Top 100+ Computer MCQ for DHS Grade 3 Exam

Top 100+ Computer MCQ for DHS Grade 3 Exam

These are the most important computer GK MCQs for DHS Grade 3 Exam (Non-Technical) Recruitment, SSC, Banking, Railway, and other competitive exams. Click "View Answer" to check the correct option instantly.

Q1. Which of the following is the brain of the computer?

1. RAM
2. CPU
3. Hard Disk
4. Monitor

Answer: CPU

Q2. What does RAM stand for?

1. Read Access Memory
2. Random Access Memory
3. Run Accept Memory
4. Real Access Machine

Answer: Random Access Memory

Q3. Which of the following is a storage device?

1. Printer
2. Keyboard
3. Hard Disk
4. Mouse

Answer: Hard Disk

Q4. The full form of URL is?

1. Uniform Resource Locator
2. Universal Reference Link
3. Uniform Reference Locator
4. Universal Resource Link

Answer: Uniform Resource Locator

Q5. MS Word is an example of?

1. System Software
2. Application Software
3. Operating System
4. Utility Software

Answer: Application Software

Q6. Binary number system uses?

1. 0 and 1
2. 1 and 2
3. 2 and 3
4. 3 and 4

Answer: 0 and 1

Q7. Which of the following is not an input device?

1. Mouse
2. Scanner
3. Monitor
4. Keyboard

Answer: Monitor

Q8. The full form of HTTP is?

1. HyperText Transfer Protocol
2. Hyper Transfer Text Protocol
3. HighText Transfer Protocol
4. Hyper Transfer Tool Protocol

Answer: HyperText Transfer Protocol

Q9. The first mechanical computer designed by Charles Babbage is called?

1. Calculator
2. Difference Engine
3. Analytical Engine
4. Processor

Answer: Analytical Engine

Q10. Which one is the fastest memory?

1. Hard Disk
2. Cache Memory
3. RAM
4. ROM

Answer: Cache Memory

Q11. Which device is used to connect computers to a network?

1. Router
2. Monitor
3. Keyboard
4. Printer

Answer: Router

Q12. The full form of IP is?

1. Internet Protocol
2. Internal Program
3. Information Process
4. Input Protocol

Answer: Internet Protocol

Q13. Which key is used to refresh a webpage?

1. F2
2. F3
3. F5
4. F12

Answer: F5

Q14. Which of the following is not an operating system?

1. Windows
2. Linux
3. Oracle
4. MacOS

Answer: Oracle

Q15. Which programming language is used for web apps?

1. Python
2. JavaScript
3. C++
4. COBOL

Answer: JavaScript

Q16. The first computer virus was known as?

1. Creeper
2. ILOVEYOU
3. Brain
4. Morris

Answer: Creeper

Q17. The shortcut key to paste in Windows is?

1. Ctrl + V
2. Ctrl + C
3. Ctrl + P
4. Ctrl + X

Answer: Ctrl + V

Q18. Which company developed Windows OS?

1. Google
2. Microsoft
3. Apple
4. IBM

Answer: Microsoft

Q19. Which of the following is an output device?

1. Scanner
2. Printer
3. Mouse
4. Keyboard

Answer: Printer

Q20. The full form of VPN is?

1. Virtual Private Network
2. Visual Public Network
3. Virtual Public Node
4. Variable Private Net

Answer: Virtual Private Network

Q21. Which device is required for Internet connection?

1. Modem
2. Mouse
3. Scanner
4. Printer

Answer: Modem

Q22. Which one is volatile memory?

1. ROM
2. RAM
3. Hard Disk
4. DVD

Answer: RAM

Q23. The first computer language is?

1. Java
2. C
3. FORTRAN
4. Python

Answer: FORTRAN

Q24. Who is known as the father of computer?

1. Alan Turing
2. Charles Babbage
3. Bill Gates
4. Steve Jobs

Answer: Charles Babbage

Q25. Which key is used to delete text to the left of the cursor?

