Q21. Which of the following is an example of an I/O device?
a) CPU
b) RAM
c) Hard Drive
d) Printer
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Correct Answer: d) Printer
Explanation: An input/output (I/O) device, such as a printer, is used to interact with the computer by either receiving data from or sending data to the computer.
Q22. What type of cable is typically used to connect a printer to a computer?
a) USB
b) HDMI
c) VGA
d) Ethernet
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Correct Answer: a) USB
Explanation: USB cables are commonly used to connect printers to computers, allowing for easy and efficient data transfer between the two devices.
Q23. What is the primary function of a computer’s power supply unit (PSU)?
a) To manage network traffic
b) To convert AC power to DC power
c) To execute system commands
d) To store files
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Correct Answer: b) To convert AC power to DC power
Explanation: The PSU converts alternating current (AC) from the wall outlet into direct current (DC) required by the computer’s internal components, ensuring proper power delivery.
Q24. Which of the following ports is used for high-speed data transfer between a computer and external devices?
a) USB
b) Ethernet
c) Serial
d) Parallel
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Correct Answer: a) USB
Explanation: Universal Serial Bus (USB) ports are used for high-speed data transfer between computers and external devices. They are versatile and support a range of peripherals.
Q25. Which type of expansion slot is commonly used for graphics cards?
a) PCI
b) AGP
c) PCIe
d) ISA
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Correct Answer: c) PCIe
Explanation: PCI Express (PCIe) slots are commonly used for modern graphics cards due to their high bandwidth and performance capabilities compared to older slots like AGP.
Q26. What is the main advantage of using an SSD over an HDD?
a) Higher storage capacity
b) Lower cost
c) Faster data access speeds
d) Greater data security
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Correct Answer: c) Faster data access speeds
Explanation: Solid-State Drives (SSDs) offer faster data access speeds compared to Hard Disk Drives (HDDs) because they use flash memory, which improves overall system performance and responsiveness.
Q27. What type of memory is used for caching frequently accessed data to speed up performance?
a) RAM
b) ROM
c) Cache memory
d) Flash memory
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Correct Answer: c) Cache memory
Explanation: Cache memory is a small, high-speed memory located close to the CPU that stores frequently accessed data to speed up processing and improve system performance.
Q28. What is the primary function of a computer’s cooling system?
a) To manage network traffic
b) To increase storage capacity
c) To dissipate heat from components
d) To enhance data transfer speeds
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Correct Answer: c) To dissipate heat from components
Explanation: The cooling system in a computer, which includes fans and heat sinks, is designed to dissipate heat generated by components like the CPU and GPU, preventing overheating and maintaining optimal performance.
Q29. Which type of storage device is known for its high durability and resistance to physical shock?
a) Hard Disk Drive (HDD)
b) Solid-State Drive (SSD)
c) Optical Drive
d) Flash Drive
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Correct Answer: d) Flash Drive
Explanation: Flash drives are known for their durability and resistance to physical shock because they have no moving parts, making them ideal for portable storage.
Q30. What is the purpose of the system bus in a computer?
a) To store data
b) To provide power to the components
c) To facilitate communication between CPU, memory, and peripherals
d) To manage network connections
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Correct Answer: c) To facilitate communication between CPU, memory, and peripherals
Explanation: The system bus is a communication system that connects the CPU, memory, and peripheral devices, enabling data transfer and interaction between these components.