Computer General Knowledge in English – 100 Important MCQs
Computers have become an essential part of modern life, transforming the way we work, learn, communicate, and access information. Understanding the basics of computers helps build digital literacy and improves confidence in using technology in everyday situations.
This collection of Computer General Knowledge in English covers fundamental topics such as computer basics, hardware, software, memory, input and output devices, storage devices, operating systems, networking, and internet concepts. Each question is accompanied by a clear explanation to make learning simple and effective.
Q1. What does CPU stand for?
A. Central Processing Unit
B. Central Program Unit
C. Computer Processing Unit
D. Central Power Unit
View Answer
The CPU is the “brain” of the computer. It performs calculations, processes instructions, and controls the operation of all computer components.
Q2. Which of the following is an input device?
A. Monitor
B. Printer
C. Keyboard
D. Speaker
View Answer
A keyboard is an input device used to enter text, numbers, and commands into a computer.
Q3. Which device is known as the brain of the computer?
A. RAM
B. CPU
C. Hard Disk
D. Monitor
View Answer
The CPU executes instructions and processes data, making it the most important processing unit in a computer.
Q4. Which of the following is an output device?
A. Mouse
B. Scanner
C. Printer
D. Keyboard
View Answer
A printer is an output device that produces a hard copy of digital documents on paper.
Q5. What is the full form of RAM?
A. Read Access Memory
B. Random Access Memory
C. Run Access Memory
D. Rapid Access Memory
View Answer
RAM is the computer’s temporary memory that stores data and programs currently in use. Its contents are erased when the computer is turned off.
Q6. Which of the following is permanent memory?
A. RAM
B. Cache Memory
C. ROM
D. Register
View Answer
ROM (Read Only Memory) permanently stores essential instructions required to start the computer.
Q7. Which device is used to move the cursor on a computer screen?
A. Monitor
B. Mouse
C. Printer
D. Scanner
View Answer
A mouse is a pointing device used to control the cursor and interact with items displayed on the screen.
Q8. Which storage device generally provides the largest capacity?
A. CD
B. DVD
C. Hard Disk Drive (HDD)
D. Floppy Disk
View Answer
A hard disk drive stores large amounts of data, including the operating system, software, documents, and multimedia files.
Q9. Which software manages computer hardware and software resources?
A. MS Word
B. Operating System
C. Web Browser
D. Antivirus
View Answer
An operating system acts as an interface between the user and the computer hardware while managing system resources.
Q10. Which of the following is an operating system?
A. Microsoft Excel
B. Windows
C. Google Chrome
D. Adobe Photoshop
View Answer
Microsoft Windows is one of the most widely used operating systems for personal computers.
Q11. Which key is used to delete the character to the left of the cursor?
A. Delete
B. Backspace
C. Esc
D. Shift
View Answer
The Backspace key removes the character immediately to the left of the cursor.
Q12. Which of the following is an example of application software?
A. Windows
B. Linux
C. Microsoft Word
D. BIOS
View Answer
Microsoft Word is application software used for creating, editing, and formatting documents.
Q13. Which unit is commonly used to measure computer storage?
A. Meter
B. Byte
C. Volt
D. Hertz
View Answer
A byte is the basic unit of digital storage. Larger units include kilobyte (KB), megabyte (MB), gigabyte (GB), and terabyte (TB).
Q14. Which of the following is an optical storage device?
A. SSD
B. Hard Disk
C. DVD
D. Pen Drive
View Answer
A DVD is an optical storage medium that stores data using laser technology.
Q15. What does USB stand for?
A. Universal Serial Bus
B. Universal System Bus
C. United Serial Bus
D. Universal Storage Bus
View Answer
USB is a standard interface used for connecting peripherals such as keyboards, mice, printers, and storage devices.
Q16. Which device converts hard copy documents into digital format?
A. Printer
B. Scanner
C. Monitor
D. Speaker
View Answer
A scanner captures printed documents or images and converts them into digital files.
Q17. Which company developed the Windows operating system?
A. Apple
B. Google
C. Microsoft
D. IBM
View Answer
Microsoft developed the Windows operating system, first released in 1985.
Q18. Which memory is the fastest in a computer?
A. Hard Disk
B. Cache Memory
C. DVD
D. Pen Drive
View Answer
Cache memory is a very high-speed memory located close to the CPU that stores frequently accessed data.
Q19. Which of the following is NOT an input device?
A. Mouse
B. Keyboard
C. Scanner
D. Monitor
View Answer
A monitor is an output device that displays information generated by the computer.
Q20. Which component stores the operating system and user files permanently?
