Computer Science
Multiple Choice
Questions
(MCQs) – Sets 39
with Detailed Explanations
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SET 39 – Computer Science MCQs
✅ No repetition from Sets 1–38
✅ 10 completely new questions
✅ Each explanation
Level: Class 9–10 / Beginners
1. What is artificial intelligence (AI)?
A. Human intelligence
B. Natural intelligence
C. Machine ability to mimic human intelligence
D. Computer repair
✅ Correct Answer: C
Explanation:
Artificial Intelligence, or AI, is a branch of computer science that enables machines to perform tasks that normally require human intelligence. These tasks include learning, reasoning, problem-solving, and decision-making. AI is used in voice assistants, recommendation systems, and self-driving cars.
2. What is machine learning?
A. Manual programming
B. Learning by humans
C. Systems that learn from data
D. Computer hardware
✅ Correct Answer: C
Explanation:
Machine learning is a subset of AI that allows computers to learn from data without being explicitly programmed. The system improves performance through experience. Machine learning is used in spam detection, face recognition, and online recommendations.
3. What is supervised learning?
A. Learning without data
B. Learning with labeled data
C. Learning without feedback
D. Learning by observation
✅ Correct Answer: B
Explanation:
Supervised learning uses labeled data, meaning input data is paired with correct output. The model learns by comparing predictions with known answers. Examples include email spam classification and predicting student marks based on previous records.
4. What is unsupervised learning?
A. Learning with teacher
B. Learning with answers
C. Learning from unlabeled data
D. Learning by instruction
✅ Correct Answer: C
Explanation:
Unsupervised learning works with data that has no predefined labels. The system finds patterns or groupings on its own. It is commonly used for clustering, customer segmentation, and identifying hidden patterns in data.
5. What is neural network?
A. Computer network
B. Brain cell
C. AI model inspired by human brain
D. Database
✅ Correct Answer: C
Explanation:
A neural network is an AI model designed to work like the human brain. It consists of interconnected nodes called neurons. Neural networks are used in image recognition, speech recognition, and language translation.
6. What is natural language processing (NLP)?
A. Human speech
B. Programming language
C. AI that understands human language
D. Network protocol
✅ Correct Answer: C
Explanation:
Natural Language Processing enables computers to understand, interpret, and respond to human language. It is used in chatbots, voice assistants, and translation apps. NLP helps machines interact with humans naturally.
7. What is computer vision?
A. Screen resolution
B. AI that interprets images and videos
C. Hardware device
D. Network security
✅ Correct Answer: B
Explanation:
Computer vision is a field of AI that allows machines to interpret and understand visual data such as images and videos. It is used in facial recognition, medical imaging, and autonomous vehicles.
8. What is chatbot?
A. Hardware tool
B. Software virus
C. AI program that interacts with users
D. Network server
✅ Correct Answer: C
Explanation:
A chatbot is an AI-powered program designed to simulate conversation with users. It can answer questions, provide support, and assist with tasks. Chatbots are used in customer service and online platforms.
9. What is AI ethics?
A. AI speed
B. AI hardware
C. Moral rules for using AI responsibly
D. AI software
✅ Correct Answer: C
Explanation:
AI ethics deals with responsible and fair use of artificial intelligence. It focuses on transparency, privacy, fairness, and avoiding bias. Ethical AI ensures technology benefits society without causing harm.
10. What is automation?
A. Manual work
B. Human labor
C. Use of machines to perform tasks automatically
D. Network process
✅ Correct Answer: C
Explanation:
Automation refers to using machines or software to perform tasks without human intervention. It increases efficiency and accuracy. Automation is widely used in industries, offices, and smart homes.
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