BASIC COMPUTER KNOWLEDGE PART-1

1.  What is computer ?

Ans.  An electronic device that stores,  retrieves, 

and processes data, and can be 

programmed with instructions. A 

computer is composed of hardware and 

software, and can exist in a variety of 

sizes and configurations.

2.   Types of Computers ?

Ans.    1.Mini Mainframe Computers

Very powerful, used by large 

organisations such an banks to control 

the entire business operation. Very 

expensive.

2.Personal Computers

Cheap and easy to use. Often used as 

stand-alone computers or in a network. 

May be connected to large mainframe 

computers within big companies.

3.  Hardware Components ?

Ans.  INPUT DEVICES

(a) The Mouse

Used to ‘drive’ Microsoft Windows.

(b) The Keyboard

The keyboard is still the commonest 

way of entering information into a 

computer.

(c) Tracker Balls

an alternative to the traditional mouse 

and often used by graphic designers.

(d) Scanners

A scanner allows you to scan printed material 

and convert it into a file format that may be 

used within the PC.

(e) Touch Pads

A device that lays on the desktop and responds 

to pressure.

(f) Light Pens

Used to allow users to point to areas on a 

screen.

(g) Joystick 

Many games require a joystick for the proper 

playing of the game