Which of the following is an example of Input Device of a computer?

Concept: A computer’s peripherals are classified by the direction data flows relative to the CPU. An input device sends data or control signals INTO the computer for processing (a user action becomes a signal the CPU can process). An output device takes information the CPU has already processed and presents it OUT to the user in a human-usable form (text, image, or sound).

Application: A mouse is moved by hand and its buttons/scroll wheel are pressed by the user; these physical actions are converted into positional (coordinate) and click signals that travel INTO the computer for processing. This is exactly the input-device definition above, so Mouse is the example of an input device among the given options.

Cross-check — the other three options all move data in the opposite direction, computer to user, which is why none of them qualifies as an input device:

• Printer: receives already-processed digital content from the computer and renders it as a physical, printed copy — data flows OUT of the computer.

• Speaker: receives an electrical audio signal already produced by the computer and converts it into audible sound for the user to hear — data flows OUT of the computer.

• Monitor: receives a video signal already produced by the computer and renders it as a visual display — data flows OUT of the computer.

Result: Printer, Speaker, and Monitor are all output devices; only Mouse carries a user action into the computer, confirming Mouse as the correct input-device example.