Which of the following groups of devices are only input devices?

Correct option is B

The correct answer is Joystick, Microphone, Scanner. Input devices are those that allow users to send data or commands to a computer system. A Joystick is used for gaming and control inputs, a Microphone converts sound waves into digital signals, and a Scanner converts images or text into digital format. All three serve the purpose of feeding data into a system, making option (b) the correct set of only input devices.
Important Key Points:
1. Input Devices Definition: Hardware components that send data or control signals to a computer.
2. Examples: Keyboard, mouse, scanner, joystick, microphone, barcode reader, webcam, etc.
3. Output Devices Definition: Display or present information to the user (e.g., monitor, printer, speaker).
4. Combination Devices: Some modern devices, like touchscreens, act as both input and output devices.
5. Usage: Input devices are essential for user interaction, data entry, and multimedia input.
Knowledge Booster:
· (a) Keyboard, Printer, Light Pen: Printer is an output device, not an input device.
· (c) Mouse, Monitor, Joystick: Monitor is an output device used for display purposes.
· (d) Mouse, Microphone, Speaker: Speaker is an output device producing sound output.
· Input devices can be categorized into manual, direct data entry and pointing devices, enhancing interaction efficiency with modern computing systems.