Question

Which of the following is not an input device of the computer?

• A. Trackball
• B. Image Scanner
• C. Joystick
• D. Sound Card

Hint:

Always distinguish between input devices (send data to computer) and output devices (send data from computer to the user).

Answer 1

The Correct Option is D

An input device is hardware used to send data to a computer, allowing the user to interact with and control it.
Examples include keyboards, mice, scanners, and joysticks.
- Option (A) Trackball: An input device that allows cursor control — input.
- Option (B) Image Scanner: Used to convert physical documents into digital form — input.
- Option (C) Joystick: Used for gaming and simulation control — input.
- Option (D) Sound Card: This is actually an output (and processing) device related to audio. It processes audio signals and sends them to speakers or headphones. While some sound cards may have audio input ports, their primary role is not as an input device for control or data entry.
Thus, $\mathbfSound\ Card$ is the correct choice for "not an input device."