COMPUTER ARCHITECTURE
INPUTOUTPUT DEVICES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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One moves across a surface and the other is stationary
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One is input and the other is output
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One has two and the other has three buttons
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None of the above
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Detailed explanation-1: -With a mouse, the entire device must be moved across a surface and buttons clicked usually with just one finger. But with trackballs, the device remains stationary and a large ball is moved by moving the entire hand, or sometimes just the thumb, across it.
Detailed explanation-2: -Where as a computer mouse over the table surface, the trackball is Stationary. A trackball is a pointing device consisting of a ball held by a socket containing sensors to detect a rotation of the ball about two axes-like an upside-down mouse with an exposed protruding ball.
Detailed explanation-3: -Answer: Trackball is a input device, used to give instructions and data to computer system. It is used to point objects just like we use mouse . Difference from mouse is that in track ball it’s position is fixed and to move the cursor on screen we need to move the ball placed in it .