A technician is troubleshooting a smartphone that frequently powers off even though the battery indicator shows 30% remaining. The device is running the latest OS and has no visible physical damage. Which diagnostic step should the technician perform FIRST?

Check the charging port for debris or damage.

Perform a factory reset to rule out software corruption.

Replace the battery immediately without further testing.

Run a battery health diagnostic using the manufacturer's built-in tool or a trusted third-party app.

A technician is replacing a faulty charging port on a smartphone. After disconnecting the old port, what is the correct next step?

Power on the phone to test the old port before disposal.

Install the new port and reconnect the flex cable, ensuring it is seated properly.

Apply adhesive to the new port before installation.

Calibrate the new port using a multimeter.

Before replacing a smartphone's battery, which safety precaution is most important?

Power off the device and disconnect it from the charger

CompTIAA+ Core 1

Domain 1Objective 4

Troubleshooting 220-1201 Practice Questions (Page 1)

Part of the Mobile devices domain, which accounts for 13% of the 220-1201 exam. CompTIA does not publish an official question count, but from its 90-minute exam (~35–60 total, ~5–8 in this domain), expect 1–2 from this objective — we provide 30 practice questions to prepare you well beyond it. (estimate)

30questions here

6free pages

7concepts

13%of the exam

Questions 1–5

1foundation · easy
A user reports that their tablet's screen is cracked and the touch input is erratic. After confirming the digitizer is damaged, what is the most appropriate solution?
Select an answer first
2application · medium
A technician is troubleshooting a smartphone that frequently powers off even though the battery indicator shows 30% remaining. The device is running the latest OS and has no visible physical damage. Which diagnostic step should the technician perform FIRST?
Select an answer first
3application · medium
A technician is replacing a faulty charging port on a smartphone. After disconnecting the old port, what is the correct next step?
Select an answer first
4foundation · easy
A user reports that their smartphone's screen is unresponsive to touch, but the device still powers on and displays the home screen. Which hardware component is most likely faulty?
Select an answer first
5foundation · easy
Before replacing a smartphone's battery, which safety precaution is most important?
Select an answer first

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Troubleshooting 220-1201 Practice Questions (Page 1)

Questions 1–5

A user reports that their tablet's screen is cracked and the touch input is erratic. After confirming the digitizer is damaged, what is the most appropriate solution?

A technician is troubleshooting a smartphone that frequently powers off even though the battery indicator shows 30% remaining. The device is running the latest OS and has no visible physical damage. Which diagnostic step should the technician perform FIRST?

A technician is replacing a faulty charging port on a smartphone. After disconnecting the old port, what is the correct next step?

A user reports that their smartphone's screen is unresponsive to touch, but the device still powers on and displays the home screen. Which hardware component is most likely faulty?

Before replacing a smartphone's battery, which safety precaution is most important?

Keep studying — Mobile devices