Q11. What does CPU stand for?
a) Central Power Unit
b) Central Processing Unit
c) Central Performance Unit
d) Central Programming Unit
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Correct Answer: b) Central Processing Unit
Explanation: CPU stands for Central Processing Unit, which is the primary component of a computer that performs most of the processing inside a computer. It is often referred to as the “brain” of the computer.
Q12. Which part of the computer is responsible for executing instructions?
a) RAM
b) Hard drive
c) CPU
d) GPU
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Correct Answer: c) CPU
Explanation: The CPU (Central Processing Unit) is responsible for executing instructions from software programs. It performs arithmetic, logic, control, and input/output operations as directed by the instructions.
Q13. Which of the following is a characteristic of third-generation computers?
a) Use of vacuum tubes
b) Use of transistors
c) Use of integrated circuits
d) Use of microprocessors
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Correct Answer: c) Use of integrated circuits
Explanation: Third-generation computers, developed during the mid-1960s to 1970s, used integrated circuits (ICs), which significantly increased the processing power and efficiency compared to earlier generations that used transistors.
Q14. Which device is commonly used for inputting text into a computer?
a) Monitor
b) Keyboard
c) Printer
d) Speaker
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Correct Answer: b) Keyboard
Explanation: A keyboard is the most common input device used to enter text, numbers, and other characters into a computer. It consists of keys that are pressed to generate corresponding characters.
Q15. Which of the following is an example of an output device?
a) Mouse
b) Monitor
c) Scanner
d) Microphone
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Correct Answer: b) Monitor
Explanation: A monitor is an output device that displays visual information to the user, such as text, images, and videos, based on the data processed by the computer.
Q16. Which of the following is not considered hardware?
a) RAM
b) Operating System
c) Hard Drive
d) Motherboard
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Correct Answer: b) Operating System
Explanation: Hardware refers to the physical components of a computer, such as RAM, hard drives, and motherboards. The operating system is software that manages hardware and other software on a computer.
Q17. What is the main function of the ALU (Arithmetic Logic Unit) in the CPU?
a) To manage memory
b) To perform arithmetic and logical operations
c) To control input/output operations
d) To store data
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Correct Answer: b) To perform arithmetic and logical operations
Explanation: The ALU (Arithmetic Logic Unit) is a critical component of the CPU that performs arithmetic operations like addition and subtraction and logical operations like comparison.
Q18. Which of the following software is essential for a computer to operate and manage hardware?
a) Application software
b) Utility software
c) System software
d) Open-source software
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Correct Answer: c) System software
Explanation: System software, such as the operating system, is essential for a computer to function. It manages the hardware, provides a platform for running application software, and handles basic tasks like file management.
Q19. What is the role of an input device in a computer system?
a) To display data
b) To store data
c) To send data to the CPU
d) To execute instructions
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Correct Answer: c) To send data to the CPU
Explanation: Input devices, such as keyboards and mice, are used to send data and instructions to the CPU, which then processes the data and executes the corresponding tasks.
Q20. What type of software is designed to perform maintenance tasks on a computer?
a) Application software
b) System software
c) Utility software
d) Proprietary software
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Correct Answer: c) Utility software
Explanation: Utility software is designed to perform maintenance tasks that help improve or maintain the performance of a computer, such as disk cleanup, antivirus scanning, and system backup.