Correct Answer - Option 4 : Scanner
The correct answer is Scanner.
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Scanner
- A scanner is a device usually connected to a computer.
- Its main function is to scan or take a picture of the document, digitize the information and present it on the computer screen.
- Pointing device
- A pointing device is an input interface that allows a user to input spatial data to a computer.
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Common pointing devices
- Mouse
- Trackball
- Joystick
- Pointing stick
- Wii Remote
- Finger tracking
- Graphics tablet
- Stylus
- Finger tracking
The question asks for pointing input device, i.e. an input device that can be used to point the cursor. Of all the options given scanner is not a pointing input device.
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Track Ball
- The trackball is a pointing device consisting of a ball housed in a socket containing sensors to detect rotation of the ball about two axes, similar to an upside-down mouse.
- As the user rolls the ball with a thumb, fingers, or palm the pointer on the screen will also move.
- Tracker balls are commonly used on CAD workstations
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Digitizing Tablet
- A digitizer tablet is a peripheral device that allows users to draw on a computer screen.
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Joystick
- A joystick is a lever-type device that can be moved in several directions.
- Used to control the movement of an image on a computer or similar display screen.