Q51. Which of the following is the main function of the Arithmetic Logic Unit (ALU) in the CPU?
a) Storing data
b) Managing input and output devices
c) Performing arithmetic and logical operations
d) Controlling the flow of information
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Correct Answer: c) Performing arithmetic and logical operations
Explanation: The Arithmetic Logic Unit (ALU) is a critical component of the CPU that performs arithmetic (such as addition and subtraction) and logical (such as AND, OR, NOT) operations. It is essential for processing data and executing instructions within a computer system.
Q52. What does USB stand for?
a) Universal System Bus
b) Unified Serial Board
c) Universal Serial Bus
d) United System Bridge
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Correct Answer: c) Universal Serial Bus
Explanation: USB stands for Universal Serial Bus, a standard interface that allows communication between devices and a host controller, such as a computer. It is used for connecting a wide variety of peripherals, including keyboards, mice, printers, and external storage devices.
Q53. What type of device is a tablet?
a) Input device
b) Output device
c) Storage device
d) Mobile computing device
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Correct Answer: d) Mobile computing device
Explanation: A tablet is a mobile computing device that combines the features of a computer and a smartphone. It typically has a touchscreen interface and is used for various tasks such as browsing the internet, watching videos, reading e-books, and using apps. Tablets are portable and can operate independently without a keyboard or mouse.
Q54. Which of the following components is used to cool the CPU?
a) Power supply
b) Heat sink
c) Hard drive
d) Ethernet cable
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Correct Answer: b) Heat sink
Explanation: A heat sink is a component attached to the CPU to dissipate heat and keep it cool during operation. It often works in conjunction with a fan to draw heat away from the CPU, preventing overheating and maintaining optimal performance. Proper cooling is essential for the longevity and stability of the CPU.
Q55. What is the main purpose of a cache memory in a computer system?
a) To store the operating system
b) To provide additional storage
c) To temporarily store frequently accessed data for faster retrieval
d) To connect peripherals to the computer
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Correct Answer: c) To temporarily store frequently accessed data for faster retrieval
Explanation: Cache memory is a small, high-speed memory located close to the CPU that temporarily stores frequently accessed data and instructions. This reduces the time the CPU needs to access data from the main memory (RAM), thereby speeding up processing and improving overall system performance.
Q56. Which of the following is considered a portable storage device?
a) Motherboard
b) USB flash drive
c) Monitor
d) RAM
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Correct Answer: b) USB flash drive
Explanation: A USB flash drive is a portable storage device that can be easily connected to a computer via a USB port. It allows users to store, transfer, and back up data between different devices. USB flash drives are small, lightweight, and convenient for carrying data on the go.
Q57. What is the function of a sound card in a computer?
a) To manage network connections
b) To provide audio input and output
c) To enhance video performance
d) To increase storage capacity
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Correct Answer: b) To provide audio input and output
Explanation: A sound card is an internal expansion card that provides audio input and output capabilities to a computer. It enables the computer to play sound through speakers or headphones and allows for the recording of audio through microphones. Sound cards are essential for multimedia applications and gaming.
Q58. Which of the following devices can be used to input handwritten data into a computer?
a) Scanner
b) Keyboard
c) Graphics tablet
d) Monitor
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Correct Answer: c) Graphics tablet
Explanation: A graphics tablet is an input device that allows users to input handwritten data, drawings, and designs into a computer using a stylus or pen. The tablet senses the stylus’s movement and pressure, translating it into digital form, making it a valuable tool for artists, designers, and professionals who require precise input.
Q59. What does the term ‘gigabyte’ refer to in computing?
a) A type of CPU
b) A unit of processing power
c) A unit of data storage capacity
d) A software application
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Correct Answer: c) A unit of data storage capacity
Explanation: A gigabyte (GB) is a unit of data storage capacity that is equivalent to approximately 1 billion bytes (1,024 megabytes). It is commonly used to measure the size of files, the capacity of storage devices, and the amount of memory in computers and other digital devices.
Q60. Which of the following is a common use for a tablet computer?
a) Running complex software applications
b) Server management
c) Internet browsing, media consumption, and reading e-books
d) Network administration
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Correct Answer: c) Internet browsing, media consumption, and reading e-books
Explanation: Tablet computers are primarily used for tasks such as internet browsing, media consumption (watching videos, listening to music), and reading e-books. Their portability, ease of use, and touchscreen interface make them ideal for these activities, although they may not be suitable for running complex software applications or managing servers.