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      Question

      Which of the following looks like an upside-down mouse

      that requires the ball to be rotated manually with a finger for moving the cursor on the computer screen?
      A Trackball Correct Answer Incorrect Answer
      B Digitiser Correct Answer Incorrect Answer
      C Light pen Correct Answer Incorrect Answer
      D Joystick Correct Answer Incorrect Answer

      Solution

      The correct answer is A

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