Q81. What does the term ‘resolution’ refer to in the context of a computer monitor?
a) The amount of data stored on the monitor
b) The speed of the monitor refresh rate
c) The clarity of the image displayed, measured in pixels
d) The power consumption of the monitor
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Correct Answer: c) The clarity of the image displayed, measured in pixels
Explanation: In the context of a computer monitor, ‘resolution’ refers to the clarity of the image displayed, which is measured in pixels (e.g., 1920×1080). Higher resolution means more pixels are used to display the image, resulting in finer detail and sharper visuals.
Q82. What is the main function of the power supply unit (PSU) in a computer?
a) To process data
b) To manage the computer’s display
c) To convert electrical power from an outlet to usable power for the computer components
d) To connect to external devices
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Correct Answer: c) To convert electrical power from an outlet to usable power for the computer components
Explanation: The power supply unit (PSU) converts electrical power from an outlet into various lower voltages required by the computer components. It provides stable and reliable power to the motherboard, CPU, and other internal hardware.
Q83. Which type of storage device is most commonly used for long-term data storage in a computer?
a) RAM
b) SSD
c) CPU
d) Cache
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Correct Answer: b) SSD
Explanation: An SSD (Solid-State Drive) is commonly used for long-term data storage in a computer due to its speed, reliability, and non-volatile nature. Unlike RAM or cache, SSDs retain data even when the computer is turned off, making them suitable for storing operating systems, applications, and files.
Q84. What is the purpose of a firewall in a computer network?
a) To increase storage capacity
b) To block unauthorized access and protect the network from cyber threats
c) To manage network traffic
d) To enhance graphics performance
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Correct Answer: b) To block unauthorized access and protect the network from cyber threats
Explanation: A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It helps protect the network from unauthorized access and cyber threats by blocking harmful traffic and allowing legitimate communication.
Q85. Which of the following components is responsible for handling input from a keyboard?
a) GPU
b) RAM
c) Keyboard controller
d) Hard drive
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Correct Answer: c) Keyboard controller
Explanation: The keyboard controller is responsible for handling input from the keyboard. It translates keystrokes into signals that the computer’s CPU can process and then sends the corresponding data to the operating system for appropriate actions.
Q86. What type of device is a webcam?
a) Input device
b) Output device
c) Storage device
d) Cooling device
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Correct Answer: a) Input device
Explanation: A webcam is an input device that captures video and images and sends them to a computer. It is commonly used for video conferencing, streaming, and taking photos. It captures visual data, which is then processed by the computer.
Q87. Which component of a computer is primarily responsible for executing program 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 primarily responsible for executing program instructions. It performs calculations, processes data, and manages the execution of software applications, making it the core component for running and controlling computer programs.
Q88. What is the main advantage of using cloud storage?
a) Higher physical storage capacity
b) Access from anywhere with an internet connection
c) Faster data processing speed
d) Lower power consumption
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Correct Answer: b) Access from anywhere with an internet connection
Explanation: The main advantage of using cloud storage is the ability to access data from anywhere with an internet connection. Cloud storage provides flexibility and convenience by allowing users to store and retrieve files remotely, without being limited to a specific device or location.
Q89. What does the acronym ‘HDMI’ stand for in the context of video connections?
a) High-Definition Multimedia Interface
b) High-Density Multimedia Input
c) High-Digital Motion Interface
d) High-Definition Model Input
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Correct Answer: a) High-Definition Multimedia Interface
Explanation: HDMI stands for High-Definition Multimedia Interface. It is a standard for transmitting high-definition video and audio signals between devices such as computers, televisions, and projectors. HDMI supports both video and audio over a single cable.
Q90. Which type of software is used to manage and organize files and folders on a computer?
a) Operating System
b) Word Processor
c) Web Browser
d) Graphics Editor
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Correct Answer: a) Operating System
Explanation: The operating system (OS) is responsible for managing and organizing files and folders on a computer. It provides the file system and user interface for creating, accessing, and managing files and directories, as well as controlling overall system operations.