🧠 Computer Fundamentals – 30 MCQs with Answers


1. Computer is an example of —

A) Mechanical Device
B) Electronic Device
C) Electrical Device
D) None of these
✅ Answer: B) Electronic Device


2. Which of the following is the brain of a computer?

A) Monitor
B) Keyboard
C) CPU
D) Mouse
✅ Answer: C) CPU


3. Full form of CPU is —

A) Central Process Unit
B) Central Processing Unit
C) Central Peripheral Unit
D) Control Processing Unit
✅ Answer: B) Central Processing Unit


4. Which part of the computer is used for permanent storage?

A) RAM
B) ROM
C) Hard Disk
D) Cache
✅ Answer: C) Hard Disk


5. Input device among the following is —

A) Monitor
B) Printer
C) Mouse
D) Speaker
✅ Answer: C) Mouse


6. Which of the following is a system software?

A) MS Word
B) Windows
C) Tally
D) Photoshop
✅ Answer: B) Windows


7. ALU stands for —

A) Arithmetic Logic Unit
B) Advanced Logical Unit
C) Array Logic Unit
D) Automatic Logic Unit
✅ Answer: A) Arithmetic Logic Unit


8. Output devices include —

A) Mouse, Keyboard
B) Monitor, Printer
C) RAM, ROM
D) CPU, UPS
✅ Answer: B) Monitor, Printer


9. What is the full form of BIOS?

A) Basic Internal Output System
B) Basic Input Output System
C) Binary Input Output Source
D) Basic Integrated Operating System
✅ Answer: B) Basic Input Output System


10. Which memory is volatile in nature?

A) ROM
B) RAM
C) Hard Disk
D) CD-ROM
✅ Answer: B) RAM


11. The smallest unit of data in a computer is —

A) Byte
B) Bit
C) Nibble
D) Word
✅ Answer: B) Bit


12. Which device connects computers in a network?

A) Modem
B) Scanner
C) Router
D) Printer
✅ Answer: C) Router


13. Operating System acts as —

A) User Interface
B) Application Program
C) Hardware Component
D) Database
✅ Answer: A) User Interface


14. Which key is used to refresh a page?

A) F1
B) F5
C) F7
D) F12
✅ Answer: B) F5


15. The extension of a Word file is —

A) .xls
B) .ppt
C) .docx
D) .txt
✅ Answer: C) .docx


16. Which of the following is an example of open-source OS?

A) Windows
B) macOS
C) Linux
D) DOS
✅ Answer: C) Linux


17. What does URL stand for?

A) Uniform Resource Locator
B) Universal Resource Locator
C) Uniform Registered Link
D) Universal Reference Link
✅ Answer: A) Uniform Resource Locator


18. Which protocol is used for browsing the internet?

A) HTTP
B) FTP
C) SMTP
D) IP
✅ Answer: A) HTTP


19. The device used to convert digital signals into analog signals is —

A) Router
B) Modem
C) Hub
D) Switch
✅ Answer: B) Modem


20. Which is not an example of secondary storage?

A) Pen Drive
B) Hard Disk
C) CD-ROM
D) RAM
✅ Answer: D) RAM


21. The first mechanical computer was invented by —

A) Charles Babbage
B) Blaise Pascal
C) Alan Turing
D) Bill Gates
✅ Answer: A) Charles Babbage


22. Which language is directly understood by the computer?

A) Assembly Language
B) Machine Language
C) High-Level Language
D) Binary Language
✅ Answer: B) Machine Language


23. GUI stands for —

A) Graphical User Interface
B) General User Interface
C) Graphical Utility Interface
D) General Utility Interface
✅ Answer: A) Graphical User Interface


24. Shortcut key to copy text in Windows is —

A) Ctrl + C
B) Ctrl + X
C) Ctrl + V
D) Ctrl + P
✅ Answer: A) Ctrl + C


25. Which one is an example of an optical storage device?

A) Hard Disk
B) Blu-Ray Disc
C) Pen Drive
D) Floppy Disk
✅ Answer: B) Blu-Ray Disc


26. Which unit performs logical operations in CPU?

A) CU
B) ALU
C) MU
D) DU
✅ Answer: B) ALU


27. The Internet was first developed by —

A) NASA
B) ARPANET
C) Microsoft
D) Google
✅ Answer: B) ARPANET


28. Which of the following is not an operating system?

A) Linux
B) Windows
C) MS Excel
D) macOS
✅ Answer: C) MS Excel


29. What is the full form of PDF?

A) Portable Data File
B) Portable Document Format
C) Personal Document Format
D) Program Data File
✅ Answer: B) Portable Document Format


30. Which of the following is used to protect a computer from viruses?

A) Compiler
B) Firewall
C) Antivirus
D) Operating System
✅ Answer: C) Antivirus