Which of the following is an example of an input device?

• A. Deskjet printer
• B. Monitor
• C. Keyboard
• D. Speaker

Answer: (C)

An input device is hardware used to provide data and control signals to a computer. The keyboard is a primary example of an input device because it allows users to enter text, commands, and other inputs into the computer's system. Each keystroke tells the computer what you want it to do, making it essential for interaction with software applications and operating systems.

In contrast, the other choices serve different purposes. A Deskjet printer is an output device; it produces a physical copy of documents processed by the computer. A monitor also functions as an output device by displaying visual information from the computer. Similarly, a speaker outputs sound, allowing users to hear audio generated by the computer. Each of these devices is crucial for computing but serves to output information rather than input it.