3. (a) Write three basic functions of different input devices.
Answers
Answer:
Keyboard
Keyboard is the most common and very popular input device which helps to input data to the computer. The layout of the keyboard is like that of traditional typewriter, although there are some additional keys provided for performing additional functions.
Mouse
Mouse is the most popular pointing device. It is a very famous cursor-control device having a small palm size box with a round ball at its base, which senses the movement of the mouse and sends corresponding signals to the CPU when the mouse buttons are pressed.
Joystick
Joystick is also a pointing device, which is used to move the cursor position on a monitor screen. It is a stick having a spherical ball at its both lower and upper ends. The lower spherical ball moves in a socket. The joystick can be moved in all four directions.
Answer:
The three basic input devices are :
1. Keyboard
2. Mouse
3. Scanner
Explanation:
1. Keyboard : It is used to type commands, texts, etc. It is a very popular device that allows the users to take input and then feed the particular data inside the computer system from where the CPU fetches the data and the processing is done.
2. Mouse : It is used to point to a software system or any particular item displayed by the monitor. It allows the user to move the mouse pointer and select or perform different operations displayed on the screen.
3. Scanner : It is an input device which allows the user to scan certain documents, pictures, etc. and allows that to process the digital image to the CPU, from where the CPU fetches the digital data input by the scanner and then displays on the screen.
#SPJ2