1. Delete
2. Backspace
3. Shift
4. Enter

Answer: Backspace

Q26. Which company developed Java programming language?

1. Microsoft
2. Sun Microsystems
3. IBM
4. Google

Answer: Sun Microsystems

Q27. In computer terms, what does BIOS stand for?

1. Basic Input Output System
2. Binary Integrated Operating Setup
3. Base Internal Output Software
4. Basic Internet Operating System

Answer: Basic Input Output System

Q28. Which shortcut key is used to copy text?

1. Ctrl + C
2. Ctrl + V
3. Ctrl + X
4. Ctrl + P

Answer: Ctrl + C

Q29. What does PDF stand for?

1. Public Document File
2. Portable Document Format
3. Printed Data File
4. Processed Document Form

Answer: Portable Document Format

Q30. The term ‘Gigabyte’ represents?

1. 1024 bytes
2. 1024 MB
3. 1000 KB
4. 1024 KB

Answer: 1024 MB

Q31. Which device is used for sending data from one computer to another?

1. Router
2. Keyboard
3. Scanner
4. Monitor

Answer: Router

Q32. The full form of LAN is?

1. Local Access Network
2. Local Area Network
3. Logical Area Node
4. Limited Access Network

Answer: Local Area Network

Q33. Which of the following is a search engine?

1. Facebook
2. Google
3. WhatsApp
4. Instagram

Answer: Google

Q34. Which of the following is an open-source OS?

1. Windows
2. Linux
3. MacOS
4. Solaris

Answer: Linux

Q35. The shortcut key for “Save As” in MS Word is?

1. F5
2. Ctrl + S
3. F12
4. Alt + F4

Answer: F12

Q36. A byte consists of how many bits?

1. 4
2. 8
3. 16
4. 32

Answer: 8

Q37. The main page of a website is called?

1. Dashboard
2. Homepage
3. Portal
4. Webpage

Answer: Homepage

Q38. What does HTML stand for?

1. HyperText Markup Language
2. HighText Machine Language
3. HyperText Main Link
4. Hyper Tool Markup Language

Answer: HyperText Markup Language

Q39. In Excel, a collection of worksheets is called?

1. Document
2. Workbook
3. Database
4. Table

Answer: Workbook

Q40. Which company developed the C language?

1. Microsoft
2. AT&T Bell Labs
3. Apple
4. Google

Answer: AT&T Bell Labs

Q41. The smallest unit of data in computer is?

1. Byte
2. Bit
3. Kilobyte
4. Nibble

Answer: Bit

Q42. Which one is a programming language?

1. HTTP
2. FTP
3. Python
4. SMTP

Answer: Python

Q43. Which device is used to display output?

1. Monitor
2. Keyboard
3. Mouse
4. Scanner

Answer: Monitor

Q44. The full form of DNS is?

1. Domain Name System
2. Direct Network Service
3. Digital Network System
4. Domain Node Setup

Answer: Domain Name System

Q45. Which of these is an email protocol?

1. HTTP
2. SMTP
3. FTP
4. HTML

Answer: SMTP

Q46. Which of these is not a computer language?

1. Pascal
2. COBOL
3. Linux
4. Java

Answer: Linux

Q47. The full form of GUI is?

1. Graphical User Interface
2. Global User Internet
3. Graphical Uniform Input
4. General Utility Interface

Answer: Graphical User Interface

Q48. What does IP address uniquely identify?

1. A website
2. A device in a network
3. An email account
4. A web browser

Answer: A device in a network

Q49. Which protocol is used for secure websites?

1. HTTP
2. HTTPS
3. FTP
4. SMTP

Answer: HTTPS

Q50. The full form of ASCII is?

