1. What is trackball?

Ans : A track ball looks like an upside down mouse. Unlike the mouse, the trackball remains stationary. It has a tall that is rotated to move the cursor on the screen.

2. Define Touch pad?

Ans : A touch pad is commonly used in laptops to move the cursor on the screen by moving your finger on the touch pad.

3. What is a monitor. What are its types?

Ans : A monitor is an Visual Display Unit . Its of two types,

    i) CRT Monitor:

           Cathode Ray Tube monitor look like television set and its outdated.

    ii) TFT LCD Monitor :

      Thin  Film Transistor  Liquid Crystal Display monitor is thinner and gives sharper images with less power consumption compared to CRT Monitors.