COMPUTER FUNDAMENTALS

COMPUTER HARDWARE

INPUT DEVICES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This device is an input and an output device
A
Keyboard
B
Stylus / Light pen
C
Barcode reader
D
Touchscreen
Explanation: 

Detailed explanation-1: -A touch screen is the only device which works as both an input and an output device. You view the options available to you on the screen (output) and you then use your finger to touch the option that you have chosen (input). Touch screens work particularly well with a menu driven interface.

Detailed explanation-2: -The various devices, such as smartphones, information kiosks, computers, laptop displays, tablets, and cash registers, all have a touch screen. Instead than using touch-sensitive input, some touch screens use a grid of infrared beams to detect the presence of a finger.

Detailed explanation-3: -Tactile output is a technology that provides the user with a physical response when providing input. For example, some smartphones have a tactile output of a small bumping feeling when touching the touch screen.

Detailed explanation-4: -For instance, a keyboard or computer mouse is an input device for a computer, while monitors and printers are output devices. Devices for communication between computers, such as modems and network cards, typically perform both input and output operations.

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