Multiple choice

A device, which has similar operation as that of a joystick is

  1. track ball

  2. light pen

  3. mouse

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A trackball is essentially an upside-down mouse - you rotate a ball with your thumb or fingers to control cursor movement, just as a joystick is manipulated by hand to control movement on screen. Both trackballs and joysticks are pointing devices that involve direct manual manipulation to control position, whereas a mouse is moved across a surface and a light pen is dragged across the screen. Trackballs and joysticks share the same fundamental operational principle.

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