Q31. Which of the following best describes a computer’s operating system?
a) Hardware component that processes data
b) Software that manages computer hardware and software resources
c) Device used to input data into a computer
d) Program that displays images on the screen
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Correct Answer: b) Software that manages computer hardware and software resources
Explanation: The operating system (OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. It acts as an intermediary between users and the computer hardware, enabling the execution of applications.
Q32. What type of device is a modem?
a) Input device
b) Output device
c) Communication device
d) Storage device
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Correct Answer: c) Communication device
Explanation: A modem is a communication device that modulates and demodulates signals for data transmission over telephone lines, cable systems, or satellite connections. It enables computers to connect to the internet or communicate with other devices over a network.
Q33. Which of the following is a function of the power supply unit (PSU) in a computer?
a) Converts electrical power from an outlet into usable power for the computer
b) Increases the speed of the CPU
c) Stores data for quick access
d) Outputs visual data to the monitor
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Correct Answer: a) Converts electrical power from an outlet into usable power for the computer
Explanation: The power supply unit (PSU) converts electrical power from an outlet (typically AC) into a form that the computer’s internal components can use (typically DC). It provides the necessary power to run the computer’s motherboard, CPU, storage devices, and other peripherals.
Q34. What is the primary role of a graphics processing unit (GPU) in a computer system?
a) Managing network connections
b) Performing arithmetic operations
c) Rendering images and video
d) Storing files and data
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Correct Answer: c) Rendering images and video
Explanation: The GPU is a specialized processor designed to accelerate the rendering of images, video, and animations. It is essential for graphics-intensive tasks such as gaming, video editing, and 3D rendering, providing a significant performance boost over general-purpose CPUs for these applications.
Q35. Which of the following is an example of volatile memory?
a) Hard disk drive
b) Solid-state drive
c) Random Access Memory (RAM)
d) Read-Only Memory (ROM)
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Correct Answer: c) Random Access Memory (RAM)
Explanation: Volatile memory, such as RAM, requires power to maintain the stored information. When the computer is turned off, the data stored in RAM is lost. This contrasts with non-volatile memory like ROM and storage devices, which retain data even when the computer is powered down.
Q36. What does the term ‘booting’ refer to in computing?
a) Installing a new operating system
b) Turning on the computer and starting the operating system
c) Saving a file to the hard drive
d) Shutting down the computer
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Correct Answer: b) Turning on the computer and starting the operating system
Explanation: Booting is the process of starting a computer and loading the operating system into RAM. This process begins when the computer is powered on and involves a series of steps, including running the BIOS, loading system files, and initializing hardware components.
Q37. Which of the following devices is primarily used for permanent data storage?
a) RAM
b) CPU
c) Hard disk drive (HDD)
d) Network interface card (NIC)
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Correct Answer: c) Hard disk drive (HDD)
Explanation: The hard disk drive (HDD) is a permanent storage device that stores data, files, and applications even when the computer is turned off. Unlike volatile memory like RAM, the data on an HDD is retained until it is intentionally deleted or the drive is formatted.
Q38. What is the purpose of the CMOS battery in a computer?
a) To power the CPU
b) To maintain the date and time settings when the computer is off
c) To store files permanently
d) To cool the internal components
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Correct Answer: b) To maintain the date and time settings when the computer is off
Explanation: The CMOS battery provides power to the CMOS chip, which stores important system information, including the system clock (date and time) and BIOS settings. This battery ensures that these settings are preserved even when the computer is turned off.
Q39. Which device can be used to connect a computer to a wireless network?
a) Ethernet cable
b) USB flash drive
c) Wireless adapter
d) HDMI cable
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Correct Answer: c) Wireless adapter
Explanation: A wireless adapter is a device that allows a computer to connect to a wireless network (Wi-Fi). It can be an internal component built into the computer or an external device connected via a USB port. This adapter communicates with a wireless router to access the internet or other network resources.
Q40. What is the function of an Ethernet port on a computer?
a) To connect a monitor
b) To connect to a wired network
c) To transfer files to a USB drive
d) To output audio to speakers
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Correct Answer: b) To connect to a wired network
Explanation: An Ethernet port is used to connect a computer to a wired network, providing internet access or enabling communication with other devices on the same network. Ethernet connections are known for their reliability and speed compared to wireless connections.