Computer General Knowledge (Computer GK) is an essential section in almost every government exam, banking exam, railway exam, SSC, police, and entrance test. Questions are usually simple but tricky, and regular practice is the key to scoring well.
In this article, we have compiled 100 important Computer GK questions and answers in English, carefully selected based on previous year exam trends. These questions are highly useful for beginners as well as advanced aspirants.
Why Computer GK Is Important for Exams?
- Asked in RRB, SSC, Banking, Police, Defence, State exams
- Easy scoring section
- Mostly direct and factual questions
- Helps boost overall exam score
100 Important Computer GK Questions and Answers
Basic Computer GK Questions (1–20)
Q1. What is a computer?
Ans: A computer is an electronic device that processes data to produce information.
Q2. Who is known as the father of computer?
Ans: Charles Babbage
Q3. What does CPU stand for?
Ans: Central Processing Unit
Q4. Which part of the computer is called the brain?
Ans: CPU
Q5. What is hardware?
Ans: Physical components of a computer.
Q6. What is software?
Ans: Programs and instructions that tell the computer what to do.
Q7. What does RAM stand for?
Ans: Random Access Memory
Q8. Which memory is volatile?
Ans: RAM
Q9. What does ROM stand for?
Ans: Read Only Memory
Q10. Which memory is non-volatile?
Ans: ROM
Q11. What is an operating system?
Ans: Software that manages computer hardware and software resources.
Q12. Example of operating system?
Ans: Windows, Linux, macOS
Q13. What is input device?
Ans: A device used to enter data into a computer.
Q14. Name an input device.
Ans: Keyboard
Q15. What is output device?
Ans: A device that displays results from a computer.
Q16. Name an output device.
Ans: Monitor
Q17. What is a monitor also called?
Ans: VDU (Visual Display Unit)
Q18. What is a keyboard?
Ans: An input device used to type data.
Q19. What is a mouse?
Ans: A pointing input device.
Q20. What is booting?
Ans: The process of starting a computer.
Memory & Storage Questions (21–40)
Q21. What is primary memory?
Ans: Memory directly accessed by CPU.
Q22. What is secondary memory?
Ans: Permanent storage like hard disk.
Q23. Example of secondary storage?
Ans: Hard Disk
Q24. What is cache memory?
Ans: High-speed memory between CPU and RAM.
Q25. Which is faster: RAM or Cache?
Ans: Cache memory
Q26. What is hard disk used for?
Ans: Long-term data storage.
Q27. What is pen drive?
Ans: Portable storage device.
Q28. What is CD full form?
Ans: Compact Disc
Q29. What is DVD full form?
Ans: Digital Versatile Disc
Q30. What is SSD?
Ans: Solid State Drive
Q31. Which storage has no moving parts?
Ans: SSD
Q32. What is byte?
Ans: Group of 8 bits.
Q33. What is bit?
Ans: Smallest unit of data.
Q34. 1 KB equals how many bytes?
Ans: 1024 bytes
Q35. What is data?
Ans: Raw facts and figures.
Q36. What is information?
Ans: Processed data.
Q37. What is backup?
Ans: Copy of data for safety.
Q38. What is cloud storage?
Ans: Online data storage.
Q39. Example of cloud storage?
Ans: Google Drive
Q40. What is formatting?
Ans: Preparing storage device for use.
Software & OS Questions (41–60)
Q41. What is system software?
Ans: Software that controls system operations.
Q42. Example of system software?
Ans: Windows
Q43. What is application software?
Ans: Software for specific tasks.
Q44. Example of application software?
Ans: MS Word
Q45. What is MS Word used for?
Ans: Word processing.
Q46. What is MS Excel used for?
Ans: Calculations and spreadsheets.
Q47. What is MS PowerPoint used for?
Ans: Presentations.
Q48. What is open-source software?
Ans: Software with free source code.
Q49. Example of open-source OS?
Ans: Linux
Q50. What is GUI?
Ans: Graphical User Interface
Q51. What is CLI?
Ans: Command Line Interface
Q52. What is multitasking?
Ans: Running multiple tasks at once.
Q53. What is file?
Ans: Collection of data.
Q54. What is folder?
Ans: Collection of files.
Q55. What is extension?
Ans: File type identifier.
Q56. Example of file extension?
Ans: .docx
Q57. What is antivirus?
Ans: Software that removes viruses.
Q58. Example of antivirus?
Ans: Quick Heal
Q59. What is update?
Ans: Improving software features.
Q60. What is upgrade?
Ans: Installing newer version.
Internet & Networking Questions (61–80)
Q61. What is internet?
Ans: Global network of computers.
Q62. What is WWW?
Ans: World Wide Web
Q63. Who invented WWW?
Ans: Tim Berners-Lee
Q64. What is website?
Ans: Collection of web pages.
Q65. What is browser?
Ans: Software to access websites.
Q66. Example of browser?
Ans: Google Chrome
Q67. What is search engine?
Ans: Tool to search information.
Q68. Example of search engine?
Ans: Google
Q69. What is email?
Ans: Electronic mail.
Q70. Example of email service?
Ans: Gmail
Q71. What is URL?
Ans: Uniform Resource Locator
Q72. What is IP address?
Ans: Unique address of a device.
Q73. What is modem?
Ans: Converts digital to analog signals.
Q74. What is router?
Ans: Connects networks.
Q75. What is LAN?
Ans: Local Area Network
Q76. What is WAN?
Ans: Wide Area Network
Q77. What is Wi-Fi?
Ans: Wireless networking technology.
Q78. What is bandwidth?
Ans: Data transfer capacity.
Q79. What is download?
Ans: Receiving data.
Q80. What is upload?
Ans: Sending data.
Advanced & Security Questions (81–100)
Q81. What is virus?
Ans: Malicious computer program.
Q82. What is malware?
Ans: Harmful software.
Q83. What is firewall?
Ans: Network security system.
Q84. What is hacking?
Ans: Unauthorized access.
Q85. What is phishing?
Ans: Online fraud technique.
Q86. What is password?
Ans: Secret security key.
Q87. What is encryption?
Ans: Data protection method.
Q88. What is decryption?
Ans: Converting encrypted data.
Q89. What is two-factor authentication?
Ans: Extra security layer.
Q90. What is biometric authentication?
Ans: Fingerprint/face security.
Q91. What is AI?
Ans: Artificial Intelligence
Q92. What is machine learning?
Ans: Learning from data.
Q93. What is IoT?
Ans: Internet of Things
Q94. What is database?
Ans: Organized data collection.
Q95. What is SQL?
Ans: Structured Query Language
Q96. What is cloud computing?
Ans: Internet-based computing.
Q97. What is chatbot?
Ans: Automated conversation program.
Q98. What is operating speed measured in?
Ans: Hertz
Q99. What is supercomputer?
Ans: Extremely powerful computer.
Q100. Example of supercomputer in India?
Ans: PARAM
Also Read: Top 100 Computer GK Questions in Hindi
Conclusion
These 100 Important Computer GK Questions and Answers in English are extremely useful for RRB, SSC, Banking, Police, Defence, and all competitive exams. Regular practice of such questions can significantly improve your confidence and score.
Bookmark this page and revise it daily for best results.
Hi, I’m Rajesh Rana, a Computer Trainer and the founder of
Rana Computer Institute. I teach practical, job-oriented courses like
DCA, ADCA, Tally Prime,
Web Development, and Digital Marketing.
My goal is to explain computer concepts in a simple way so students can confidently use
these skills in real life, jobs, and online work.