Computer Science: MCQs

1. Which of the following data structures uses a Last In, First Out (LIFO) strategy?
A) Queue
B) Stack
C) Linked List
D) Binary Tree
Answer: B) Stack

2. What is the binary equivalent of the decimal number 10?
A) 1010
B) 1001
C) 1111
D) 1100
Answer: A) 1010

3. Which of the following is NOT a type of database management system (DBMS)?
A) MySQL
B) Oracle
C) Photoshop
D) SQL Server
Answer: C) Photoshop

4. What is the purpose of an index in a database?
A) To store large binary data
B) To perform complex calculations
C) To speed up data retrieval operations
D) To encrypt sensitive information
Answer: C) To speed up data retrieval operations

5. Which of the following is a characteristic of a high-level programming language?
A) It is machine-dependent
B) It is difficult to read and write
C) It is close to machine language
D) It is easy to read and write
Answer: D) It is easy to read and write

6. What is the main purpose of an operating system’s kernel?
A) To manage user interfaces
B) To execute application programs
C) To manage hardware resources
D) To create backups
Answer: C) To manage hardware resources

7. Which of the following is a type of software testing that involves testing individual units or components of a software system?
A) Integration testing
B) System testing
C) Unit testing
D) Acceptance testing
Answer: C) Unit testing

8. Which programming language is commonly used for data analysis and scientific computing?
A) Java
B) C++
C) Python
D) Ruby
Answer: C) Python

9. What is the purpose of an API (Application Programming Interface)?
A) To analyze data
B) To manage network traffic
C) To define how software components should interact
D) To design user interfaces
Answer: C) To define how software components should interact

10. Which of the following is NOT a type of computer memory?
A) RAM
B) ROM
C) CPU
D) Cache
Answer: C) CPU

11. What does DNS stand for?
A) Domain Name System
B) Data Network Service
C) Digital Naming Service
D) Distributed Network System
Answer: A) Domain Name System

12. Which of the following is a characteristic of a good algorithm?
A) Complexity
B) Length
C) Unpredictability
D) Efficiency
Answer: D) Efficiency

13. What is the role of a web server in the context of the World Wide Web?
A) To design web pages
B) To store databases
C) To host and serve web pages to clients
D) To manage network security
Answer: C) To host and serve web pages to clients

14. What is the purpose of a programming loop?
A) To execute a block of code repeatedly
B) To define variables
C) To perform mathematical operations
D) To create user interfaces
Answer: A) To execute a block of code repeatedly

15. Which of the following is NOT a type of computer virus?
A) Trojan horse
B) Worm
C) Firewall
D) Spyware
Answer: C) Firewall

16. What does IDE stand for in software development?
A) Integrated Development Environment
B) Interactive Design Environment
C) Internet Development Environment
D) Intelligent Design Engine
Answer: A) Integrated Development Environment

17. Which of the following is a function of an operating system’s file management system?
A) To create hardware components
B) To organize and store data on storage devices
C) To design user interfaces
D) To manage network traffic
Answer: B) To organize and store data on storage devices

18. What is the purpose of a data backup in computer systems?
A) To improve processing speed
B) To secure data against loss or corruption
C) To manage network resources
D) To optimize memory usage
Answer: B) To secure data against loss or corruption

19. Which of the following is NOT a type of computer network topology?
A) Ring
B) Star
C) Mesh
D) Linear
Answer: D) Linear

20. What is the role of a DNS server in computer networking?
A) To manage email communication
B) To convert domain names to IP addresses
C) To host websites
D) To encrypt data packets
Answer: B) To convert domain names to IP addresses

21. Which programming language is often used for creating dynamic web pages?
A) C
B) COBOL
C) PHP
D) Fortran
Answer: C) PHP

22. What is the purpose of software documentation?
A) To test software functionality
B) To design user interfaces
C) To explain how software works and how to use it
D) To optimize algorithms
Answer: C) To explain how software works and how to use it

23. What does GUI stand for?
A) Graphical User Interface
B) General User Interface
C) Global User Integration
D) Graphical Unit Instruction
Answer: A) Graphical User Interface

24. Which of the following is a benefit of virtualization technology?
A) Increased hardware costs
B) Reduced energy consumption
C) Slower software performance
D) Limited scalability
Answer: B) Reduced energy consumption

25. What is the purpose of a cookie in web browsing?
A) To store website content
B) To track user activity and preferences
C) To manage network security
D) To optimize search algorithms
Answer: B) To track user activity and preferences

26. Which programming language is often used for game development?
A) COBOL
B) Pascal
C) C#
D) FORTRAN
Answer: C) C#

27. What is the role of a compiler in programming languages like C or C++?
A) To execute the code
B) To debug the code
C) To translate the code into machine-readable instructions
D) To write the code
Answer: C) To translate the code into machine-readable instructions

28. Which of the following is NOT a type of software license?
A) Open-source license
B) Freeware license
C) Hardware license
D) Commercial license
Answer: C) Hardware license

