Input Device | MCQs

Explanation

A mechanical mouse uses a rubber ball to detect movement as it rolls on a surface.

The movement of the ball turns internal rollers that track the cursor’s direction and speed.

Explanation

A mouse helps users select items and point to objects on the computer screen.

It is a primary input device for graphical user interfaces.

Explanation

The touch screen is an Input device and an Output device. 

Not only is it capable of accepting input, but it also displays the output from the computer.

Explanation

A scanner scans images, printed text, handwriting or an object and converts it to a digital image. 

Scanner is an output device. 

Scanner founder: Russell Kirsch

Russell Kirsch belongs to USA.

Explanation

Explanation

OCR scans the text optically, character by character, converts them into a machine readable code, and stores the text on the system memory.

OCR is an input device used to read a printed text.

AGM 24-12-2022

Explanation

A keyboard is a physical input device, so it is considered hardware.

It allows the user to interact with the computer by typing commands or data.

Explanation

Keyboard is an input device.

Keyboard is similar to electric typewriter.

Keyboard uses serial port to connect with computer.

Keys on keyboard are of mainly three types:

Alphanumeric keys: letters and numbers 

Punctuation keys: comma, period, semicolon, etc.

Special keys: function keys, arrow keys, caps lock key, etc. 

Explanation

Printer is an output device because it produces a hard copy of digital data.

Mouse, Scanner, and Keyboard are all input devices used to send data to the computer.

Explanation