A. RAM
B. CPU
C. Hard Disk / SSD
D. Cache Memory
View Answer
Hard Disk Drives (HDDs) and Solid-State Drives (SSDs) provide permanent storage for the operating system, software, and user data even after the computer is switched off.
Q21. Which of the following is an example of system software?
A. Microsoft Word
B. Windows
C. Adobe Photoshop
D. VLC Media Player
View Answer
System software manages computer hardware and provides a platform for application software. Windows is a popular operating system.
Q22. What is the full form of ROM?
A. Random Output Memory
B. Read Only Memory
C. Read Output Memory
D. Run Only Memory
View Answer
ROM is non-volatile memory that permanently stores essential startup instructions for a computer.
Q23. Which of the following is NOT a storage device?
A. Hard Disk
B. Pen Drive
C. SSD
D. Monitor
View Answer
A monitor is an output device used to display information, whereas the others are storage devices.
Q24. Which key is used to move to the next line while typing?
A. Shift
B. Enter
C. Ctrl
D. Alt
View Answer
The Enter key is used to start a new line or execute a command.
Q25. What is the full form of SSD?
A. Solid State Drive
B. Secure Storage Disk
C. System Storage Device
D. Serial Storage Drive
View Answer
An SSD stores data using flash memory and is much faster than a traditional hard disk drive.
Q26. Which of the following is a pointing device?
A. Printer
B. Mouse
C. Speaker
D. Monitor
View Answer
A mouse is a pointing device used to move the cursor and interact with graphical user interfaces.
Q27. Which of the following is a secondary storage device?
A. RAM
B. Cache Memory
C. Hard Disk
D. Register
View Answer
Secondary storage devices permanently store data even when the computer is switched off.
Q28. Which shortcut key is commonly used to copy selected text?
A. Ctrl + V
B. Ctrl + C
C. Ctrl + X
D. Ctrl + Z
View Answer
Ctrl + C copies the selected text or file to the clipboard.
Q29. Which shortcut key is commonly used to paste copied content?
A. Ctrl + X
B. Ctrl + P
C. Ctrl + V
D. Ctrl + A
View Answer
Ctrl + V pastes the copied or cut content from the clipboard.
Q30. Which shortcut key is commonly used to undo the last action?
A. Ctrl + U
B. Ctrl + Z
C. Ctrl + Y
D. Ctrl + S
View Answer
Ctrl + Z reverses the most recent action in many software applications.
Q31. Which device is used to produce sound from a computer?
A. Keyboard
B. Speaker
C. Scanner
D. Webcam
View Answer
Speakers are output devices that convert digital audio signals into sound.
Q32. Which of the following is an example of an optical disc?
A. SSD
B. CD
C. RAM
D. Hard Disk
View Answer
A Compact Disc (CD) is an optical storage medium that uses laser technology to read and write data.
Q33. Which device captures images and videos for a computer?
A. Printer
B. Webcam
C. Speaker
D. Projector
View Answer
A webcam is an input device used for video recording, video conferencing, and live streaming.
Q34. Which of the following is used to protect a computer from malware?
A. Antivirus Software
B. Paint
C. Calculator
D. Notepad
View Answer
Antivirus software detects, prevents, and removes viruses and other malicious software from a computer.
Q35. Which company developed the Linux operating system?
A. Apple
B. Microsoft
C. Linus Torvalds
D. IBM
View Answer
Linux was created by Linus Torvalds in 1991 and is one of the world’s most popular open-source operating systems.
Q36. What is the smallest unit of data in a computer?
A. Byte
B. Kilobyte
C. Bit
D. Megabyte
View Answer
A bit (binary digit) is the smallest unit of data and can have a value of either 0 or 1.
Q37. Which device is used to connect a computer to a network?
A. Modem
B. Keyboard
C. Printer
D. Scanner
View Answer
A modem enables a computer to communicate with the internet through an Internet Service Provider (ISP).
Q38. Which of the following is a web browser?
A. Microsoft Excel
B. Google Chrome
C. Adobe Photoshop
D. VLC Media Player
View Answer
Google Chrome is a popular web browser used to access websites and web applications.
Q39. Which key is commonly used to refresh a webpage in most browsers?
A. F1
B. F2
C. F5
D. F12
View Answer
The F5 key refreshes or reloads the current webpage or window in most applications.
Q40. Which of the following is a search engine?
A. Microsoft Word
B. Google
C. Windows
D. Linux
View Answer
Google is a search engine that helps users find information, websites, images, videos, and other online resources on the internet.
Q41. What does WWW stand for?
A. World Wide Web
B. World Web Window
C. Wide World Web
D. Web World Wide
View Answer
The World Wide Web (WWW) is a system of interconnected web pages that can be accessed through the Internet using a web browser.
