220-1101 Question #235: Real Exam Question with Answer & Explanation

Question

A user reports the touch screen on an Android smartphone is not responding to any input. The technician has cleared the cache, restarted the phone, and ensured the phone is fully charged. The issue still persists. Which of the following should the technician replace on the phone to MOST likely resolve the issue?

Options

• ASystem on a chip
• BAccelerometer
• CDigitizer
• DGyroscope

Explanation

The digitizer is the component responsible for converting touch input into electrical signals, so its replacement is the most likely solution for an unresponsive touchscreen after basic software troubleshooting fails.

Common mistakes.

• A. The System on a Chip (SoC) contains the main processing units; while essential, a faulty SoC would typically cause much broader system failures, not just an unresponsive touchscreen.
• B. An accelerometer detects changes in the phone's orientation and movement, which is unrelated to touch input.
• D. A gyroscope detects orientation and angular velocity, used for features like screen rotation or VR, and is not responsible for touch input.

Concept tested. Smartphone hardware components - Digitizer

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