29. Which of the following is NOT a programming language?
A) Java
B) HTML
C) Python
D) SQL
Answer: B) HTML

30. What does CPU stand for?
A) Central Processing Unit
B) Computer Processing Unit
C) Core Processing Unit
D) Central Power Unit
Answer: A) Central Processing Unit

31. What is the output of 5 + 3 * 2?
A) 16
B) 11
C) 10
D) 13
Answer: D) 13

32. Which data structure uses First In, First Out (FIFO) strategy?
A) Stack
B) Queue
C) Linked List
D) Tree
Answer: B) Queue

33. What is the binary equivalent of decimal number 25?
A) 10100
B) 11001
C) 11111
D) 11000
Answer: B) 11001

34. What does HTTP stand for?
A) HyperText Transfer Protocol
B) HyperText Transmission Protocol
C) HyperText Terminal Protocol
D) HyperText Translation Protocol
Answer: A) HyperText Transfer Protocol

35. Which of the following is a markup language used for creating web pages?
A) CSS
B) JavaScript
C) XML
D) PHP
Answer: C) XML

36. Which programming paradigm emphasizes the use of functions and avoids changing state and mutable data?
A) Imperative
B) Declarative
C) Object-Oriented
D) Functional
Answer: D) Functional

37. What is the purpose of a firewall in computer networks?
A) To prevent unauthorized physical access to the network
B) To block malicious software from entering the network
C) To regulate the flow of network traffic based on security rules
D) To increase the speed of data transmission in the network
Answer: C) To regulate the flow of network traffic based on security rules

38. Which sorting algorithm has the best average-case time complexity?
A) Bubble Sort
B) Insertion Sort
C) Quick Sort
D) Selection Sort
Answer: C) Quick Sort

39. What is the primary purpose of an operating system?
A) To manage hardware resources
B) To write programs
C) To create databases
D) To design user interfaces
Answer: A) To manage hardware resources

40. Which of the following is NOT a type of computer network?
A) Local Area Network (LAN)
B) Wide Area Network (WAN)
C) Personal Area Network (PAN)
D) Global Area Network (GAN)
Answer: D) Global Area Network (GAN)

41. What does SQL stand for?
A) Structured Query Language
B) System Query Language
C) Sequential Query Language
D) Standardized Query Language
Answer: A) Structured Query Language

42. Which of the following is a key feature of object-oriented programming?
A) Encapsulation
B) Goto statements
C) Global variables
D) Spaghetti code
Answer: A) Encapsulation

43. What does HTML stand for?
A) HyperText Markup Language
B) High-Level Text Markup Language
C) HyperLink and Text Markup Language
D) HyperText Model Language
Answer: A) HyperText Markup Language

44. Which programming language is commonly used for developing Android apps?
A) Swift
B) Java
C) C++
D) Python
Answer: B) Java

45. What is the purpose of a compiler?
A) To convert high-level language code to machine code
B) To manage databases
C) To create user interfaces
D) To optimize network traffic
Answer: A) To convert high-level language code to machine code

46. Which of the following is NOT a cloud computing service model?
A) Infrastructure as a Service (IaaS)
B) Platform as a Service (PaaS)
C) Software as a Service (SaaS)
D) Database as a Service (DBaaS)
Answer: D) Database as a Service (DBaaS)

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

48. Which of the following is a type of cyber attack that involves tricking users into revealing sensitive information?
A) DDoS attack
B) Phishing attack
C) SQL injection attack
D) Cross-site scripting attack
Answer: B) Phishing attack

49. What is the main purpose of an array in programming?
A) To store multiple values of different data types
B) To store a single value
C) To store values in a random order
D) To store values in a sequential order
Answer: D) To store values in a sequential order

50. Which of the following is a feature of a relational database?
A) Tables with fixed column names
B) No support for transactions
C) Limited data integrity
D) Hierarchical data structure
Answer: A) Tables with fixed column names

51. What is the role of an IP address in computer networks?
A) To identify the type of device
B) To encrypt data packets
C) To uniquely identify a device on the network
D) To manage network traffic
Answer: C) To uniquely identify a device on the network

52. What is the purpose of version control systems like Git?
A) To manage database transactions
B) To track changes in code and collaborate on software development
C) To encrypt network traffic
D) To optimize search algorithms
Answer: B) To track changes in code and collaborate on software development

53. Which of the following is NOT a fundamental programming control structure?
A) Sequence
B) Iteration
C) Decision
D) Concatenation
Answer: D) Concatenation

54. What is the role of a compiler in the software development process?
A) To execute the code
B) To write the code
C) To debug the code
D) To translate the code into machine-readable instructions
Answer: D) To translate the code into machine-readable instructions

55. Which of the following is a key feature of cloud computing?
A) Limited scalability
B) Local storage only
C) On-demand access to resources
D) High upfront costs
Answer: C) On-demand access to resources

Computer Science: MCQs

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