Q1. What is the primary function of the Central Processing Unit (CPU) in a computer system?
a) Storing data
b) Displaying information
c) Processing data and executing instructions
d) Controlling peripheral devices
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Correct Answer: c) Processing data and executing instructions
Explanation: The CPU is often referred to as the brain of the computer. Its primary function is to process data and execute instructions provided by software programs. It performs arithmetic and logical operations, manages data flow, and controls other components of the computer system.
Q2. Which of the following devices is considered an output device?
a) Keyboard
b) Mouse
c) Monitor
d) Scanner
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Correct Answer: c) Monitor
Explanation: A monitor is an output device because it displays the results of the computer’s processing to the user. Unlike input devices, which send data to the computer, output devices receive data from the computer and present it in a human-readable form.
Q3. What is the role of USB ports in a computer system?
a) To connect the computer to the internet
b) To store large amounts of data
c) To connect peripheral devices like keyboard, mouse, and pen drives
d) To improve the processing speed of the computer
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Correct Answer: c) To connect peripheral devices like keyboard, mouse, and pen drives
Explanation: USB ports are versatile connectors used to attach various peripheral devices to a computer, such as keyboards, mice, external storage devices, and more. USB (Universal Serial Bus) ports provide both data transfer and power supply to connected devices.
Q4. Which component is not a part of the Central Processing Unit (CPU)?
a) Arithmetic Logic Unit (ALU)
b) Control Unit (CU)
c) Random Access Memory (RAM)
d) Register
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Correct Answer: c) Random Access Memory (RAM)
Explanation: The CPU consists of the Arithmetic Logic Unit (ALU), Control Unit (CU), and registers, which work together to process data and execute instructions. RAM, however, is a separate component used for temporary data storage during processing.
Q5. Which of the following is an example of an input device?
a) Printer
b) Monitor
c) Keyboard
d) Speaker
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Correct Answer: c) Keyboard
Explanation: A keyboard is an input device because it is used to input data into a computer. Users press keys to send characters, commands, and other data to the computer for processing. Other devices like monitors and speakers are output devices.
Q6. What is the function of a pen drive in a computer system?
a) To input data into the computer
b) To output data from the computer
c) To store and transfer data between computers
d) To increase the processing power of the computer
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Correct Answer: c) To store and transfer data between computers
Explanation: A pen drive, also known as a USB flash drive, is a portable storage device used to store and transfer data between computers. It connects to a computer via a USB port and allows for easy file sharing and backup.
Q7. Which of the following is a necessary step in connecting a computer system?
a) Plugging in the power cord to the monitor
b) Connecting the mouse directly to the monitor
c) Installing software before connecting hardware
d) Configuring the operating system before hardware connections
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Correct Answer: a) Plugging in the power cord to the monitor
Explanation: When setting up a computer system, it is crucial to connect all hardware components properly. This includes plugging in the power cord to the monitor, which allows the display to function. Other hardware, such as the mouse and keyboard, is typically connected to the CPU.
Q8. What is the primary purpose of a computer’s monitor?
a) To input commands
b) To store data
c) To display visual output
d) To process data
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Correct Answer: c) To display visual output
Explanation: The monitor is a visual output device that displays images, videos, and other visual content generated by the computer’s processing. It allows users to interact with the computer by viewing the results of their input and the operations performed by the CPU.
Q9. Which device is essential for connecting a printer to a computer system?
a) USB cable
b) HDMI cable
c) Ethernet cable
d) VGA cable
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Correct Answer: a) USB cable
Explanation: A USB cable is commonly used to connect a printer to a computer. It enables data transfer from the computer to the printer, allowing the user to print documents. While other cables like HDMI and VGA are used for video connections, USB is the standard for peripherals like printers.
Q10. What is the function of the Control Unit (CU) within the CPU?
a) Performing arithmetic and logical operations
b) Storing data and instructions
c) Managing the execution of instructions
d) Displaying output to the user
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Correct Answer: c) Managing the execution of instructions
Explanation: The Control Unit (CU) is a critical part of the CPU that manages the execution of instructions. It directs the operation of the other components of the CPU by fetching instructions from memory, decoding them, and then coordinating their execution with the ALU and other components.