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Computer Systems
MCQ Questions Collection

MCQ Questions for Computer Systems Chapter

Computer Systems MCQ Questions

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1.  Which of the following is not a separate unit of a Computer System?

a. Input Unit
b. Central Processing Unit
c. Register Unit
d. Output Unit

Correct Answer & Explanation:

2.  Which of the following is not an input unit device?

a. Trackball
b. Joystick
c. Lightpen
d. Plotter

Correct Answer & Explanation:

3. Which unit is also known as encoder in a computer system?

a.  Input Unit
b. Output Unit
c.   Central Processing Unit
d. Storage Unit

Correct Answer & Explanation:

4.  Microphone, video camera etc. can be used in computer system to?

a. Input data
b. Output data
c.  Process data
d. Store data

Correct Answer & Explanation:

5. In computer operation the tasks such as arranging, calculating, comparing etc. are known as ?

a. Inputting
b. Outputting
c.  Processing
d. Storing

Correct Answer & Explanation:

6. ALU, CU, MU are the different units of ……. system?

a. Computer System
b. Central Processing Unit
c.  WordProcessing System
d. Calculation System

Correct Answer & Explanation:

7. Processors, Co-processors, Memory chips etc. constitutes ….unit?

a. Input Unit
b. Control Unit
c.  Central Processing Unit
d. Output Unit

Correct Answer & Explanation:

8. What is the full form of ALU?

a. Arithmetic and Logical Unit
b. Arithmetic and Logic Unit
c.  Arithmetical and Logical Unit
d. Artificial Logic Unit

Correct Answer & Explanation:

9. Which unit in computer system performs mathematical manipulation and logical analysis?

a. ALU
b. CU
c.  MU
d. Registers

Correct Answer & Explanation:


10. Actual computer instructions are executed by which unit of computer system?

a. CU
b. ALU
c. RAM Chips
d. Microprocessor

Correct Answer & Explanation:

11. Which unit controls and directs the flow of information through computer system?

a. ALU
b. CU
c. Memory
d. Processor

Correct Answer & Explanation:

12. Which unit is known as nerve center of a computer system?

a. ALU
b. CU
c. Memory
d. System Bus

Correct Answer & Explanation:

13. Input Unit encodes the data. Which unit decodes to execute instructions?

a. Output Unit
b. Input Unit
c. Control Unit
d. ALU

Correct Answer & Explanation:

14. A part of CPU that handles the storage facility in computer system is ….

a. Primary Memory
b. Hard disk
c.  Both of above
d. None of above

Correct Answer & Explanation:

15. RAM & ROM are called primary memory because?

a. CPU accesses data in them directly
b. They are installed in motherboard
c.  They are the fastest storage devices
d. All of above

Correct Answer & Explanation:

16. Which unit is responsible to decode the information and present in human readable form?

a.  Input Unit
b. Output Unit
c.   Central Processing Unit
d. ALU

Correct Answer & Explanation:

17. RAM & ROM are present in Computer System. Why do you need secondary storage?

a. Save data for future use
b. To increase memory space
c.  To extend primary memory
d. All of above

Correct Answer & Explanation:

18. Which memory is also known as auxiliary memory?

a. RAM
b. ROM
c. Cache
d. Secondary Memory

Correct Answer & Explanation:

19. Bar Code Readers, Optical Mark Reader, Magnetic Ink Character Reader are the devices of which unit?

a. Input Unit
b. Output Unit
c.  Processing Unit
d. Storage Unit

Correct Answer & Explanation:

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