Q1. What is the primary function of the CPU in a computer system?
a) To manage the power supply
b) To execute instructions and process data
c) To store data permanently
d) To connect peripheral devices
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Correct Answer: b) To execute instructions and process data
Explanation: The Central Processing Unit (CPU) is the primary component of a computer that performs most of the processing inside. It executes instructions from programs, processes data, and controls other hardware components.
Q2. What is the role of the motherboard in a computer system?
a) To provide storage for data
b) To connect all the components and peripherals
c) To manage network connections
d) To handle input and output devices
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Correct Answer: b) To connect all the components and peripherals
Explanation: The motherboard is the main circuit board of a computer. It connects all components, including the CPU, memory, and peripherals, allowing them to communicate and function together.
Q3. Which of the following is NOT a type of expansion card?
a) Graphics card
b) Network card
c) Sound card
d) Hard drive
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Correct Answer: d) Hard drive
Explanation: Expansion cards, such as graphics, network, and sound cards, are used to add functionality to a computer. A hard drive is a storage device, not an expansion card.
Q4. What is the purpose of the Basic Input/Output System (BIOS)?
a) To store user data
b) To execute startup routines and manage hardware
c) To provide network security
d) To increase the computer’s processing speed
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Correct Answer: b) To execute startup routines and manage hardware
Explanation: The BIOS is firmware that initializes and tests hardware components during the boot process. It also provides runtime services for operating systems and software.
Q5. What type of memory is commonly used for temporary storage while a computer is running?
a) Hard Disk
b) ROM
c) RAM
d) Flash memory
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Correct Answer: c) Mouse
Explanation: The mouse is an input device used to point at, select, and interact with items on a computer screen.
Q6. Which of the following connectors is typically used for a mouse or keyboard?
a) HDMI
b) USB
c) VGA
d) Ethernet
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Correct Answer: b) USB
Explanation: Universal Serial Bus (USB) connectors are commonly used for connecting peripherals such as mice and keyboards to a computer. They offer a simple and universal connection method.
Q7. What is the primary purpose of the power supply unit (PSU) in a computer?
a) To process data
b) To manage network connections
c) To provide electrical power to all components
d) To store software applications
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Correct Answer: c) To provide electrical power to all components
Explanation: The power supply unit (PSU) converts electrical power from an outlet into the appropriate voltages required by the computer’s components. It is essential for powering the system.
Q8. Which cable color is typically associated with Ethernet connections?
a) Red
b) Blue
c) Yellow
d) Green
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Correct Answer: b) Blue
Explanation: Ethernet cables are commonly color-coded blue. They are used to connect computers and other devices to a network.
Q9. What is the purpose of a heat sink in a computer system?
a) To store data
b) To cool down the CPU and other components
c) To manage input/output operations
d) To provide network connectivity
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Correct Answer: b) To cool down the CPU and other components
Explanation: A heat sink is used to dissipate heat away from the CPU or other components. It helps prevent overheating and ensures stable performance.
Q10. Which device is primarily used for printing documents?
a) Monitor
b) Keyboard
c) Printer
d) Scanner
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Correct Answer: c) Printer
Explanation: A printer is used to produce hard copies of digital documents. It transfers text and images onto paper.