Q71. Which type of memory is used to store firmware or system software?
a) RAM
b) ROM
c) SSD
d) Cache
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Correct Answer: b) ROM
Explanation: ROM (Read-Only Memory) is used to store firmware or system software that is permanently programmed into the computer. Unlike RAM, ROM retains its data even when the computer is powered off, making it suitable for storing essential system instructions and the BIOS.
Q72. What is the function of a computer’s motherboard?
a) To provide external storage
b) To manage power supply
c) To house and connect all internal components
d) To output data to peripherals
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Correct Answer: c) To house and connect all internal components
Explanation: The motherboard is the main circuit board of a computer that houses and connects all internal components, including the CPU, RAM, storage devices, and expansion cards. It facilitates communication between these components and provides connectors for peripherals.
Q73. Which device is used to input text and commands into a computer?
a) Printer
b) Monitor
c) Keyboard
d) Speaker
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Correct Answer: c) Keyboard
Explanation: A keyboard is an input device used to input text, numbers, and commands into a computer. It consists of keys for letters, numbers, and special functions, allowing users to interact with software and operating systems.
Q74. What is the purpose of a cooling fan in a computer system?
a) To increase storage capacity
b) To enhance audio quality
c) To cool down internal components and prevent overheating
d) To manage network traffic
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Correct Answer: c) To cool down internal components and prevent overheating
Explanation: A cooling fan is used to dissipate heat generated by internal components such as the CPU, GPU, and power supply. It helps maintain optimal operating temperatures and prevent overheating, which can lead to system instability or damage.
Q75. Which of the following devices is used for inputting scanned documents into a computer?
a) Webcam
b) Printer
c) Scanner
d) Microphone
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Correct Answer: c) Scanner
Explanation: A scanner is an input device used to convert physical documents, such as printed pages or photographs, into digital formats. It captures images of the documents and saves them to the computer for electronic storage, editing, or sharing.
Q76. What is the role of an external hard drive in a computer system?
a) To manage software applications
b) To provide additional storage space
c) To process data and execute instructions
d) To connect to the internet
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Correct Answer: b) To provide additional storage space
Explanation: An external hard drive provides additional storage space for files, data, and backups. It connects to the computer via USB, Thunderbolt, or other interfaces, offering a portable and expandable solution for managing large amounts of data.
Q77. What is the function of the system clock in a computer?
a) To store data
b) To manage network connections
c) To synchronize the timing of all operations within the computer
d) To enhance graphics performance
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Correct Answer: c) To synchronize the timing of all operations within the computer
Explanation: The system clock generates a constant timing signal that synchronizes the operation of the CPU and other components. It ensures that all parts of the computer work together in harmony, coordinating tasks and operations with precise timing.
Q78. Which of the following best describes a computer’s RAM?
a) A type of permanent storage
b) A volatile memory used for temporary data storage
c) A device for cooling the CPU
d) An external input device
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Correct Answer: b) A volatile memory used for temporary data storage
Explanation: RAM (Random Access Memory) is volatile memory used for temporary storage of data that is actively being used or processed by the CPU. It provides fast access to data and instructions but loses its contents when the computer is turned off.
Q79. What is the primary purpose of a network switch?
a) To connect devices to a network and direct data traffic
b) To provide power to network devices
c) To store network data
d) To manage network security
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Correct Answer: a) To connect devices to a network and direct data traffic
Explanation: A network switch is a device that connects multiple devices within a network and directs data traffic between them. It ensures that data is sent to the correct destination device, improving network efficiency and performance.
Q80. Which of the following components is crucial for the graphical display of images on a computer screen?
a) Hard disk
b) Graphics Processing Unit (GPU)
c) RAM
d) Network card
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Correct Answer: b) Graphics Processing Unit (GPU)
Explanation: The Graphics Processing Unit (GPU) is crucial for rendering and displaying images, videos, and animations on a computer screen. It processes graphical data and performs complex calculations required for rendering visuals, enhancing the overall graphics performance of the computer.