Question

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

• A. Trackball
• B. Light Pen
• C. Scanner
• D. Plotter

Hint:

Scanner, keyboard, mouse, trackball and light pen are input devices, while printer and plotter are output devices.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:

• The goal of this question is to identify which device among the options is not an input device.

• We need to classify each device based on whether it sends data to the computer (input) or receives/displays data from the computer (output).

Step 2: Detailed Explanation:

• Let us analyze each device listed in the options:

• A. Trackball: A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball. It is used to move the cursor on the screen and is a clear example of an input device.

• B. Light Pen: A light pen is a light-sensitive pointing input device, shaped like a pen, used in conjunction with a computer's CRT monitor. It allows the user to point to displayed objects or draw on the screen, acting as an input device.

• C. Scanner: A scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image to send to the computer. Hence, it is an input device.

• D. Plotter: A plotter is a specialized hardware device used to print vector graphics. Unlike standard printers, it uses pens to draw continuous, high-precision lines on large sheets of paper. Because it presents processed information from the computer to the user, it is an output device.

• Since the Plotter is an output device, it is not an input device.

• This matches Option (D).

Step 3: Final Answer:
The correct option is (D).