Basic Computer MCQs (01-100)
Q1. Which device is known as the brain of the computer?
A) Keyboard
B) CPU
C) Monitor
D) Mouse
Answer: B
Q2. Which memory is volatile?
A) ROM
B) Hard Disk
C) RAM
D) CD-ROM
Answer: C
Q3. Which generation of computers used vacuum tubes?
A) First
B) Second
C) Third
D) Fourth
Answer: A
Q4. Which is an input device?
A) Monitor
B) Printer
C) Scanner
D) Speaker
Answer: C
Q5. ROM stands for?
A) Random Only Memory
B) Read Only Memory
C) Run On Memory
D) Rapid Output Memory
Answer: B
Q6. Microprocessors were introduced in which generation?
A) Second
B) Third
C) Fourth
D) Fifth
Answer: C
Q7. The smallest unit of data is?
A) Byte
B) Bit
C) Nibble
D) Word
Answer: B
Q8. Which output device produces hard copy?
A) Monitor
B) Printer
C) Speaker
D) Projector
Answer: B
Q9. 1 KB equals how many bytes?
A) 1000
B) 1024
C) 512
D) 2048
Answer: B
Q10. ALU in CPU performs?
A) Control operations
B) Arithmetic and Logical operations
C) Data storage
D) Input operations
Answer: B
Q11. The first mechanical computer was invented by?
A) Blaise Pascal
B) Charles Babbage
C) Alan Turing
D) John von Neumann
Answer: A
Q12. Which device is used to convert digital signals to analog signals?
A) Modem
B) Router
C) Switch
D) Hub
Answer: A
Q13. Which of the following is a storage device?
A) Keyboard
B) Mouse
C) Hard Disk
D) Monitor
Answer: C
Q14. The control unit of a CPU is responsible for?
A) Arithmetic operations
B) Controlling data flow
C) Storing data permanently
D) Managing power supply
Answer: B
Q15. Touch screen is which type of device?
A) Input
B) Output
C) Both input and output
D) Storage
Answer: C
Q16. The term “bit” stands for?
A) Binary Input Type
B) Binary Digit
C) Basic Input Transmission
D) Byte Information Transfer
Answer: B
Q17. Which generation of computers used transistors?
A) First
B) Second
C) Third
D) Fourth
Answer: B
Q18. Cache memory is?
A) Volatile and fast
B) Non-volatile and slow
C) External storage
D) Input device
Answer: A
Q19. Which device is used to read barcodes?
A) OCR
B) MICR
C) Barcode Reader
D) OMR
Answer: C
Q20. The first computer virus was named?
A) Creeper
B) ILoveYou
C) Melissa
D) Brain
Answer: A
Q21. Which is the first step in program execution?
A) Fetch
B) Decode
C) Execute
D) Store
Answer: A
Q22. The binary number system uses base?
A) 2
B) 8
C) 10
D) 16
Answer: A
Q23. Which of these is a non-volatile memory?
A) RAM
B) Cache
C) ROM
D) Register
Answer: C
Q24. Which of these is both input and output device?
A) Monitor
B) Touch Screen
C) Keyboard
D) Printer
Answer: B
Q25. Which of these is a high-level programming language?
A) Machine code
B) Assembly
C) C++
D) Binary
Answer: C
Q26. Which generation of computers is associated with AI?
A) Third
B) Fourth
C) Fifth
D) Sixth
Answer: C
Q27. A microprocessor is found in?
A) Mainframe
B) Laptop
C) Supercomputer
D) Server
Answer: B
Q28. 1 Megabyte equals?
A) 1000 KB
B) 1024 KB
C) 2048 KB
D) 512 KB
Answer: B
Q29. USB is a type of?
A) Input device
B) Output device
C) Storage device interface
D) CPU
Answer: C
Q30. Operating System is a type of?
A) System software
B) Application software
C) Utility software
D) Malware
Answer: A
Q31. The mother of all computers is called?
A) Mainframe
B) Motherboard
C) CPU
D) ALU
Answer: B
Q32. 4 bits make?
A) Bit
B) Byte
C) Nibble
D) Word
Answer: C
Q33. The printer is which type of device?
A) Input
B) Output
C) Both
D) Storage
Answer: B
Q34. Which of these is a secondary storage?
