Introduction To Computer Top 100 MCQs With Answer and Explanation

1. Which of the following best defines a computer?
A) A device that stores data only
B) An electronic device that processes data into information
C) A machine for typing documents
D) A device used only for gaming

2. The term “Computer” is derived from:
A) Latin word “Computare” meaning to calculate
B) Greek word “Compute” meaning to store
C) German word “Komputer” meaning to count
D) French word “Computar” meaning to process

3. Which of the following is not a basic function of a computer?
A) Input
B) Processing
C) Cooking
D) Output

4. A computer processes:
A) Electricity
B) Raw materials
C) Data
D) Sound only

5. The brain of the computer is:
A) CPU
B) RAM
C) Keyboard
D) Hard disk
Answer: A
Explanation: The Central Processing Unit (CPU) controls all computer operations.

6. Computers are classified as:
A) Mechanical only
B) Electronic only
C) Electronic and programmable
D) Manual devices

7. Which is not an example of a computer?
A) Laptop
B) Smartphone
C) Calculator
D) Refrigerator

8. Which is a key characteristic of a computer?
A) Manual operation
B) Speed and accuracy
C) Requires no electricity
D) Cannot store data

9. Which among the following is output from a computer?
A) Mouse clicks
B) Printer output
C) Data entry
D) Power supply

10. Which device is used to convert data into a form understandable by a computer?
A) Output device
B) Input device
C) Storage device
D) Software

11. Data is:
A) Processed facts
B) Raw, unprocessed facts
C) Always numeric
D) Meaningful information

12. Information is:
A) Raw facts
B) Data that has been processed and given meaning
C) Always textual
D) Data stored in hard disk only

13. Which of the following is data?
A) 98, 45, 32
B) “Students scored above average”
C) Report card with grades and remarks
D) Weather forecast

14. Which is an example of information?
A) “25°C” without location
B) “Temperature is 25°C in Delhi”
C) 1024
D) 78, 95, 62

15. Which of the following is true?
A) Information and data mean the same
B) Data is processed into information
C) Data is more meaningful than information
D) Information cannot be stored

16. Data becomes information after:
A) Storing
B) Processing
C) Deleting
D) Printing

17. In a student result sheet, the marks obtained are:
A) Data
B) Information
C) Both
D) Neither

18. Which of the following is not a property of information?
A) Timeliness
B) Accuracy
C) Relevance
D) Randomness

19. Raw data is:
A) Already processed
B) Organized
C) Unorganized and unprocessed
D) Always stored in tables

20. The transformation of data into information is carried out by:
A) CPU
B) Monitor
C) Printer
D) Mouse

21. The first mechanical calculator was invented by:
A) Charles Babbage
B) Blaise Pascal
C) Alan Turing
D) John Napier

22. Who is known as the “Father of Computers”?
A) Alan Turing
B) Charles Babbage
C) Bill Gates
D) John von Neumann

23. The Analytical Engine was designed to:
A) Play games
B) Perform any calculation
C) Store images only
D) Send messages

24. The ENIAC computer was developed in:
A) 1946
B) 1936
C) 1956
D) 1966

25. ENIAC used which technology?
A) Transistors
B) Vacuum tubes
C) Microprocessors
D) Integrated circuits

26. The term “Computer Bug” was first used because:
A) A virus attacked the system
B) A moth was found inside a computer
C) A hacker broke into a system
D) An error was found in code

27. Which was the first commercially available computer?
A) UNIVAC I
B) ENIAC
C) Mark I
D) EDSAC

28. Who developed the concept of the stored-program computer?
A) Bill Gates
B) John von Neumann
C) Ada Lovelace
D) Steve Jobs

29. Ada Lovelace is remembered for:
A) Inventing the mouse
B) Being the first programmer
C) Building ENIAC
D) Developing Java

30. Which computer is considered the first generation?
A) IBM 1401
B) ENIAC
C) PDP-11
D) Apple I

31. In computer history, the Abacus was used for:
A) Data storage
B) Calculations
C) Image processing
D) Gaming

32. The Harvard Mark I was:
A) Fully electronic
B) Electromechanical
C) Mechanical
D) Optical

33. The transition from vacuum tubes to transistors occurred in which generation?
A) First to Second
B) Second to Third
C) Third to Fourth
D) Fourth to Fifth

