Computer Science
Multiple Choice
Questions
(MCQs) – Sets 7
with Detailed Explanations
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SET 7 – Computer Science MCQs
✅ No repetition from Sets 1–6
✅ 10 completely new questions
✅ Each explanation
Level: Class 9–10 / Beginners
1. What is an interpreter?
A. A hardware device
B. A program that translates code line by line
C. An operating system
D. A type of virus
✅ Correct Answer: B
Explanation:
An interpreter is a program that translates high-level programming code into machine language line by line and executes it immediately. Languages like Python use interpreters. If an error occurs, the interpreter stops execution at that line. This makes debugging easier but slower compared to compilers, which translate the entire program at once.
2. What is the main function of a web browser?
A. Store files
B. Display web pages
C. Protect from viruses
D. Write programs
✅ Correct Answer: B
Explanation:
A web browser is software used to access and display web pages on the internet. Examples include Google Chrome, Mozilla Firefox, and Microsoft Edge. Browsers interpret HTML and show text, images, and videos. They allow users to search information, watch videos, and communicate online easily.
3. What is spam?
A. Useful email
B. Computer virus
C. Unwanted or junk messages
D. Operating system
✅ Correct Answer: C
Explanation:
Spam refers to unwanted or junk messages, usually sent in bulk through email or messaging platforms. These messages often advertise products or contain harmful links. Spam can waste time and pose security risks. Email services use spam filters to protect users from such unwanted communications.
4. What does HTTP stand for?
A. High Transfer Text Protocol
B. HyperText Transfer Protocol
C. Home Tool Transfer Program
D. Hyperlink Text Tool Process
✅ Correct Answer: B
Explanation:
HTTP stands for HyperText Transfer Protocol. It is a protocol used for transferring web pages from servers to browsers. When you type a website address, HTTP helps request and deliver the web content. It plays a vital role in web communication and forms the foundation of data exchange on the internet.
5. What is a spreadsheet used for?
A. Drawing pictures
B. Writing letters
C. Performing calculations and organizing data
D. Browsing websites
✅ Correct Answer: C
Explanation:
A spreadsheet is used to organize data in rows and columns and perform calculations using formulas. Examples include MS Excel and Google Sheets. Spreadsheets are used for budgeting, marksheets, and data analysis. They make calculations fast and accurate and help present data clearly using charts.
6. What is the function of a search engine?
A. Create websites
B. Store files
C. Find information on the internet
D. Protect data
✅ Correct Answer: C
Explanation:
A search engine is a tool that helps users find information on the internet. Examples include Google and Bing. Users enter keywords, and the search engine displays relevant results. It saves time by searching millions of web pages quickly and helps users access accurate information efficiently.
7. What is a pixel?
A. A type of software
B. A unit of sound
C. The smallest unit of an image
D. A memory device
✅ Correct Answer: C
Explanation:
A pixel is the smallest unit of a digital image or display. Images are made up of thousands or millions of pixels arranged in a grid. Each pixel represents a color. Higher pixel counts produce clearer images. Pixels are important in photography, graphics design, and screen resolution.
8. What is a password?
A. A type of virus
B. A security key for access
C. A hardware part
D. An output device
✅ Correct Answer: B
Explanation:
A password is a secret combination of characters used to protect accounts and systems from unauthorized access. Passwords help keep personal data secure. Strong passwords include letters, numbers, and symbols. They are essential for email, social media, and online banking security.
9. What is video conferencing?
A. Sending emails
B. Online text chatting
C. Face-to-face communication over the internet
D. Watching movies
✅ Correct Answer: C
Explanation:
Video conferencing allows people to communicate face-to-face using video and audio through the internet. Examples include Zoom and Google Meet. It is widely used for online classes, meetings, and interviews. Video conferencing saves travel time and enables real-time communication across long distances.
10. What is artificial intelligence (AI)?
A. A computer game
B. Human intelligence
C. Machines performing tasks that require intelligence
D. A hardware device
✅ Correct Answer: C
Explanation:
Artificial Intelligence refers to machines that can perform tasks requiring human intelligence, such as problem-solving, speech recognition, and decision-making. Examples include virtual assistants and chatbots. AI helps automate processes and improve efficiency in areas like healthcare, education, and transportation.
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