A) RAM
B) Hard Disk
C) Cache
D) Register
Answer: B
Q35. ENIAC belongs to which generation?
A) First
B) Second
C) Third
D) Fourth
Answer: A
Q36. The speed of a computer is measured in?
A) Hertz
B) Byte
C) Bit
D) Nibble
Answer: A
Q37. Which device translates typed text into machine-readable form?
A) Keyboard
B) OCR
C) Scanner
D) MICR
Answer: B
Q38. Microcomputer is also called?
A) Mainframe
B) Personal Computer
C) Supercomputer
D) Workstation
Answer: B
Q39. Which memory is fastest in the system?
A) RAM
B) Cache
C) ROM
D) Hard Disk
Answer: B
Q40. Which logic gate outputs 1 when all inputs are 1?
A) AND
B) OR
C) NOT
D) XOR
Answer: A
Q41. Which of these stores permanent instructions?
A) RAM
B) ROM
C) Cache
D) Register
Answer: B
Q42. A joystick is used as?
A) Input device
B) Output device
C) Both
D) Storage
Answer: A
Q43. CD-ROM is an example of?
A) Primary memory
B) Secondary memory
C) Cache
D) Register
Answer: B
Q44. BIOS is stored in?
A) RAM
B) ROM
C) Cache
D) Hard Disk
Answer: B
Q45. Which of these is a network device?
A) Router
B) Monitor
C) Keyboard
D) Printer
Answer: A
Q46. Which device helps visually impaired users?
A) Braille Display
B) Monitor
C) Printer
D) Joystick
Answer: A
Q47. Which gate outputs the complement of input?
A) AND
B) OR
C) NOT
D) XOR
Answer: C
Q48. Which memory is called temporary storage?
A) ROM
B) RAM
C) Hard Disk
D) Optical Disk
Answer: B
Q49. Touch screen technology combines?
A) Input only
B) Output only
C) Input and Output
D) Storage
Answer: C
Q50. CPU consists of?
A) ALU and CU
B) RAM and ROM
C) Keyboard and Monitor
D) Printer and Scanner
Answer: A
Q51. Which of the following is volatile memory?
A) RAM
B) ROM
C) Hard Disk
D) CD-ROM
Answer: A
Q52. Which generation of computers used integrated circuits?
A) First
B) Second
C) Third
D) Fourth
Answer: C
Q53. Monitor is which type of device?
A) Input
B) Output
C) Both
D) Storage
Answer: B
Q54. Secondary memory is also called?
A) Primary Storage
B) External Storage
C) Cache
D) Registers
Answer: B
Q55. Which input device reads printed text?
A) MICR
B) OCR
C) Keyboard
D) Mouse
Answer: B
Q56. Which computer is used for weather forecasting?
A) Personal Computer
B) Supercomputer
C) Mainframe
D) Minicomputer
Answer: B
Q57. CPU stands for?
A) Central Processing Unit
B) Central Peripheral Unit
C) Control Processing Unit
D) Computer Processing Unit
Answer: A
Q58. The main memory is directly accessible by?
A) ALU
B) CPU
C) Keyboard
D) Monitor
Answer: B
Q59. The first microprocessor was introduced in which generation?
A) First
B) Second
C) Third
D) Fourth
Answer: D
Q60. Which of these is a permanent memory?
A) RAM
B) ROM
C) Cache
D) Register
Answer: B
Q61. Touch screen is primarily used as?
A) Input device
B) Output device
C) Both input and output
D) Storage device
Answer: C
Q62. BIOS stands for?
A) Basic Input Output System
B) Binary Input Output System
C) Basic Internal Operation Setup
D) Binary Internal Output System
Answer: A
Q63. 1 Byte equals how many bits?
A) 4
B) 8
C) 16
D) 32
Answer: B
Q64. Which of the following is a pointing device?
A) Keyboard
B) Mouse
C) Printer
D) Monitor
Answer: B
Q65. Which logic gate outputs 1 only if both inputs are 1?
A) OR
B) AND
C) NOT
D) XOR
Answer: B
Q66. Which is an example of secondary memory?
A) Cache
B) RAM
C) Hard Disk
D) Register
Answer: C
Q67. Optical Character Recognition is abbreviated as?
A) OCR
B) MICR
C) OMR
D) ISR
Answer: A
Q68. Which of the following is a type of system software?