34. The Jacquard Loom is important in computer history because:
A) It used punch cards
B) It was programmable
C) It influenced computing concepts
D) All of the above

35. The first microprocessor, Intel 4004, was introduced in:
A) 1969
B) 1971
C) 1973
D) 1975

36. First generation computers used:
A) Vacuum tubes
B) Transistors
C) Microprocessors
D) Integrated circuits

37. Second generation computers are known for using:
A) Microprocessors
B) Transistors
C) Magnetic tape
D) Cloud storage

38. Third generation computers introduced:
A) Integrated Circuits (ICs)
B) Vacuum tubes
C) Optical storage
D) AI chips

39. The fourth generation of computers began with the invention of:
A) Transistors
B) Microprocessors
C) Punch cards
D) Magnetic disks

40. Fifth generation computers aim for:
A) Artificial Intelligence
B) Punch card processing
C) Only gaming
D) Vacuum tube efficiency

41. Which generation is known for networking and portability?
A) First
B) Second
C) Fourth
D) Fifth

42. Which language was common in first-generation computers?
A) Assembly
B) Machine language
C) Python
D) BASIC

43. The second generation improved over the first by:
A) Increasing size
B) Decreasing speed
C) Reducing heat and power consumption
D) Removing memory

44. The IBM System/360 belonged to which generation?
A) Second
B) Third
C) Fourth
D) Fifth

45. Fifth generation computers are based on:
A) Optical fiber
B) Nanotechnology and AI
C) Punch cards
D) Magnetic tape

46. Which is not a feature of computers?
A) Speed
B) Accuracy
C) Tiring after long use
D) Automation

47. Computers can perform:
A) One task only
B) Multiple tasks
C) Tasks only with internet
D) No logical operations

48. The ability to perform repeated tasks without errors is:
A) Accuracy
B) Diligence
C) Automation
D) Versatility

49. Storing large amounts of data is a feature called:
A) Accuracy
B) Storage capability
C) Speed
D) Automation

50. The ability to perform different types of tasks is:
A) Versatility
B) Diligence
C) Speed
D) Accuracy

51. Computers process data at:
A) Human speed
B) Very high speed
C) Low speed
D) Random speed

52. Automation in computers means:
A) Manual operation
B) Self-operating after starting a program
C) No electricity required
D) Only gaming

53. Which feature helps in error-free results?
A) Versatility
B) Speed
C) Accuracy
D) Diligence

54. Computers are not intelligent because:
A) They lack decision-making ability without programming
B) They can’t process data
C) They are slow
D) They cannot store data

55. Which of these is a limitation of computers?
A) Storage capacity
B) Dependence on programming
C) Speed
D) Accuracy

56. A supercomputer is used for:
A) Word processing
B) Weather forecasting
C) Playing music
D) Accounting

57. Which is the smallest type of computer?
A) Microcomputer
B) Minicomputer
C) Mainframe
D) Supercomputer

58. Mainframe computers are mostly used by:
A) Students
B) Large organizations
C) Farmers
D) Individuals at home

59. Minicomputers are:
A) Smaller than mainframes but larger than microcomputers
B) Smaller than microcomputers
C) Another name for laptops
D) Used only for gaming

60. Which type of computer is embedded in devices like washing machines?
A) Microcontroller
B) Supercomputer
C) Mainframe
D) Minicomputer

61. Laptop computers are also called:
A) Microcomputers
B) Minicomputers
C) Mainframes
D) Hybrid computers

62. Hybrid computers combine:
A) Digital and analog computing
B) Hardware and software
C) Input and output devices
D) Internet and intranet

