Q9. Distinguish between Input unit and Output unit.
Ans. 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 that is, 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.
The output coming from the CPU is in the form of electronic binary signals which needs conversion in some form which can be easily understood by human beings that is, characters, graphical or audio visual. This function of conversion is performed by output units.