A) Operating System
B) MS Word
C) Browser
D) Spreadsheet
Answer: A
Q69. ENIAC belongs to which generation?
A) First
B) Second
C) Third
D) Fourth
Answer: A
Q70. 1 Kilobyte equals how many bytes?
A) 1000
B) 1024
C) 500
D) 2048
Answer: B
Q71. Which device produces hard copy output?
A) Monitor
B) Printer
C) Speaker
D) Plotter
Answer: B
Q72. Which is considered fast memory?
A) Cache
B) Hard Disk
C) CD-ROM
D) DVD
Answer: A
Q73. Which computer generation is associated with AI?
A) Third
B) Fourth
C) Fifth
D) Sixth
Answer: C
Q74. ALU stands for?
A) Arithmetic and Logical Unit
B) Arithmetic and Language Unit
C) Automatic Logical Unit
D) Arithmetic Link Unit
Answer: A
Q75. Which of the following is a magnetic storage device?
A) CD-ROM
B) Hard Disk
C) Flash Drive
D) DVD
Answer: B
Q76. CPU consists of?
A) ALU and CU
B) RAM and ROM
C) Input and Output devices
D) Keyboard and Monitor
Answer: A
Q77. 1 Megabyte equals?
A) 1000 KB
B) 1024 KB
C) 512 KB
D) 2048 KB
Answer: B
Q78. Which device reads data from cheques in banks?
A) OCR
B) MICR
C) Scanner
D) Barcode Reader
Answer: B
Q79. The fastest memory in a computer system is?
A) Hard Disk
B) Cache
C) RAM
D) ROM
Answer: B
Q80. Which of the following is not an input device?
A) Keyboard
B) Mouse
C) Printer
D) Scanner
Answer: C
Q81. Which memory is used in USB Pen Drives?
A) SRAM
B) DRAM
C) Flash Memory
D) ROM
Answer: C
Q82. Which of these is a portable computer?
A) Mainframe
B) Laptop
C) Supercomputer
D) Minicomputer
Answer: B
Q83. Binary number system uses base?
A) 2
B) 8
C) 10
D) 16
Answer: A
Q84. 4 bits form?
A) Bit
B) Byte
C) Nibble
D) Word
Answer: C
Q85. Microcomputer is also called?
A) Personal Computer
B) Mainframe
C) Supercomputer
D) Workstation
Answer: A
Q86. The main function of Control Unit is?
A) Execute arithmetic operations
B) Manage and control operations
C) Store data
D) Input/Output control only
Answer: B
Q87. Which is the smallest unit of data storage?
A) Bit
B) Byte
C) Nibble
D) Word
Answer: A
Q88. A computer mouse is used as?
A) Input device
B) Output device
C) Storage device
D) Network device
Answer: A
Q89. Which of the following is a primary storage?
A) RAM
B) Hard Disk
C) Optical Disk
D) Magnetic Tape
Answer: A
Q90. The main board of a computer is called?
A) CPU
B) Motherboard
C) ALU
D) Control Unit
Answer: B
Q91. A joystick is used for?
A) Input
B) Output
C) Storage
D) Processing
Answer: A
Q92. Which device converts analog signals to digital signals?
A) Modem
B) Router
C) Hub
D) Switch
Answer: A
Q93. First generation computers used which technology?
A) Vacuum Tubes
B) Transistors
C) ICs
D) Microprocessors
Answer: A
Q94. Second generation computers used?
A) Vacuum Tubes
B) Transistors
C) Microprocessors
D) VLSI
Answer: B
Q95. Which of the following is non-volatile memory?
A) RAM
B) ROM
C) Cache
D) Registers
Answer: B
Q96. Touch screen is which type of device?
A) Input
B) Output
C) Both Input and Output
D) Storage
Answer: C
Q97. USB is mainly used for?
A) Input
B) Output
C) Data transfer and storage
D) Networking
Answer: C
Q98. Which logic gate outputs 0 only when all inputs are 1?
A) NAND
B) AND
C) OR
D) XOR
Answer: A
Q99. Which is the primary memory of computer?
A) RAM
B) ROM
C) Hard Disk
D) Flash Drive
Answer: A
Q100. Which of the following is not a computer generation?
A) First
B) Second
C) Tenth
D) Fifth
Answer: C