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.