Computer MCQs (50 Questions)

Computer MCQs (50 Questions)

1. Who is known as the father of computers?

a) Alan Turing

b) Charles Babbage

c) Bill Gates

d) Steve Jobs

✔ Answer: b) Charles Babbage

2. Which device is used to input text into a computer?

a) Monitor

b) Printer

c) Keyboard

d) Speaker

✔ Answer: c) Keyboard

3. CPU stands for—

a) Central Processing Unit

b) Control Program Unit

c) Central Program Utility

d) Computer Processing Unit

✔ Answer: a) Central Processing Unit

4. Which part of the computer performs calculations?

a) ALU

b) CU

c) RAM

d) ROM

✔ Answer: a) ALU

5. Which memory is volatile?

a) ROM

b) Hard Disk

c) RAM

d) Pen Drive

✔ Answer: c) RAM

6. Which memory is permanent?

a) RAM

b) Cache

c) ROM

d) Register

✔ Answer: c) ROM

7. 1 Kilobyte (KB) =

a) 1000 bytes

b) 1024 bytes

c) 512 bytes

d) 2048 bytes

✔ Answer: b) 1024 bytes

8. Which of the following is an operating system?

a) MS Word

b) Windows

c) Google

d) Excel

✔ Answer: b) Windows

9. Which is not an operating system?

a) Linux

b) Unix

c) DOS

d) Oracle

✔ Answer: d) Oracle

10. Which device is used to display output?

a) Mouse

b) Keyboard

c) Monitor

d) Scanner

✔ Answer: c) Monitor

11. Brain of the computer is—

a) Monitor

b) CPU

c) RAM

d) Hard Disk

✔ Answer: b) CPU

12. Which is an example of input device?

a) Printer

b) Plotter

c) Scanner

d) Speaker

✔ Answer: c) Scanner

13. Which software is used for word processing?

a) MS Excel

b) MS Word

c) MS PowerPoint

d) Paint

✔ Answer: b) MS Word

14. Which unit controls all activities of the computer?

a) ALU

b) RAM

c) CU

d) ROM

✔ Answer: c) CU

15. Which of the following is secondary storage?

a) RAM

b) ROM

c) Cache

d) Hard Disk

✔ Answer: d) Hard Disk

16. Which key is used to delete text to the left of cursor?

a) Delete

b) Backspace

c) Enter

d) Shift

✔ Answer: b) Backspace

17. What is the full form of USB?

a) Universal Serial Bus

b) United Service Bus

c) Universal Service Backup

d) Uniform Serial Board

✔ Answer: a) Universal Serial Bus

18. Which is an example of system software?

a) MS Word

b) MS Excel

c) Windows

d) Photoshop

✔ Answer: c) Windows

19. Which language is understood by computer directly?

a) High-level language

b) Assembly language

c) Machine language

d) BASIC

✔ Answer: c) Machine language

20. Binary number system uses—

a) 8 digits

b) 10 digits

c) 2 digits

d) 16 digits

✔ Answer: c) 2 digits

21. Which of the following is NOT hardware?

a) Mouse

b) Keyboard

c) Monitor

d) Windows

✔ Answer: d) Windows

22. Which memory is fastest?

a) RAM

b) Cache

c) Hard Disk

d) ROM

✔ Answer: b) Cache

23. What is the full form of WWW?

a) World Web Wide

b) Wide World Web

c) World Wide Web

d) Web World Wide

✔ Answer: c) World Wide Web

24. Which device is used to copy text and images?

a) Printer

b) Scanner

c) Monitor

d) Speaker

✔ Answer: b) Scanner

25. Which key combination is used to copy?

a) Ctrl + V

b) Ctrl + X

c) Ctrl + C

d) Ctrl + Z

✔ Answer: c) Ctrl + C

26. Which key is used to paste?

a) Ctrl + C

b) Ctrl + X

c) Ctrl + V

d) Ctrl + Z

✔ Answer: c) Ctrl + V

27. Which is an output device?

a) Mouse

b) Keyboard

c) Printer

d) Scanner

✔ Answer: c) Printer

28. Which file extension is used for MS Word?

a) .xls

b) .ppt

c) .doc

d) .pdf

✔ Answer: c) .doc

29. Which unit is used to measure CPU speed?

a) Byte

b) Hertz

c) Pixel

d) Watt

✔ Answer: b) Hertz

30. Which is not a programming language?

a) C

b) Java

c) Python

d) Windows

✔ Answer: d) Windows

31. What does PDF stand for?

a) Personal Data File

b) Portable Document Format

c) Printed Document File

d) Public Data Form

✔ Answer: b) Portable Document Format

32. Which device is used for video calls?

a) Webcam

b) Scanner

c) Plotter

d) Printer

✔ Answer: a) Webcam

33. Which memory stores BIOS?

a) RAM

b) ROM

c) Cache

d) Hard Disk

✔ Answer: b) ROM

34. Which is an example of application software?

a) Linux

b) DOS

c) MS Excel

d) Windows

✔ Answer: c) MS Excel

35. Which key is used to refresh a webpage?

a) F2

b) F5

c) F7

d) F12

✔ Answer: b) F5

36. Which of these is an email service?

a) Chrome

b) Gmail

c) Windows

d) Yahoo Messenger

✔ Answer: b) Gmail

37. Which unit converts AC to DC?

a) SMPS

b) UPS

c) CPU

d) ALU

✔ Answer: a) SMPS

38. What is the full form of LAN?

a) Local Area Network

b) Large Area Network

c) Logical Area Network

d) Limited Area Network

✔ Answer: a) Local Area Network

39. Which is the smallest unit of data?

a) Byte

b) Bit

c) KB

d) MB

✔ Answer: b) Bit

40. Which device produces hard copy?

a) Monitor

b) Printer

c) Scanner

d) Speaker

✔ Answer: b) Printer

41. Which key is used to save a document?

a) Ctrl + P

b) Ctrl + S

c) Ctrl + A

d) Ctrl + D

✔ Answer: b) Ctrl + S

42. Which software is used to create presentations?

a) MS Word

b) MS Excel

c) MS PowerPoint

d) Paint

✔ Answer: c) MS PowerPoint

43. Which type of computer is a smartphone?

a) Supercomputer

b) Mainframe

c) Microcomputer

d) Minicomputer

✔ Answer: c) Microcomputer

44. Which device helps in drawing on computer?

a) Light Pen

b) Scanner

c) Printer

d) Monitor

✔ Answer: a) Light Pen

45. Which company developed Windows OS?

a) Apple

b) IBM

c) Microsoft

d) Google

✔ Answer: c) Microsoft

46. Which is NOT an input device?

a) Mouse

b) Keyboard

c) Monitor

d) Scanner

✔ Answer: c) Monitor

47. What is the extension of Excel file?

a) .doc

b) .ppt

c) .xls

d) .pdf

✔ Answer: c) .xls

48. Which shortcut selects all text?

a) Ctrl + S

b) Ctrl + C

c) Ctrl + A

d) Ctrl + Z

✔ Answer: c) Ctrl + A

49. Which memory is used during program execution?

a) ROM

b) Hard Disk

c) RAM

d) Pen Drive

✔ Answer: c) RAM

50. Which technology is used for wireless internet?

a) LAN

b) Wi-Fi

c) USB

d) HDMI

✔ Answer: b) Wi-Fi