50 Best Computer Science MCQs

Enhance your computer science skills with a

collection of carefully selected multiple-choice

questions MCQs. Covering topics such as

Programming data structured, algorithms,

databases, operating systems, computer

networks, and software, these

MCQs are ideal for students, competitive exam

aspirants, and tech enthusiasts. Test your

understanding, identify knowledge gaps and

strengthen your fundamentals with quick and

effective practice.

Enhance your computer science skills with a
collection of carefully selected multiple-choice
questions MCQs.

Best Computer Science MCQs

1.What does CPU stand for?
A) Central Process Unit
B) Central Processing Unit
C) Computer Personal Unit
D) Central Peripheral Unit
Answer: B

2.Which data structure uses FIFO?
A) Stack
B) Queue
C) Tree
D) Graph
Answer: B

3.Which language is commonly employed for web page formatting?
A) HTML
B) Python
C) CSS
D) SQL
Answer: C

4.What is the brain of the computer?
A) RAM
B) CPU
C) ROM
D) HDD
Answer: B

5.Which one is operating system?
A) Oracle
B) Linux
C) Python
D) MySQL
Answer: B

6.Binary numbers use which digits?
A) 0–7
B) 0–9
C) 0 and 1
D) 1 and 2
Answer: C

7.What does RAM stand for?
A) Random Access Memory
B) Read Access Memory
C) Run Access Memory
D) Rapid Access Memory
Answer: A

8.Which protocol is used for web browsing?
A) FTP
B) SMTP
C) HTTP
D) TCP
Answer: C

9.Which company developed Java?
A) Microsoft
B) Apple
C) Sun Microsystems
D) IBM
Answer: C

10.What is the full form of HTML?
A) Hyper Text Markup Language
B) High Text Machine Language
C) Hyperlink Markup Language
D) Hyper Tool Multi Language
Answer: A

11.Which device is used to connect networks?
A) Monitor
B) Router
C) Keyboard
D) Printer
Answer: B

12.Which memory is non-volatile?
A) RAM
B) Cache
C) ROM
D) Register
Answer: C

13. Which sorting algorithm performs best on avarage?
A) Bubble Sort
B) Quick Sort
C) Selection Sort
D) Insertion Sort
Answer: B

14.Which symbol is used for comments in Python?
A) //
B)
C) #
D) /* */
Answer: C

15. What does URL stand for?
A) Uniform Resource Locator
B) Universal Reference Link
C) Uniform Reference Locator
D) Unified Resource Link
Answer: A

16. Which database language is used to query databases?
A) HTML
B) SQL
C) XML
D) CSS
Answer: B

17. Which data structure uses LIFO?
A) Queue
B) Stack
C) Linked List
D) Tree
Answer: B

18. What is the extension of Python files?
A) .java
B) .py
C) .html
D) .cpp
Answer: B

19.Which of the following function key shortcuts is used to refresh a webpage?
A) F1
B) F3
C) F5
D) F9
Answer: C

20. What does GUI stand for?
A) Graphical User Interface
B) General User Interface
C) Graph User Internet
D) Graphic Utility Interface
Answer: A

21. Which among these is not a programming language?
A) Python
B) Java
C) HTML
D) C++
Answer: C

22. Which topology connects all devices to a central hub?
A) Bus
B) Ring
C) Star
D) Mesh
Answer: C

23. What is phishing?
A) Fishing online
B) Cyber attack to steal information
C) Virus removal
D) Data backup
Answer: B

24. Which company developed Windows OS?
A) Apple
B) IBM
C) Microsoft
D) Google
Answer: C

25. Which of the following decimal equivalent of binary 1010?
A) 8
B) 10
C) 12
D) 14
Answer: B

26. Which layer of the OSI model handles routing?
A) Physical
B) Data Link
C) Network
D) Session
Answer: C

28. Which device stores permanent data?
A) RAM
B) Cache
C) Hard Disk
D) Register
Answer: C

29. What is an algorithm?
A) Programming language
B) Step-by-step procedure to solve a problem
C) Computer virus
D) Hardware device
Answer: B

30. Which search engine is developed by Google?
A) Bing
B) Yahoo
C) DuckDuckGo
D) Google Search
Answer: D

31. Which of the following is cloud storage?
A) Google Drive
B) RAM
C) CPU
D) BIOS
Answer: A

32. What does LAN stand for?
A) Large Area Network
B) Local Area Network
C) Light Area Network
D) Long Area Network
Answer: B

33. Which language is used for Android development?
A) Swift
B) Kotlin
C) PHP
D) Ruby
Answer: B

34. Which operation is performed by the ALU?
A) Arithmetic and Logic
B) Input and Output
C) Storage
D) Networking
Answer: A

35. Which of the following shortcuts key is used for copying in Windows?
A) Ctrl + X
B) Ctrl + V
C) Ctrl + C
D) Ctrl + P
Answer: C

36. Which number system uses base 16?
A) Binary
B) Decimal
C) Octal
D) Hexadecimal
Answer: D

37. Which file format is used for webpages?
A) .exe
B) .html
C) .mp3
D) .doc
Answer: B

38.What is malware?
A) Useful software
B) Harmful software
C) Programming language
D) Hardware device
Answer: B

39. Which protocol is used to send emails?
A) HTTP
B) FTP
C) SMTP
D) TCP
Answer: C

40. Which company created the iPhone?
A) Samsung
B) Apple
C) Nokia
D) Sony
Answer: B

41. Which type of software is MS Word?
A) System Software
B) Application Software
C) Utility Software
D) Firmware
Answer: B

42. What does IP stand for in networking?
A) Internet Protocol
B) Internal Program
C) Internet Process
D) Internal Protocol
Answer: A

43. Which of these is an example of an input device?
A) Printer
B) Monitor
C) Keyboard
D) Speaker
Answer: C

44. Which company developed the C language?
A) Bell Labs
B) Google
C) Apple
D) IBM
Answer: A

45. Which data structure consists of nodes and edges?
A) Array
B) Stack
C) Graph
D) Queue
Answer: C

46. What is the full form of PDF?
A) Portable Document Format
B) Public Data File
C) Program Document File
D) Printed Data Format
Answer: A

48. Which is faster memory?
A) HDD
B) SSD
C) RAM
D) Cache
Answer: D

49. Which company owns Android?
A) Microsoft
B) Google
C) Apple
D) IBM
Answer: B

50. Which SQL command is used to remove a table?
A) DELETE
B) REMOVE
C) DROP
D) ERASE
Answer: C