Q42. Which protocol is primarily used for browsing websites?
A. FTP
B. HTTP
C. SMTP
D. POP3
View Answer
HTTP (HyperText Transfer Protocol) is the standard protocol used to transfer web pages between web servers and browsers.
Q43. What does URL stand for?
A. Universal Resource Locator
B. Uniform Resource Locator
C. Universal Reference Link
D. Uniform Reference Locator
View Answer
A URL is the web address used to locate a webpage or resource on the Internet.
Q44. Which of the following is an email service provider?
A. Gmail
B. Chrome
C. Windows
D. Excel
View Answer
Gmail is a popular email service developed by Google for sending and receiving electronic mail.
Q45. Which key is commonly used to save a document?
A. Ctrl + P
B. Ctrl + S
C. Ctrl + O
D. Ctrl + N
View Answer
Ctrl + S is the standard keyboard shortcut used to save the current document or file.
Q46. Which shortcut key is used to print a document?
A. Ctrl + S
B. Ctrl + P
C. Ctrl + C
D. Ctrl + A
View Answer
Ctrl + P opens the Print dialog box in most software applications.
Q47. Which shortcut key selects all content in a document?
A. Ctrl + A
B. Ctrl + X
C. Ctrl + B
D. Ctrl + D
View Answer
Ctrl + A selects all text, files, or objects in the active window or document.
Q48. Which shortcut key is used to cut selected text?
A. Ctrl + V
B. Ctrl + C
C. Ctrl + X
D. Ctrl + Z
View Answer
Ctrl + X removes the selected content and places it on the clipboard for pasting elsewhere.
Q49. Which of the following is cloud storage?
A. Google Drive
B. Microsoft Paint
C. Notepad
D. Calculator
View Answer
Google Drive is a cloud storage service that allows users to store, access, and share files online.
Q50. What does PDF stand for?
A. Portable Document Format
B. Personal Data File
C. Printed Data Format
D. Public Document File
View Answer
PDF is a widely used file format developed by Adobe for sharing documents while preserving formatting.
Q51. Which software is commonly used to create presentations?
A. Microsoft Word
B. Microsoft Excel
C. Microsoft PowerPoint
D. Notepad
View Answer
Microsoft PowerPoint is presentation software used to create slideshows with text, images, charts, and multimedia.
Q52. Which software is mainly used for spreadsheet calculations?
A. Microsoft Excel
B. Microsoft Word
C. Paint
D. VLC Media Player
View Answer
Microsoft Excel is spreadsheet software used for calculations, charts, data analysis, and record management.
Q53. Which file extension is commonly used for Microsoft Word documents?
A. .xls
B. .ppt
C. .docx
D. .jpg
View Answer
The .docx extension is the default file format for Microsoft Word documents.
Q54. Which file extension is commonly associated with image files?
A. .mp3
B. .jpg
C. .pdf
D. .exe
View Answer
The .jpg (JPEG) format is one of the most widely used image file formats.
Q55. Which file extension is commonly used for audio files?
A. .mp3
B. .png
C. .pptx
D. .txt
View Answer
MP3 is one of the most popular digital audio file formats due to its efficient compression.
Q56. Which of the following is an example of video conferencing software?
A. Zoom
B. Paint
C. Excel
D. Notepad
View Answer
Zoom is a popular video conferencing platform used for online meetings, classes, and webinars.
Q57. Which key opens the Start Menu in Windows?
A. Tab
B. Windows Key
C. Shift
D. Esc
View Answer
Pressing the Windows key opens the Start Menu in Microsoft Windows.
Q58. Which of the following is an example of an open-source operating system?
A. Linux
B. Windows
C. macOS
D. iOS
View Answer
Linux is an open-source operating system that is widely used in servers, desktops, and mobile devices.
Q59. Which device is commonly used to provide backup power to a computer?
A. UPS
B. Modem
C. Router
D. Hub
View Answer
A UPS (Uninterruptible Power Supply) provides temporary backup power during electricity failures, helping prevent data loss.
Q60. Which of the following is primarily used to connect multiple computers within a local network?
A. Switch
B. Scanner
C. Printer
D. Webcam
View Answer
A network switch connects multiple devices within a Local Area Network (LAN) and enables efficient communication between them.
Q61. What does LAN stand for?
A. Large Area Network
B. Local Area Network
C. Long Area Network
D. Limited Access Network
View Answer
A Local Area Network (LAN) connects computers and devices within a limited geographical area such as a home, office, or school.
Q62. What does WAN stand for?
