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Computer Science MCQs

MCQs on Programming, Networking, Database and OS

24 Questions Subject Test
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1
Hard nts Uploaded: 23 Aug 2026

Which memory type stores the BIOS?

  • A RAM
  • B ROM
  • C Virtual Memory
  • D Cache
2
Hard nts Uploaded: 13 Aug 2026

Which of the following best defines 'syntax error'?

  • A Hardware malfunction
  • B Violation of programming language rules
  • C Network failure
  • D Logical mistake in code
3
Hard nts Uploaded: 09 Aug 2026

Which of the following is the fastest memory in a computer?

  • A RAM
  • B Cache
  • C Hard Disk
  • D ROM
4
Hard nts Uploaded: 07 Aug 2026

Which layer of the OSI model is responsible for routing?

  • A Transport Layer
  • B Application Layer
  • C Data Link Layer
  • D Network Layer
5
Hard nts Uploaded: 09 Aug 2026

What is the function of an operating system's kernel?

  • A Design user interfaces
  • B Store internet history
  • C Manage hardware resources directly
  • D Compress files
6
Hard nts Uploaded: 23 Aug 2026

What is the purpose of encryption?

  • A To increase network speed
  • B To compress files
  • C To convert data into a secure, unreadable format
  • D To delete data
7
Hard nts Uploaded: 13 Aug 2026

What does the term 'plug and play' refer to in computing?

  • A Manual driver installation required
  • B A type of virus
  • C A network protocol
  • D Devices that work automatically when connected without manual setup
8
Hard nts Uploaded: 23 Aug 2026

Which memory management technique divides memory into fixed-size blocks?

  • A Swapping
  • B Segmentation
  • C Caching
  • D Paging
9
Hard nts Uploaded: 09 Aug 2026

Which of the following is a characteristic of object-oriented programming?

  • A Sequential execution only
  • B No data types
  • C No functions
  • D Encapsulation
10
Hard nts Uploaded: 13 Aug 2026

What is the function of a subnet mask?

  • A Compile source code
  • B Divide an IP network into smaller sub-networks
  • C Store website data
  • D Encrypt network traffic
11
Hard nts Uploaded: 07 Aug 2026

Which cryptographic technique uses two different keys for encryption and decryption?

  • A Symmetric encryption
  • B Checksum
  • C Asymmetric encryption
  • D Hashing
12
Hard nts Uploaded: 13 Aug 2026

1 Byte equals how many bits?

  • A 32 bits
  • B 4 bits
  • C 16 bits
  • D 8 bits
13
Hard nts Uploaded: 07 Aug 2026

Which of the following is an example of an assistive input device?

  • A Standard Speaker
  • B Braille Keyboard
  • C Standard Monitor
  • D Standard Printer
14
Hard nts Uploaded: 09 Aug 2026

Which sorting algorithm has the best average time complexity?

  • A Quick Sort
  • B Bubble Sort
  • C Selection Sort
  • D Insertion Sort
15
Hard nts Uploaded: 07 Aug 2026

Which of the following best describes 'Big O notation'?

  • A A programming language
  • B A way to express the efficiency or complexity of an algorithm
  • C A network protocol
  • D A type of database index
16
Hard nts Uploaded: 23 Aug 2026

What is the full form of WWW?

  • A World Wide Web
  • B Wide World Web
  • C World Web Wide
  • D World Wide Website
17
Hard nts Uploaded: 23 Aug 2026

Which key combination is used to copy text in Windows?

  • A Ctrl+V
  • B Ctrl+C
  • C Ctrl+X
  • D Ctrl+Z
18
Hard nts Uploaded: 13 Aug 2026

Which of the following is an example of an interpreted language?

  • A Assembly
  • B C++
  • C Python
  • D C
19
Hard nts Uploaded: 09 Aug 2026

What does 'ALU' stand for in computer architecture?

  • A Arithmetic Logic Unit
  • B Advanced Logic Unit
  • C Arithmetic Language Unit
  • D Automated Logic Unit
20
Hard nts Uploaded: 23 Aug 2026

What is the function of a modem?

  • A To manage printers
  • B To store files
  • C To modulate and demodulate signals for internet connectivity
  • D To display graphics
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