220-1101 Mobile Devices Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  Use compressed air to blow out the debris from the port

  Why it's wrong here

  Compressed air is ineffective for heavily compacted lint because the debris is fiber-compressed into the port's narrow cavity; the turbulent stream often fails to overcome the adhesion of the impacted material. Worse, the airflow can redirect loose particles toward the base of the receptacle, pressing them against the Lightning connector's gold-plated pins and worsening the contact obstruction. Canned air also carries no direct mechanical scraping action, so it cannot separate lint that is embedded between the side walls and the connector tongue.

• ✓

  Gently clean the port with a wooden toothpick

  Why this is correct

  A wooden toothpick is the correct first-line tool because wood is non-conductive and softer than the metal contacts inside the Lightning port, allowing safe manual extraction of compacted lint. With the iPhone powered off, gently insert the tapered dry toothpick and use light strokes along the side walls and floor of the cavity to lift debris without scratching the gold-plated pins or shorting exposed connections. The toothpick's rigidity provides enough leverage to break up impacted material while its material properties minimize risk of damaging the port's internal geometry.

• ✗

  Replace the Lightning port assembly

  Why it's wrong here

  Replacing the Lightning port assembly is a last-resort repair that requires desoldering the connector from the logic board or replacing the entire board on many iPhone models, making it invasive, expensive, and risky. It is normally only justified after cleaning fails and diagnostics confirm internal damage, such as bent pins, corrosion, or liquid residue—none of which are indicated by the symptom of slow charging alone. Attempting a board-level replacement first would expose the device to additional failure risks and void warranty without addressing the likely simple obstruction.

• ✗

  Perform a factory reset on the iPhone

  Why it's wrong here

  A factory reset reinstalls the operating system and clears user settings, but the charging problem originates in the physical connection path between the Lightning cable and the port's electrical contacts. Slow charging from debris is purely ohmic/resistive—lint prevents full insertion or creates intermittent contact—so software state has no influence on power delivery. Performing a reset wastes time and risks data loss, and it cannot remove the foreign material restricting current flow to the battery.

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