nerdexam
CompTIA

220-802 · Question #521

When using an optical mouse connected via USB on a laptop and experiencing strange cursor movement, which of the following is MOST likely to be the cause? (Select TWO).

The correct answer is B. There is contact with the touchpad E. The surface is interfering with the optical sensor. Erratic cursor movement on a laptop with a USB optical mouse most commonly results from unintended touchpad input or an incompatible surface beneath the optical sensor.

Hardware and network troubleshooting

Question

When using an optical mouse connected via USB on a laptop and experiencing strange cursor movement, which of the following is MOST likely to be the cause? (Select TWO).

Options

  • AThe mouse is failing and should be replaced
  • BThere is contact with the touchpad
  • CThe mouse drivers need to updated
  • DThe laptop is using a capacitive touchscreen
  • EThe surface is interfering with the optical sensor

How the community answered

(44 responses)
  • A
    2% (1)
  • B
    91% (40)
  • C
    2% (1)
  • D
    5% (2)

Why each option

Erratic cursor movement on a laptop with a USB optical mouse most commonly results from unintended touchpad input or an incompatible surface beneath the optical sensor.

AThe mouse is failing and should be replaced

Hardware failure in a mouse typically causes the cursor to stop responding entirely or become unresponsive, not produce erratic movement, making failure a less likely cause than environmental factors.

BThere is contact with the touchpadCorrect

Laptop touchpads remain active alongside USB mice by default, and accidental palm or wrist contact with the touchpad generates simultaneous cursor input that appears as erratic or strange movement.

CThe mouse drivers need to updated

Outdated or corrupt mouse drivers usually result in complete loss of mouse function or device misidentification, not the specific symptom of strange cursor movement.

DThe laptop is using a capacitive touchscreen

A capacitive touchscreen is a display input technology and does not interact with or affect the tracking behavior of a separate USB optical mouse.

EThe surface is interfering with the optical sensorCorrect

Optical mice rely on a contrasting, matte surface to track movement accurately; reflective, transparent, or glass surfaces scatter or confuse the optical sensor's LED and camera, causing unpredictable cursor jumps.

Concept tested: Optical mouse tracking and touchpad interference troubleshooting

Source: https://support.microsoft.com/en-us/windows/troubleshoot-mouse-keyboard-or-touchpad-issues-39b8d14f-4b23-9c37-0247-c5a4e69a1f27

Topics

#optical mouse#touchpad interference#cursor issues#laptop peripherals

Community Discussion

No community discussion yet for this question.

Full 220-802 Practice