Which of the following is not purely output device?
A) Printer
B) Speaker
C) Plotter
D) Screen
Answers
D) Screen
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Screen is not purely output device
The Screen is not purely an output device.
Explanation : The Screen is also called a Visual Display Unit (VDU) or monitor. It is the most popular input-output device used today because it works as both an input and output device for interactive processing.
For inputting information into the processor, the keyboard is used, and for outputting information, a VDU or monitor is used to display information and to receive messages and processed information from the computer on the screen.
Video Display Terminal, or VDT commonly referred to as the combination of the VDU (Visual Display Unit) and the keyboard, which is an input-output device.