1. American Standard Code for Information Interchange
2. Advanced Standard Code for Internet Interface
3. American System Code for Internal Interchange
4. Applied Standard Code for Information Input

Answer: American Standard Code for Information Interchange

Q51. Which shortcut key is used to rename a file in Windows?

1. F1
2. F2
3. F3
4. F5

Answer: F2

Q52. What does SQL stand for?

1. Structured Query Language
2. System Query Language
3. Sequential Query Language
4. Standard Query Level

Answer: Structured Query Language

Q53. Which key combination is used to paste in Windows?

1. Ctrl + X
2. Ctrl + C
3. Ctrl + V
4. Ctrl + Z

Answer: Ctrl + V

Q54. Which one is not an example of an Operating System?

1. Linux
2. Unix
3. Oracle
4. Windows

Answer: Oracle

Q55. Which function key is used to refresh a web page?

1. F2
2. F5
3. F6
4. F9

Answer: F5

Q56. In which year was the first computer virus created?

1. 1983
2. 1986
3. 1990
4. 1995

Answer: 1986

Q57. What is the shortcut key for 'Undo'?

1. Ctrl + C
2. Ctrl + U
3. Ctrl + X
4. Ctrl + Z

Answer: Ctrl + Z

Q58. What does GUI stand for?

1. Graphical User Interface
2. General User Interface
3. Graphical Utility Integration
4. General Utility Interface

Answer: Graphical User Interface

Q59. Which of the following is the smallest unit of data in a computer?

1. Byte
2. Bit
3. Kilobyte
4. Nibble

Answer: Bit

Q60. What is the full form of VPN?

1. Virtual Private Network
2. Visual Private Network
3. Virtual Public Network
4. Verified Private Network

Answer: Virtual Private Network

Q61. Which key is used to open Task Manager directly?

1. Ctrl + Alt + Del
2. Ctrl + Shift + Esc
3. Alt + Tab
4. Shift + Esc

Answer: Ctrl + Shift + Esc

Q62. What does BIOS stand for?

1. Basic Input Output System
2. Binary Input Output System
3. Basic Internal Output System
4. Basic Input Online System

Answer: Basic Input Output System

Q63. Which programming language is called the mother of all languages?

1. FORTRAN
2. C
3. Assembly
4. COBOL

Answer: C

Q64. Which device connects multiple computers in a LAN?

1. Hub
2. Router
3. Switch
4. Bridge

Answer: Switch

Q65. ASCII uses how many bits to represent a character?

1. 16
2. 7
3. 8
4. 10

Answer: 7

Q66. Which protocol is used to receive emails?

1. HTTP
2. SMTP
3. POP3
4. FTP

Answer: POP3

Q67. The full form of IP is?

1. Internet Program
2. Internet Protocol
3. Internal Process
4. Internal Protocol

Answer: Internet Protocol

Q68. What is the shortcut for 'Select All'?

1. Ctrl + C
2. Ctrl + S
3. Ctrl + A
4. Ctrl + E

Answer: Ctrl + A

Q69. What does DNS stand for?

1. Domain Name System
2. Digital Network Service
3. Domain Number Server
4. Direct Network System

Answer: Domain Name System

Q70. Which storage is volatile in nature?

1. ROM
2. Hard Disk
3. RAM
4. DVD

Answer: RAM

Q71. Which company developed Windows OS?

1. Apple
2. IBM
3. Microsoft
4. Google

Answer: Microsoft

Q72. What is the extension of MS Word files (latest versions)?

1. .doc
2. .txt
3. .docx
4. .pdf

Answer: .docx

Q73. Which device is required for the Internet connection?

1. Switch
2. Router
3. Hub
4. Projector

Answer: Router

Q74. Which one is the default extension of Excel files?

1. .xlsx
2. .xls
3. .csv
4. .xlt

Answer: .xlsx

Q75. What is the shortcut for 'Copy'?

1. Ctrl + C
2. Ctrl + X
3. Ctrl + V
4. Ctrl + Z

Answer: Ctrl + C

Q76. Which shortcut key is used to cut selected text?

