Computer Basics GK: 100 Questions with Answers

Section 1: Computer Fundamentals (1-25)

1. What does CPU stand for? Answer: Central Processing Unit

2. Which is called the brain of the computer? Answer: CPU

3. What is the full form of RAM? Answer: Random Access Memory

4. What is the full form of ROM? Answer: Read Only Memory

5. Which memory is volatile? Answer: RAM

6. Which memory is non-volatile? Answer: ROM

7. What is the smallest unit of data in a computer? Answer: Bit

8. How many bits make one byte? Answer: 8

9. 1024 bytes is equal to? Answer: 1 KB (Kilobyte)

10. What is the full form of ALU? Answer: Arithmetic Logic Unit

11. Which unit performs arithmetic and logical operations? Answer: ALU

12. What is the function of Control Unit? Answer: It controls and coordinates all operations of the computer.

13. What does OS stand for? Answer: Operating System

14. Which is the most popular operating system? Answer: Windows (by Microsoft)

15. What is the full form of GUI? Answer: Graphical User Interface

16. MS-DOS is a type of? Answer: Command Line Interface (CLI) Operating System

17. What is a computer virus? Answer: A malicious program that can replicate itself and spread.

18. What is the full form of PDF? Answer: Portable Document Format

19. What is hardware? Answer: Physical parts of a computer that can be touched.

20. What is software? Answer: Set of instructions that tell the computer what to do.

21. Which device is used to input text and numbers? Answer: Keyboard

22. Which device is used to point and select on screen? Answer: Mouse

23. What is the full form of LCD? Answer: Liquid Crystal Display

24. What is the full form of LED? Answer: Light Emitting Diode

25. What is the main circuit board of a computer called? Answer: Motherboard

Section 2: Memory & Storage (26-40)

26. Which memory is used to store data permanently? Answer: Secondary Memory (Hard Disk, SSD, etc.)

27. What is the full form of HDD? Answer: Hard Disk Drive

28. What is SSD? Answer: Solid State Drive (faster than HDD)

29. What is cache memory? Answer: Very fast memory located inside or near the CPU.

30. 1 GB is equal to? Answer: 1024 MB

31. What is the full form of USB? Answer: Universal Serial Bus

32. Which device is used for temporary storage? Answer: RAM

33. What is the capacity of a standard CD? Answer: 700 MB

34. What is the capacity of a standard DVD? Answer: 4.7 GB (single layer)

35. What does BIOS stand for? Answer: Basic Input Output System

36. Where is BIOS stored? Answer: In ROM/Flash memory on motherboard

37. What is the function of RAM? Answer: To hold data and instructions temporarily while the computer is running.

38. Which storage device has no moving parts? Answer: SSD

39. What is cloud storage? Answer: Storage of data on remote servers accessed via internet.

40. What is the full form of URL? Answer: Uniform Resource Locator

Section 3: Input & Output Devices (41-55)

41. Printer is which type of device? Answer: Output Device

42. Scanner is which type of device? Answer: Input Device

43. What is the full form of MICR? Answer: Magnetic Ink Character Recognition

44. What is OCR? Answer: Optical Character Recognition

45. What is the use of Joystick? Answer: Gaming and controlling cursor

46. Which device converts digital signals to analog? Answer: Modem (Modulator)

47. Which device converts analog to digital? Answer: Modem (Demodulator)

48. What is the full form of VDU? Answer: Visual Display Unit

49. What is the use of Webcam? Answer: Video input / Video calling

50. What is a Plotter used for? Answer: Printing large drawings and graphics

51. Which device is used to take photos in a computer? Answer: Digital Camera / Webcam

52. What is a Light Pen used for? Answer: Direct input on screen

53. What is the full form of CRT? Answer: Cathode Ray Tube

54. Which is the most commonly used output device? Answer: Monitor

55. Which device produces hard copy output? Answer: Printer

Section 4: Internet & Networking (56-75)

56. What is the full form of WWW? Answer: World Wide Web

57. What is the full form of HTTP? Answer: HyperText Transfer Protocol

58. What is the full form of HTTPS? Answer: HyperText Transfer Protocol Secure

59. What is the full form of IP? Answer: Internet Protocol

60. What is LAN? Answer: Local Area Network

61. What is WAN? Answer: Wide Area Network

62. What is the full form of Wi-Fi? Answer: Wireless Fidelity

63. What is the full form of ISP? Answer: Internet Service Provider

64. What is a Search Engine? Answer: A program that searches the internet (Google, Bing, etc.)

65. What is an Email? Answer: Electronic Mail

66. What does @ symbol represent in email? Answer: “at”

67. What is a Computer Network? Answer: A group of computers connected together to share resources.

68. What is a Server? Answer: A powerful computer that provides services to other computers.

69. What is a Router? Answer: A device that forwards data packets between networks.

70. What is Malware? Answer: Malicious software (virus, worm, trojan, etc.)

71. What is Firewall? Answer: Security system that monitors and controls network traffic.

72. What is Phishing? Answer: Fraudulent attempt to obtain sensitive information.

73. What is the full form of HTML? Answer: HyperText Markup Language

74. What is the full form of CSS? Answer: Cascading Style Sheets

75. What is a Web Browser? Answer: Software used to access websites (Chrome, Firefox, Edge)

Section 5: Software, Programming & Others (76-100)

76. What is an Application Software? Answer: Software designed for specific tasks (MS Word, Excel, etc.)

77. What is System Software? Answer: Software that manages hardware (OS, drivers, etc.)

78. What is the full form of DBMS? Answer: Database Management System

79. What does SQL stand for? Answer: Structured Query Language

80. What is a Compiler? Answer: A program that converts high-level language to machine language.

81. What is an Interpreter? Answer: Translates and executes code line by line.

82. What is the full form of BASIC? Answer: Beginner’s All-purpose Symbolic Instruction Code

83. Who is known as the father of computers? Answer: Charles Babbage

84. Who invented the World Wide Web? Answer: Tim Berners-Lee

85. What is the first computer? Answer: ENIAC

86. What generation of computer used vacuum tubes? Answer: First Generation

87. What generation of computer used transistors? Answer: Second Generation

88. What is Artificial Intelligence (AI)? Answer: Ability of a computer to mimic human intelligence.

89. What is Machine Learning? Answer: A subset of AI where computers learn from data.

90. What is the full form of FTP? Answer: File Transfer Protocol

91. What is Microsoft Word used for? Answer: Word processing (creating documents)

92. What is Microsoft Excel used for? Answer: Spreadsheet and data analysis

93. What is PowerPoint used for? Answer: Creating presentations

94. What is the extension of a Word document? Answer: .docx

95. What is the extension of an Excel file? Answer: .xlsx

96. What does “Debugging” mean? Answer: Finding and removing errors from a program.

97. What is a Bytecode? Answer: Intermediate code executed by a virtual machine.

98. What is Open Source Software? Answer: Software whose source code is available for anyone to use/modify.

99. What is the full form of MAC? Answer: Media Access Control (address)

100. What is the main advantage of a computer? Answer: Speed, accuracy, storage, and automation of