Computer Science MCQs

Our website offers a wide range of Computer Science MCQs covering core topics such as data structures, algorithms, programming languages, databases, operating systems, networking, software engineering, and artificial intelligence. Each question is designed to test knowledge and improve problem-solving skills, with clear explanations provided for better understanding. Ideal for students, professionals, and exam aspirants, this platform simplifies learning and helps prepare effectively for academic tests and competitive exams.

Q1. Which cloud platform is most widely used in 2025 for enterprise applications?

Correct Answer: B

AWS remains the leading cloud provider with the largest market share.

Q2. Which programming language is most popular for AI/ML in 2025?

Correct Answer: A

Python dominates AI/ML due to its libraries like TensorFlow, PyTorch, and scikit-learn.

Q3. Which database type is best suited for handling unstructured data?

Correct Answer: B

NoSQL databases such as MongoDB handle unstructured and semi-structured data efficiently.

Q4. Which cybersecurity practice is recommended against ransomware?

Correct Answer: B

Regular data backup ensures recovery after ransomware attacks.

Q5. Which protocol is used for secure communication over the web?

Correct Answer: C

HTTPS uses SSL/TLS for secure communication.

Q6. Which technology is the backbone of cryptocurrencies?

Correct Answer: B

Blockchain ensures secure, decentralized cryptocurrency transactions.

Q7. Which company introduced the Copilot AI in Visual Studio Code?

Correct Answer: B

Microsoft introduced GitHub Copilot to help developers write code using AI.

Q8. Which of the following is an example of a version control system?

Correct Answer: B

Git is the most widely used distributed version control system.

Q9. Which AI tool became popular in 2023–2025 for generative responses?

Correct Answer: C

ChatGPT by OpenAI became one of the most popular generative AI tools.

Q10. Which company is leading in quantum computing research?

Correct Answer: C

IBM is one of the leaders in developing quantum computers.

Q11. Which concept in AI focuses on making models explainable?

Correct Answer: B

XAI helps interpret and explain AI model decisions.

Q12. Which cloud service model provides infrastructure resources?

Correct Answer: A

IaaS provides virtualized computing infrastructure like servers and storage.

Q13. Which emerging field combines biology with computing?

Correct Answer: B

Bioinformatics integrates biological data analysis using computational tools.

Q14. Which operating system is widely used in servers worldwide?

Correct Answer: B

Linux dominates the server OS market due to stability and security.

Q15. Which big data framework is most popular for distributed data processing?

Correct Answer: B

Apache Spark is widely used due to speed and real-time data processing capabilities.

Q16. Which law predicts the doubling of transistors on chips every two years?

Correct Answer: B

Moore’s Law states transistor count doubles every 18–24 months.

Q17. Which is the most used front-end JavaScript framework in 2025?

Correct Answer: B

React is the most widely adopted front-end framework.

Q18. Which cloud storage service is part of Google Workspace?

Correct Answer: B

Google Drive is included in Google Workspace for cloud storage.

Q19. Which cybersecurity attack involves overwhelming a server with requests?

Correct Answer: C

DDoS floods a server with traffic, making it unavailable.

Q20. Which AI learning type uses trial and error for training?

Correct Answer: C

Reinforcement Learning trains agents through rewards and penalties.

Q21. Which company developed the TensorFlow library?

Correct Answer: C

Google developed TensorFlow for machine learning and AI.

Q22. Which storage type is fastest among the following?

Correct Answer: B

SSDs are faster than HDDs and optical/magnetic storage.

Q23. Which programming paradigm does C language follow?

Correct Answer: C

C is a procedural programming language.

Q24. Which is the most common operating system for smartphones?

Correct Answer: B

Android has the largest market share in smartphones.

Q25. Which database query language is standard for relational databases?

Correct Answer: B

SQL is the standard language for relational databases.

Q26. Which software development model uses sprints and iterations?

Correct Answer: B

Agile emphasizes iterative development with short sprints.

Q27. Which AI branch focuses on understanding human language?

Correct Answer: B

NLP enables computers to understand and process human language.

Q28. Which protocol is mainly used for sending emails?

Correct Answer: A

SMTP (Simple Mail Transfer Protocol) is used to send emails.

Q29. Which of the following is an open-source operating system?

Correct Answer: B

Linux is the most widely used open-source operating system.

Q30. Which cybersecurity method uses encryption for data security?

Correct Answer: B

Encryption converts data into unreadable format for unauthorized users.

Q31. Which IoT protocol is lightweight and widely used?

Correct Answer: C

MQTT is lightweight and optimized for IoT communication.

Q32. Which type of AI is capable of general human-level intelligence?

Correct Answer: B

General AI (AGI) refers to AI with human-level cognitive abilities.

Q33. Which scheduling algorithm gives priority to the shortest job?

Correct Answer: C

SJF (Shortest Job First) prioritizes jobs with the shortest execution time.

Q34. Which search algorithm is used in AI for optimal pathfinding?

Correct Answer: C

A* Search is widely used for shortest path finding in AI.

Q35. Which tool is used for containerization of applications?

Correct Answer: B

Docker is used for containerizing applications.

Q36. Which 5G feature enables very low latency communication?

Correct Answer: B

URLLC (Ultra-Reliable Low-Latency Communication) enables critical real-time applications.

Q37. Which protocol secures wireless networks?

Correct Answer: B

WPA3 is the latest standard for securing Wi-Fi networks.

Q38. Which AI model is designed for image recognition tasks?

Correct Answer: B

Convolutional Neural Networks (CNNs) are widely used for image recognition.

Q39. Which cloud deployment model is shared by multiple organizations?

Correct Answer: C

Community Cloud is shared among organizations with common goals.

Q40. Which blockchain type allows public participation without permission?

Correct Answer: D

Public blockchains like Bitcoin and Ethereum are open to everyone.

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