30/01/2026
*Computer MCQs – IBA STS (50 Questions)*
1. Which device is used to convert digital signals into analog signals?
Answer: Modem
2. What is the brain of the computer?
Answer: CPU
3. Which memory is volatile?
Answer: RAM
4. Which memory is non-volatile?
Answer: ROM
5. Which software manages computer hardware and software resources?
Answer: Operating System
6. Which is a popular operating system?
Answer: Microsoft Windows
7. A device used to enter data into a computer is called?
Answer: Input Device
8. A device used to display output from a computer is called?
Answer: Output Device
9. Which device is primarily used for typing?
Answer: Keyboard
10. Which device is used to move the cursor on the screen?
Answer: Mouse
11. Which device displays computer output visually?
Answer: Monitor
12. Which device is used to get a printed copy of documents?
Answer: Printer
13. Which device converts printed text into digital form?
Answer: Scanner
14. Which storage device stores large amounts of data permanently?
Answer: Hard Disk
15. Which is a portable storage device?
Answer: USB
16. Computers operate using which number system?
Answer: Binary System
17. The smallest unit of data in a computer is?
Answer: Bit
18. 1 byte is equal to how many bits?
Answer: 8 bits
19. Which translates high-level code to machine code all at once?
Answer: Compiler
20. Which translates high-level code line by line?
Answer: Interpreter
21. Software that protects against viruses is called?
Answer: Antivirus
22. Which protects a network from unauthorized access?
Answer: Firewall
23. A global network connecting millions of computers is called?
Answer: Internet
24. WWW stands for?
Answer: World Wide Web
25. Which software is used to access websites?
Answer: Browser
26. Which is a popular web browser?
Answer: Google Chrome
27. System for sending electronic messages is called?
Answer: Email
28. A network limited to a small area like a building is called?
Answer: LAN
29. A network covering a large area like cities or countries is called?
Answer: WAN
30. A network that connects cities in a region is called?
Answer: MAN
31. Which device connects a computer to the internet via telephone lines?
Answer: Modem
32. Which device directs data packets in a network?
Answer: Router
33. Which device connects multiple devices in a network but does not route data?
Answer: Switch
34. Which memory is temporary and erased when computer is off?
Answer: RAM
35. Which memory is permanent and cannot be modified easily?
Answer: ROM
36. Programs that perform tasks for users are called?
Answer: Application Software
37. Physical parts of a computer are called?
Answer: Hardware
38. Software that helps manage computer resources is called?
Answer: System Software
39. Software used for writing documents is called?
Answer: MS Word
40. Software used for spreadsheets and calculations is called?
Answer: MS Excel
41. Software used for presentations is called?
Answer: MS PowerPoint
42. A structured collection of data is called?
Answer: Database
43. Which language is used to manage databases?
Answer: SQL
44. Standard code to represent characters in computers is?
Answer: ASCII
45. The part of CPU that performs arithmetic and logic operations is?
Answer: ALU
46. High-speed memory between CPU and RAM is called?
Answer: Cache Memory
47. Making a copy of data to prevent loss is called?
Answer: Backup
48. Storage accessible via the internet is called?
Answer: Cloud Storage
49. Protecting computers and networks from attacks is called?
Answer: Cyber Security
50. Which is a measure of computer speed?
Answer: Clock Speed