Question

Mouse, trackball and touchpad are the examples of devices.
1. pointing input
2. scanning output
3. pointing output
4. scanning input
5.

Answer 1

Correct Answer - Option 1 : pointing input

The correct answer is pointing input.

• ​Pointing device
  • A pointing device is an input interface that allows a user to input spatial data to a computer. 
  • Common pointing devices
    • Mouse
    • Trackball
    • Joystick
    • Pointing stick
    • Wii Remote
    • Finger tracking
    • Graphics tablet
    • Stylus
    • Finger tracking

• 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 axis, 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​.
• Mouse:-
  • The most common pointing input device is mouse which enables the user to point the cursor and click where the user wants to use it.
• Touchpad:-
  • A touchpad is also called a trackpad, is a type of input device for computers that does the same things like a computer mouse.
  • It is made up of a flat, touch-sensitive surface that the user slides one or more fingers on to move the cursor on the screen.