A. Wide Area Network
B. Wireless Area Network
C. World Area Network
D. Web Access Network
View Answer
A Wide Area Network (WAN) connects computers over large geographical areas. The Internet is the largest example of a WAN.
Q63. Which device forwards data packets between computer networks?
A. Router
B. Keyboard
C. Scanner
D. Monitor
View Answer
A router connects different networks and directs data packets to their correct destinations.
Q64. Which device provides wireless internet connectivity?
A. Printer
B. Wi-Fi Router
C. Keyboard
D. Scanner
View Answer
A Wi-Fi router allows multiple devices to connect to the internet wirelessly.
Q65. Which symbol is commonly used in an email address?
A. #
B. @
C. &
D. %
View Answer
The ‘@’ symbol separates the username from the domain name in an email address.
Q66. Which company developed the Android operating system?
A. Apple
B. Google
C. Microsoft
D. IBM
View Answer
Android is developed by Google and is the world’s most widely used mobile operating system.
Q67. Which of the following is a programming language?
A. HTML
B. Python
C. Chrome
D. Windows
View Answer
Python is a popular high-level programming language known for its simplicity and versatility.
Q68. Which of the following is NOT a programming language?
A. Java
B. C++
C. Microsoft Word
D. Python
View Answer
Microsoft Word is a word processing application, not a programming language.
Q69. Which company developed the Python programming language?
A. Microsoft
B. Google
C. Guido van Rossum
D. IBM
View Answer
Python was created by Guido van Rossum and was first released in 1991.
Q70. What does HTML stand for?
A. HyperText Markup Language
B. HighText Machine Language
C. Hyper Transfer Markup Language
D. HyperText Machine Link
View Answer
HTML is the standard markup language used to create and structure web pages.
Q71. Which programming language is commonly used for web page styling?
A. Python
B. Java
C. CSS
D. C++
View Answer
CSS (Cascading Style Sheets) is used to control the appearance and layout of web pages.
Q72. Which company developed the Chrome web browser?
A. Apple
B. Mozilla
C. Google
D. Microsoft
View Answer
Google Chrome was first released in 2008 and is one of the most widely used web browsers.
Q73. Which company developed the Firefox web browser?
A. Google
B. Mozilla
C. Microsoft
D. Opera
View Answer
Mozilla Firefox is a free and open-source web browser developed by the Mozilla Foundation.
Q74. Which of the following is an example of an email application?
A. Gmail
B. Microsoft Outlook
C. Thunderbird
D. All of the above
View Answer
Gmail, Microsoft Outlook, and Mozilla Thunderbird are widely used email applications and services.
Q75. Which of the following is a social networking platform?
A. Facebook
B. Instagram
C. LinkedIn
D. All of the above
View Answer
Facebook, Instagram, and LinkedIn are popular social networking platforms used for communication and professional networking.
Q76. Which key combination is commonly used to open the Task Manager in Windows directly?
A. Ctrl + Shift + Esc
B. Ctrl + Alt + Delete
C. Alt + Tab
D. Windows + D
View Answer
Ctrl + Shift + Esc directly opens the Windows Task Manager, allowing users to monitor running applications and processes.
Q77. Which key is used to rename a selected file or folder in Windows?
A. F1
B. F2
C. F5
D. F12
View Answer
Pressing the F2 key allows users to rename the selected file or folder in Windows.
Q78. Which key is commonly used to refresh the Windows desktop?
A. F1
B. F3
C. F5
D. F8
View Answer
The F5 key refreshes the current window or desktop and reloads its contents.
Q79. Which of the following is a valid cloud computing service?
A. Google Drive
B. Microsoft OneDrive
C. Dropbox
D. All of the above
View Answer
Google Drive, Microsoft OneDrive, and Dropbox are popular cloud storage and cloud computing services.
Q80. Which technology allows files to be stored and accessed over the Internet instead of only on a local computer?
A. Bluetooth
B. Cloud Computing
C. BIOS
D. BIOS Setup
View Answer
Cloud computing enables users to store, manage, and access data and applications over the Internet from virtually anywhere.
Q81. Which of the following is an example of an operating system?
A. Windows
B. Microsoft Word
C. Google Chrome
D. Adobe Reader
View Answer
Windows is an operating system that manages computer hardware, software, and system resources.
Q82. Which memory loses its data when the computer is turned off?
A. ROM
B. Hard Disk
C. RAM
D. SSD
View Answer
RAM is volatile memory, meaning its contents are erased when the computer is powered off.
Q83. Which device is used to display images and text on a computer?
A. Monitor
B. Keyboard
C. Scanner
D. Microphone
View Answer
A monitor is an output device that displays text, images, videos, and graphical information generated by the computer.
