📚 Class 2 Computer – Chapter 1: Introduction to Computer (MCQs with Explanation)

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🔹 1. Multiple Choice Questions

1️⃣ What is a computer?

(a) A mechanical machine
(b) An electronic machine
(c) A vehicle
(d) A type of phone
Answer: (b) An electronic machine
Explanation: A computer is an electronic machine that can store, process, and display information.

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2️⃣ Which of the following is an input device?

(a) Monitor
(b) Keyboard
(c) Printer
(d) Speaker
Answer: (b) Keyboard
Explanation: Input devices send data to the computer. Keyboard is used for typing.

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3️⃣ Which of the following is an output device?

(a) Mouse
(b) Scanner
(c) Monitor
(d) Keyboard
Answer: (c) Monitor
Explanation: Output devices show the result from the computer. Monitor displays text, images, and videos.

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4️⃣ What is the brain of the computer?

(a) Monitor
(b) CPU
(c) Keyboard
(d) Printer
Answer: (b) CPU
Explanation: CPU (Central Processing Unit) processes data and gives instructions to other parts.

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5️⃣ Which device is used to store information?

(a) Hard disk
(b) Mouse
(c) Keyboard
(d) Monitor
Answer: (a) Hard disk
Explanation: Storage devices store data for future use. Hard disk, USB, CD, DVD are examples.

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6️⃣ Which of the following is a supercomputer used for?

(a) Playing games
(b) Weather forecasting and space research
(c) Typing documents
(d) Listening to music
Answer: (b) Weather forecasting and space research
Explanation: Supercomputers are very powerful and fast, used for complex tasks.

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7️⃣ Which of these is a portable computer?

(a) Mainframe
(b) Laptop
(c) Supercomputer
(d) Server
Answer: (b) Laptop
Explanation: Laptops are portable computers that can be used anywhere.

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8️⃣ Which of these is a touch screen computer?

(a) Desktop
(b) Tablet
(c) Server
(d) Mainframe
Answer: (b) Tablet
Explanation: Tablets have touchscreen displays and are portable.

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9️⃣ Computers help in which of the following?

(a) Education
(b) Communication
(c) Business
(d) All of the above
Answer: (d) All of the above
Explanation: Computers are used in education, communication, banking, business, entertainment, and science.

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🔟 How does a computer work?

(a) Input → Output → Storage → Processing
(b) Storage → Processing → Input → Output
(c) Input → Processing → Storage → Output
(d) Output → Input → Storage → Processing
Answer: (c) Input → Processing → Storage → Output
Explanation: The computer first receives input, processes data, stores it, and finally produces output.

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🔹 2. Quick Revision Tips

1. Input Devices: Send data to computer (Keyboard, Mouse, Scanner)

2. Output Devices: Show results (Monitor, Printer, Speakers)

3. CPU: Brain of the computer, processes data

4. Storage Devices: Save information (Hard disk, USB)

5. Types of Computers: Supercomputer, Mainframe, PC, Laptop, Tablet

6. Uses of Computers: Education, Communication, Banking, Business, Entertainment, Science

7. Working of Computer: Input → Process → Storage → Output