Components of the system unit

Question 1

Motherboard

Answer 1

A large board inside the system unit that houses the CPU and other components. All the input/output devices are connected to the motherboard.

Question 2

CPU

Answer 2

The CPU processes the input to the computer. The term CPU is often used interchangeably with microprocessor. One of the ways to quantify microprocessors is their speed of processing instructions. The units for measuring the speed of a microprocessor are megahertz (MHz) and gigahertz (GHz). One megahertz means 1 million cycles per second and 1gigahertz means 1 billion cycles per second. As a comparison, a 200 GHz microprocessor is faster than a 200 MHz microprocessor, and a 300 GHz microprocessor is faster than a 200 GHz microprocessor.

Question 3

Memory

Answer 3

Tiny electronic circuits that store data for processing. It is the internal memory of a computer present on the motherboard.

Question 4

Hard disk drive

Answer 4

Reads data from and writes data to the hard disk. The hard disk is a storage device where the computer stores large amounts of data and instructions.

Question 5

Floppy disk drive

Answer 5

Reads data from and writes data to a floppy disk. Floppy disks can be used to store small amounts of information. They are removable and suitable for transferring data from one computer to another.

Question 6

CD- ROM drive

Answer 6

Reads information from CD-ROMs. CD-ROMs are removable storage devices that store much more information than floppy disks.

Question 7

Power supply

Answer 7

Supplies voltage to the internal components and external devices. The power switch of the system unit is a part of the power supply unit.

Question 8

Fan

Answer 8

Cools the power supply.

Question 9

Speaker

Answer 9

Produces sound.

Question 10

Expansion slots

Answer 10

A set of sockets that you use to attach additional input and output devices to your computer. You can also use these slots to add more memory.

Question 11

Port

Answer 11

An interface to which you connect a device. There are three types of ports: serial, parallel, and USB. Serial and parallel ports are generally used to connect devices such as a keyboard, a mouse, a printer, and a modem. However, USB ports are replacing serial and parallel ports because you can connect external devices through USB ports without restarting a computer. There is another type of port called an infr-Activityred port. It allows two computers or a computer and a device to communicate without the use of wires.