Which of the following controls the flow of data in a CPU?

Control Unit

ALU

RAM

Cache

3. Which of the following is called the brain of the computer?

Monitor

CPU

Hard Disk

RAM

4. Which of the following is an example of primary memory?

Flash Drive

Hard disk

DVD

ROM

5. Which of the following operations is not performed by the ALU?

Instruction decoding

Logical comparison

Addition

Subtraction

6. Which type of memory is volatile?

Hard Disk

ROM

Cache

RAM

7. Which memory is used to start a computer?

RAM

Cache

ROM

Hard Disk

8. Which architecture uses load/store instructions to access memory?

RISC

Harvard

Von Neumann

CISC

9. What is the key difference between CISC and RISC?

RISC uses complex instructions

RISC uses microcode

CISC uses few instructions

CISC supports large and complex instruction sets

10. Which of these determines the instruction execution time?

Monitor refresh rate

RAM type

Hard disk speed

Clock cycle

11. Which of the following is not a characteristic of RISC architecture?

Fixed-length instructions

Fewer addressing modes

Large instruction set

Load/store architecture

12. What is the function of the memory management unit (MMU)?

Increasing CPU speed

Power supply control

Managing input devices

Handling memory access and protection

13. Which of the following is the fastest memory?

Hard Disk

RAM

DVD

Cache

14. Which architecture uses a single memory for instructions and data?

Harvard

CISC

Von Neumann

RISC

15. Which register holds the instruction currently being executed?

Data Register

Instruction Register

Program Counter

Stack Pointer

16. What does 'fetch' mean in the instruction cycle?

Store the output

Send data to the printer

Calculate the answer

Bring the instruction from memory to CPU

17. Which of the following memory types is the smallest and fastest?

Secondary memory

Main memory

Cache memory

18. Which register is used for arithmetic and logic operations?

Stack Pointer

Program Counter

Accumulator

Instruction Register

19. Which unit performs arithmetic and logical operations?

Memory Unit

Control Unit

ALU

Input Unit

20. What is a micro-operation?

A basic operation on data stored in a register

Complex arithmetic operation

Starting the computer

Execution of a large software

21. Which register holds the address of the next instruction to be executed?

Program Counter

Accumulator

Stack Pointer

Instruction Register

22. What is a multiprocessor system?

A computer with a large monitor

A system with multiple printers

A computer with two or more processors

A system with extra RAM

23. What is pipelining in CPU design?

Memory management technique

Water-cooling for CPU

Technique for parallel instruction execution

Data compression technique

24. What is a system bus?

Bus connecting external devices

Bus only for printers

Collection of data, address, and control buses

Bus used in LAN

25. Which of the following stores data permanently?

ROM

RAM

Cache

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26. Which of the following architectures separates data and instruction memory?

Von Neumann

Harvard

CISC

RISC

27. What does the acronym 'ISA' stand for in computer architecture?

Instruction Set Architecture

Input Signal Arrangement

Internal System Architecture

Integrated Storage Architecture

28. What is meant by instruction cycle?

The sequence of steps to fetch and execute instructions

The time to install an OS

The process of converting data to signals

A loop in a program

29. Which of these terms refers to storing frequently used instructions?

CPU

RAM

Cache

ROM

30. Which part of the CPU performs comparison operations?

Cache

ALU

31. What does the term 'throughput' mean in computer architecture?

Amount of data processed in a given time

Speed of monitor refresh

Number of programs running

Power consumed by CPU

32. What is the function of the bus interface unit in CPU architecture?

Send signals to the speaker

Control mouse pointer

Display graphics

Communicate with memory and I/O devices

33. Which of the following describes CISC?

Compressed Instruction System

Complex Instruction Set Computer

Common Instruction Storage Chip

Cache Integrated Set Control

34. What does the term ‘clock speed’ of a processor indicate?

Number of instructions executed per second

Screen resolution

Memory size

Size of ROM

35. Which bus is used to carry data between components?

Control bus

System bus

Address bus

Data bus

36. Which of the following is used to increase the performance of the CPU?

CD-ROM

Slow RAM

Cache Memory

Large monitor

37. What is the main function of registers in a CPU?

Display data

Store large data

Control system functions

Temporarily store data and instructions

38. What is the main role of the input unit in computer architecture?

Perform calculations

Process data

Enter data and instructions into the computer

Store files

39. Which of the following is used to increase processing speed?

Slow CPU

Disk fragmentation

Parallel processing

Fewer registers

40. What is the function of the Control Unit in the CPU?

Perform calculations

Display results

Control data flow and coordinate CPU operations

Store data

41. Which component controls the execution of instructions?

Control Unit

ROM

Cache

ALU

42. Which of the following best describes instruction pipelining?

Repeating instructions

Increasing cache size

Instruction looping

Overlapping instruction execution

43. Which memory stores data temporarily and is erased when power is off?

DVD

ROM

RAM

SSD

44. What does RISC stand for?

Reduced Instruction Set Computer

Reliable Instruction System Control

Random Instruction Storage Chip

Read Instruction Sequentially and Continuously

45. Which of the following is used to reduce the CPU's time waiting for data?

USB Drive

Cache Memory

SSD

ROM

46. Which register is used to manage subroutine calls and returns?

Instruction Register

Accumulator

Program Counter

Stack Pointer

47. Which of the following components is used for temporary, high-speed data storage?

Cache

SSD

DVD

USB

48. What is the role of the address bus?

Connect CPU to mouse

Specify memory location to access

Carry control signals

Carry data from CPU to memory

49. Which part of the computer executes instructions?

Hard Disk

RAM

CPU

ROM

50. Which component is responsible for decoding the instruction?

ALU

Cache

RAM

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Mustansar KhanLast Updated: October 15, 2025

Computer Architecture Test Online

Important Computer Architecture Question and Answer

Computer Architecture Practice Test Online With Explanation

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