Q84. Which of the following is a web browser?
A. Firefox
B. Windows
C. Excel
D. Android
View Answer
Mozilla Firefox is a popular web browser used to access websites on the Internet.
Q85. What does Wi-Fi primarily provide?
A. Printing
B. Wireless network connectivity
C. File compression
D. Data encryption
View Answer
Wi-Fi enables devices such as computers, smartphones, and tablets to connect to a network wirelessly.
Q86. Which company developed the Android operating system?
A. Apple
B. Google
C. Microsoft
D. Intel
View Answer
Android is developed by Google and is the most widely used mobile operating system worldwide.
Q87. Which of the following stores data permanently?
A. RAM
B. Cache Memory
C. SSD
D. Register
View Answer
An SSD (Solid-State Drive) stores data permanently and provides faster performance than traditional hard disk drives.
Q88. Which shortcut key is commonly used to find text in a document?
A. Ctrl + H
B. Ctrl + F
C. Ctrl + D
D. Ctrl + L
View Answer
Ctrl + F opens the Find dialog box, allowing users to search for words or phrases within a document or webpage.
Q89. Which file extension is commonly used for PDF documents?
A. .docx
B. .pdf
C. .xlsx
D. .pptx
View Answer
The .pdf extension represents Portable Document Format files, which preserve document formatting across different devices.
Q90. Which company developed Microsoft Office?
A. Google
B. Apple
C. Microsoft
D. IBM
View Answer
Microsoft Office is a productivity suite that includes applications such as Word, Excel, PowerPoint, and Outlook.
Q91. Which of the following is used to browse the Internet?
A. Web Browser
B. Compiler
C. Scanner
D. Printer
View Answer
A web browser is software that allows users to access and view websites on the Internet.
Q92. Which of the following is an example of cloud storage?
A. Google Drive
B. Microsoft OneDrive
C. Dropbox
D. All of the above
View Answer
Google Drive, OneDrive, and Dropbox are popular cloud storage services used to store and access files online.
Q93. Which unit is equal to 1,024 Megabytes (MB)?
A. 1 Kilobyte
B. 1 Gigabyte
C. 1 Terabyte
D. 1 Byte
View Answer
1 Gigabyte (GB) is commonly considered equal to 1,024 Megabytes (MB) in binary-based storage calculations.
Q94. Which key is commonly used to cancel or close a dialog box?
A. Enter
B. Esc
C. Tab
D. Shift
View Answer
The Escape (Esc) key is used to cancel an operation or close menus and dialog boxes.
Q95. Which company developed the macOS operating system?
A. Microsoft
B. Apple
C. Google
D. Intel
View Answer
macOS is Apple’s operating system designed for Macintosh computers.
Q96. Which communication technology is commonly used for short-range wireless file transfer?
A. Bluetooth
B. HDMI
C. Ethernet
D. VGA
View Answer
Bluetooth enables wireless communication and file transfer between nearby devices over short distances.
Q97. Which of the following is NOT a web browser?
A. Microsoft Edge
B. Safari
C. Mozilla Firefox
D. Microsoft Excel
View Answer
Microsoft Excel is spreadsheet software, whereas Edge, Safari, and Firefox are web browsers.
Q98. Which computer component performs arithmetic and logical operations?
A. ALU
B. RAM
C. ROM
D. Monitor
View Answer
The Arithmetic Logic Unit (ALU) is a part of the CPU responsible for performing arithmetic calculations and logical operations.
Q99. What does BIOS stand for?
A. Basic Input Output System
B. Binary Input Operating System
C. Basic Internet Operating Service
D. Binary Integrated Output System
View Answer
BIOS is firmware that initializes computer hardware and starts the operating system during the boot process.
Q100. Which statement best describes a computer?
A. A computer is an electronic device that accepts data, processes it according to instructions, stores information, and produces meaningful output.
B. A computer is only used for browsing the Internet.
C. A computer can perform only mathematical calculations.
D. A computer is only an input device.
View Answer
A computer is a versatile electronic device used in education, business, healthcare, communication, research, entertainment, and countless other fields. It processes data efficiently and helps users perform a wide variety of tasks.
This collection of 100 Computer General Knowledge MCQs in English provides a strong foundation in essential computer concepts, including hardware, software, memory, storage devices, operating systems, networking, the Internet, cloud computing, programming basics, and commonly used applications.
Regular practice of these questions can improve your understanding of computer technology and strengthen your digital knowledge. Continue exploring more computer topics and practice quizzes to enhance your learning and stay updated with the latest developments in the world of technology.