Question

A document reader and a light pen both are classical examples of

Answer 1

A document reader and a light pen both are classical examples of input devices.

Answer 2

"1. Light pen is an input device because it is operated externally with the data that are provided externally.

2. Document reader is also an example of input device which reads the electronic file or printed matter by visualisation path and the output is in the form of video.

3. The user can also use it to scan barcodes. Document reader is also used to zoom viewers. "