1. Ctrl + V
2. Ctrl + C
3. Ctrl + X
4. Ctrl + Z

Answer: Ctrl + X

Q77. Which of the following is not an example of hardware?

1. Printer
2. Mouse
3. MS Excel
4. Keyboard

Answer: MS Excel

Q78. Which one is the most secure password?

1. 123456
2. abcdef
3. MyPass2025!
4. qwerty

Answer: MyPass2025!

Q79. Which of these is an open-source operating system?

1. Windows
2. Linux
3. MacOS
4. MS-DOS

Answer: Linux

Q80. What does PDF stand for?

1. Printable Document Format
2. Portable Document Format
3. Program Data File
4. Public Data Format

Answer: Portable Document Format

Q81. Which computer memory is permanent?

1. RAM
2. ROM
3. Cache
4. Register

Answer: ROM

Q82. Which of these is a web browser?

1. Google
2. Yahoo
3. Mozilla Firefox
4. Bing

Answer: Mozilla Firefox

Q83. What is the default file extension of PowerPoint presentations?

1. .docx
2. .pptx
3. .xlsx
4. .pdf

Answer: .pptx

Q84. Which of the following is an output device?

1. Mouse
2. Keyboard
3. Printer
4. Scanner

Answer: Printer

Q85. The first search engine on the Internet was?

1. Google
2. Archie
3. Yahoo
4. Bing

Answer: Archie

Q86. Which programming language is used for web apps?

1. C++
2. JavaScript
3. Python
4. COBOL

Answer: JavaScript

Q87. What is the maximum value of a byte?

1. 127
2. 255
3. 511
4. 1024

Answer: 255

Q88. What does LAN stand for?

1. Large Area Network
2. Local Area Network
3. Light Access Network
4. Logical Area Network

Answer: Local Area Network

Q89. In which decade was the first email sent?

1. 1960s
2. 1970s
3. 1980s
4. 1990s

Answer: 1970s

Q90. The term 'Pentium' is related to?

1. Intel Processor
2. Microsoft Software
3. Apple Mac
4. Linux Kernel

Answer: Intel Processor

Q91. Which of the following is a spreadsheet program?

1. MS Word
2. MS Excel
3. MS PowerPoint
4. Adobe Reader

Answer: MS Excel

Q92. What is the full form of ICT?

1. Information and Communication Technology
2. International Communication Technology
3. Integrated Computer Technology
4. Information Control Technology

Answer: Information and Communication Technology

Q93. Which part of the computer is used for calculations and logic operations?

1. RAM
2. ALU
3. CU
4. ROM

Answer: ALU

Q94. What does SMTP stand for?

1. Simple Mail Transfer Protocol
2. Secure Mail Transfer Protocol
3. Standard Mail Transfer Protocol
4. Systematic Mail Transfer Protocol

Answer: Simple Mail Transfer Protocol

Q95. Which type of software is MS Windows?

1. Application Software
2. Utility Software
3. Operating System
4. Programming Software

Answer: Operating System

Q96. Which company created the iPhone?

1. Microsoft
2. Google
3. Apple
4. Samsung

Answer: Apple

Q97. What is the full form of HTML?

1. Hyperlinks and Text Markup Language
2. HyperText Markup Language
3. HighText Machine Language
4. Hyper Tool Multi Language

Answer: HyperText Markup Language

Q98. Which device is used for backup?

1. Printer
2. Projector
3. External Hard Drive
4. Monitor

Answer: External Hard Drive

Q99. What is the full form of CAD?

1. Computer Aided Design
2. Computer Advanced Drawing
3. Central Application Design
4. Computer Algorithmic Design

Answer: Computer Aided Design

Q100. Which computer is used for weather forecasting?

1. Mini Computer
2. Super Computer
3. Mainframe Computer
4. Micro Computer

Answer: Super Computer