What is an input unit? Give its significance.

Q. What is an input unit? Give its significance.

Answer :-

The input unit is formed by the input devices attached to the computer. Examples of input devices and media are: keyboard, mouse, magnetic ink character reader (MICR), optical mark reader (OMR), optical character reader (OCR), joystick etc.

The input unit is responsible for taking input and converting it into computer understandable form (the binary code). Since a computer operates on electricity, it can understand only the language of electricity i.e., either ON or OFF or high voltage or low voltage. That means a computer can understand two stages ON/OFF or High/Low voltage or the binary language that uses just two symbols : 1 for ON and 0 for OFF.

• All the inputs consisted of data (on which the action was to be performed) as well as the instruction (the action to be taken).

 
 
	 
S. No.
 
	 
INPUT
 
	 
DATA
 
	 
INSTRUCTION
 
 
 
	 
1.
 
	 
Add 2 and 3
 
	 
2, 3
 
	 
Add
 
 
 
	 
2.
 
	 
Print "Hello World"
 
	 
"Hello World"
 
	 
Print