Q1. Which of the following is NOT a characteristic of a computer system?
a) Speed
b) Accuracy
c) Intelligence
d) Automation
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Correct Answer: c) Intelligence
Explanation: Computers are known for their speed, accuracy, and ability to perform automated tasks. However, they lack intelligence, as they can only execute tasks based on the given instructions without any independent decision-making.
Q2. Which component of the computer performs arithmetic and logical operations?
a) Keyboard
b) Mouse
c) Processing Unit
d) Monitor
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Correct Answer: c) Processing Unit
Explanation: The processing unit, specifically the Arithmetic Logic Unit (ALU) within the CPU, is responsible for performing all arithmetic and logical operations in a computer system.
Q3. What is the primary purpose of a keyboard?
a) To store data
b) To process data
c) To input data
d) To display data
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Correct Answer: c) To input data
Explanation: The keyboard is an input device that allows users to input data into a computer by pressing keys that correspond to characters, numbers, or functions.
Q4. Which device is typically used to point, select, and interact with items on a screen?
a) Printer
b) Scanner
c) Mouse
d) CPU
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Correct Answer: c) Mouse
Explanation: The mouse is a pointing device that allows users to interact with the graphical user interface (GUI) of a computer by moving the cursor and selecting items on the screen.
Q5. What does VDU stand for in computing?
a) Virtual Display Unit
b) Visual Display Unit
c) Video Display Unit
d) Variable Display Unit
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Correct Answer: b) Visual Display Unit
Explanation: VDU stands for Visual Display Unit, which is another term for a computer monitor. It is an output device that displays the visual output of a computer.
Q6. Which of the following is NOT an input device?
a) Scanner
b) Printer
c) Microphone
d) Keyboard
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Correct Answer: b) Printer
Explanation: A printer is an output device, not an input device. It takes digital data from a computer and produces a physical output, usually on paper.
Q7. Which type of memory is non-volatile and used for permanent storage?
a) RAM
b) ROM
c) Cache
d) Register
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Correct Answer: b) ROM
Explanation: ROM (Read-Only Memory) is a non-volatile memory used to store firmware or software that is not intended to be modified frequently. It retains data even when the computer is turned off.
Q8. Which of the following input devices is used to capture images and convert them into digital form?
a) Printer
b) Scanner
c) Keyboard
d) Plotter
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Correct Answer: b) Scanner
Explanation: A scanner is an input device that captures images, documents, or photos and converts them into digital form for processing, storage, or editing on a computer.
Q9. Which of the following is an output device that provides hard copy output?
a) Monitor
b) Keyboard
c) Printer
d) Mouse
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Correct Answer: c) Printer
Explanation: A printer is an output device that produces hard copies of documents, images, or other digital content on paper or other print media.
Q10. Which type of computer memory is temporary and loses its contents when power is turned off?
a) ROM
b) Hard Drive
c) RAM
d) SSD
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Correct Answer: c) RAM
Explanation: RAM (Random Access Memory) is a type of volatile memory that temporarily stores data that is currently being used by the computer. It loses its contents when the computer is powered off.