63. Which is an example of an analog computer?
A) Digital clock
B) Speedometer
C) Laptop
D) Tablet

64. Desktop computers are:
A) Portable
B) Non-portable microcomputers
C) Mainframes
D) Analog devices

65. Which is a handheld computer?
A) Mainframe
B) Tablet
C) Minicomputer
D) Supercomputer

66. Servers are used to:
A) Serve food
B) Store, process, and manage network data
C) Only play games
D) Print documents

67. Which type of computer is found in ATMs?
A) Microcomputer
B) Embedded computer
C) Mainframe
D) Supercomputer

68. Which is the largest in size?
A) Mainframe
B) Supercomputer
C) Minicomputer
D) Microcomputer

69. Workstations are used for:
A) Simple word processing
B) High-performance tasks like graphics and engineering
C) Gaming only
D) Storing groceries

70. Which is not a classification by size?
A) Microcomputer
B) Minicomputer
C) Personal Digital Assistant
D) Software

71. An example of a special-purpose computer is:
A) Laptop
B) Weather forecasting machine
C) Desktop PC
D) Tablet

72. Which computer is best suited for real-time applications like traffic control?
A) Supercomputer
B) Embedded computer
C) Personal computer
D) Mainframe

73. Cloud servers are an example of:
A) Virtual computers
B) Embedded computers
C) Analog computers
D) Mainframes only

74. Which type of computer processes both digital and analog signals?
A) Hybrid computer
B) Mainframe
C) Minicomputer
D) Supercomputer

75. An example of a wearable computer is:
A) Smartwatch
B) Desktop
C) Mainframe
D) Minicomputer

76. Which field uses CAD software?
A) Banking
B) Engineering and design
C) Medicine
D) Agriculture

77. In education, computers are used for:
A) Online learning
B) Digital libraries
C) Virtual classrooms
D) All of the above

78. E-commerce refers to:
A) Electronic commerce
B) Email communication
C) Electronic mail
D) None of these

79. Computers in hospitals are used for:
A) Patient records
B) Diagnosis
C) Research
D) All of the above

80. Which computer application helps in weather forecasting?
A) Supercomputing
B) Data entry
C) Gaming
D) Video editing

81. In banking, computers are used for:
A) ATM services
B) Online banking
C) Transaction processing
D) All of the above

82. Which is a scientific application of computers?
A) Gene sequencing
B) Word processing
C) Blogging
D) Social media

83. Stock market trading uses:
A) Real-time processing
B) Batch processing
C) Manual processing
D) None of these

84. In transportation, computers are used for:
A) Ticket booking
B) Traffic control
C) Navigation systems
D) All of the above

85. Which of these is a military application of computers?
A) Missile guidance
B) Payroll processing
C) Blogging
D) Ticket booking

86. Which application uses GIS software?
A) Geography and mapping
B) Banking
C) Gaming
D) Word processing

87. In entertainment, computers are used for:
A) Animation
B) Video editing
C) Music production
D) All of the above

88. Which of these is an agricultural application of computers?
A) Crop monitoring
B) Weather prediction for farming
C) Precision farming
D) All of the above

89. Which application uses simulation software?
A) Pilot training
B) Blogging
C) Email
D) Social networking

90. In manufacturing, computers are used for:
A) Automation and robotics
B) Gaming
C) Cooking
D) Social media

91. The primary unit for processing in a computer is:
A) ALU
B) Monitor
C) Printer
D) Scanner

92. The main difference between data and information is:
A) Data is meaningful, information is raw
B) Data is raw facts, information is processed data
C) Both mean the same
D) Data cannot be stored, information can

93. Which was the first high-level programming language?
A) BASIC
B) FORTRAN
C) C
D) Python

94. Which generation introduced Artificial Intelligence concepts?
A) First
B) Second
C) Fourth
D) Fifth

95. Which type of computer is designed for a specific task?
A) General-purpose
B) Special purpose
C) Hybrid
D) Microprocessor

96. Which storage device is volatile?
A) Hard disk
B) ROM
C) RAM
D) DVD

97. The unit of computer speed is measured in:
A) Hertz
B) Meters per second
C) Bytes
D) Volts

98. The first personal computer was introduced by:
A) IBM
B) Microsoft
C) Apple
D) Dell

99. Which is not an application of supercomputers?
A) Weather forecasting
B) Nuclear research
C) Playing video games
D) Space exploration

100. Which of this best describes a computer?
A) A machine that can think like humans
B) An electronic programmable device that processes data
C) A device that only stores images
D) A mechanical calculator