Question

what role do input unit and output unit play in a computer system???

Answer 1

both output and input plays an important role in computer system. without input we will not able to get output and output is very essential as it is the result, outcome.

Answer 2

The function of an input device is to provide data and control signals to an information processing systemlike a computer. There are several different kinds ofinput devices used in a computer. These include a keyboard, mouse, scanner, microphone, joy stick and bar code reader, among others.

or

The output unit is formed by the output devices attached to the computer. 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