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The mouse pointer moves erratically, what is the possible cause? The mouse

  • A.ball is dirty
  • B.is not connected
  • C.driver is not installed properly
  • D.has an incorrect IRQ setting

Answer: A

Correct answer: ball is dirty

A mechanical mouse translates the ball's motion through two rollers, and dirt on them makes the pointer jump or stick in one axis. A driver or IRQ fault would stop the mouse working rather than make it erratic.

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