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1. What is the main function of the CPU in a computer system?
a) To store data and instructions
b) To perform arithmetic and logic operations
c) To control input and output devices
d) *To execute instructions from memory*
Rationale: The CPU is the central processing unit that processes data and
instructions from memory and performs arithmetic and logic operations.
2. What is the difference between RAM and ROM in a computer system?
a) RAM is volatile and ROM is non-volatile
b) *RAM is read-write and ROM is read-only*
c) RAM is faster and ROM is slower
d) RAM is larger and ROM is smaller
Rationale: RAM is random access memory that can be read and written to, while
ROM is read-only memory that stores data permanently.
3. What is the purpose of a network interface card (NIC) in a computer system?
a) To connect the computer to a power source
b) To connect the computer to a monitor
c) *To connect the computer to a network*
d) To connect the computer to a printer
Rationale: A NIC is a hardware component that enables a computer to
communicate with other devices on a network.
4. What is the difference between a hub and a switch in a network system?
a) A hub is active and a switch is passive
b) A hub is wireless and a switch is wired
c) *A hub broadcasts data to all ports and a switch sends data to specific ports*
d) A hub supports multiple protocols and a switch supports only one protocol
Rationale: A hub is a device that connects multiple devices on a network and
broadcasts data to all ports, while a switch is a device that connects multiple
devices on a network and sends data to specific ports based on the destination
address.
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