Q11. What type of device is a scanner?
a) Input device
b) Output device
c) Storage device
d) Processing device
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Correct Answer: a) Input device
Explanation: A scanner is an input device that converts physical documents, images, or other materials into a digital format that can be processed and stored by a computer. It captures data from the physical world and inputs it into the computer system.
Q12. Which component is known as the ‘brain’ of the computer?
a) Hard Disk
b) Central Processing Unit (CPU)
c) Random Access Memory (RAM)
d) Graphics Processing Unit (GPU)
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Correct Answer: b) Central Processing Unit (CPU)
Explanation: The CPU is often referred to as the ‘brain’ of the computer because it handles all the processing tasks. It interprets and executes instructions from programs, performing arithmetic, logical, control, and input/output operations as directed by the instructions.
Q13. What is the purpose of Random Access Memory (RAM) in a computer?
a) To store permanent files
b) To process data
c) To temporarily store data and instructions for quick access
d) To display data to the user
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Correct Answer: c) To temporarily store data and instructions for quick access
Explanation: RAM is a type of volatile memory used by the CPU to store data and instructions that are actively being used. It allows for quick access to data, speeding up processing tasks. Unlike permanent storage, RAM is cleared when the computer is turned off.
Q14. Which device is commonly used to input handwritten text or drawings into a computer?
a) Monitor
b) Mouse
c) Stylus with a graphics tablet
d) Joystick
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Correct Answer: c) Stylus with a graphics tablet
Explanation: A stylus used with a graphics tablet is a common input device for entering handwritten text, drawings, or designs into a computer. This setup is particularly useful for graphic design, digital art, and similar tasks requiring precision input.
Q15. How does a USB pen drive connect to a computer system?
a) Through a serial port
b) Through an HDMI port
c) Through a USB port
d) Through a VGA port
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Correct Answer: c) Through a USB port
Explanation: A USB pen drive connects to a computer through a USB port, allowing for the transfer of data between the pen drive and the computer. The USB (Universal Serial Bus) standard is widely used for connecting various peripherals and storage devices.
Q16. What is the main function of an Arithmetic Logic Unit (ALU) within the CPU?
a) Managing memory
b) Controlling data flow
c) Performing arithmetic and logical operations
d) Executing software programs
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Correct Answer: c) Performing arithmetic and logical operations
Explanation: The ALU is a critical component of the CPU responsible for carrying out arithmetic operations like addition, subtraction, multiplication, and division, as well as logical operations such as comparisons. It is essential for processing mathematical calculations and making decisions within the CPU.
Q17. Which of the following is not a common input device?
a) Printer
b) Mouse
c) Keyboard
d) Microphone
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Correct Answer: a) Printer
Explanation: A printer is an output device used to produce physical copies of digital documents or images. It receives data from the computer and converts it into a printed format. Input devices, such as a mouse, keyboard, and microphone, send data to the computer.
Q18. What does the acronym USB stand for?
a) Universal Serial Bus
b) Uniform System Bus
c) Universal System Board
d) United Serial Board
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Correct Answer: a) Universal Serial Bus
Explanation: USB stands for Universal Serial Bus, a standardized interface used to connect various devices to a computer, such as storage devices, input devices, and peripherals. It allows for both data transfer and power supply, making it a versatile and widely adopted standard.
Q19. Which of the following devices would you connect to a VGA port?
a) Monitor
b) Keyboard
c) USB flash drive
d) Printer
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Correct Answer: a) Monitor
Explanation: A VGA (Video Graphics Array) port is used to connect a monitor to a computer, enabling the display of video output. It is an analog connection type that has been widely used for connecting display devices, though it is being gradually replaced by digital connectors like HDMI and DisplayPort.
Q20. What is the primary purpose of a power cord in a computer system?
a) To connect peripheral devices
b) To supply electrical power to the computer
c) To transfer data between components
d) To enhance processing speed
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Correct Answer: b) To supply electrical power to the computer
Explanation: The power cord is a critical component that connects the computer to an electrical outlet, providing the necessary power for the system to operate. Without a power cord, the computer would not be able to turn on or function.