A mobile device shuts down unexpectedly even though the battery indicator shows a high charge level. Which hardware issue is most likely causing this behavior?

A failing battery that cannot deliver consistent power

A technician is using a mobile diagnostic app to troubleshoot a smartphone that has intermittent Wi-Fi disconnects. The app shows the phone's signal strength is -85 dBm. What does this reading indicate?

The signal is moderate and should be stable.

The signal is weak and likely causing the disconnects.

The signal is strong and the issue is elsewhere.

The signal is too strong and needs attenuation.

A user's smartphone cannot connect to a corporate Wi-Fi network that requires 802.1X authentication. Other devices connect successfully. The phone shows 'Authentication error'. What is the MOST likely cause?

The phone's CA certificate is missing or untrusted.

The phone's Wi-Fi antenna is faulty.

The phone's MAC address is blocked.

A technician is diagnosing a smartphone that overheats quickly during normal use. The device is running many apps in the background. Which diagnostic step should the technician perform FIRST?

Perform a factory reset to clear all background apps.

Remove the phone case to improve heat dissipation.

Check the battery usage statistics to identify apps consuming excessive power.

Replace the battery to rule out a faulty battery.

A technician is replacing a smartphone's screen. The new screen is installed, but the touch function does not work, although the display is fine. What is the MOST likely cause?

The phone's OS needs to be updated.

The screen's backlight is faulty.

The digitizer flex cable is not fully seated or is damaged.

The screen's polarizer is damaged.

CompTIAA+ Core 1

Domain 1Objective 4

Troubleshooting 220-1201 Practice Questions (Page 3)

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 11–15

11foundation · easy
A mobile device shuts down unexpectedly even though the battery indicator shows a high charge level. Which hardware issue is most likely causing this behavior?
Select an answer first
12expert · hard
A technician is using a mobile diagnostic app to troubleshoot a smartphone that has intermittent Wi-Fi disconnects. The app shows the phone's signal strength is -85 dBm. What does this reading indicate?
Select an answer first
13expert · hard
A user's smartphone cannot connect to a corporate Wi-Fi network that requires 802.1X authentication. Other devices connect successfully. The phone shows 'Authentication error'. What is the MOST likely cause?
Select an answer first
14application · medium
A technician is diagnosing a smartphone that overheats quickly during normal use. The device is running many apps in the background. Which diagnostic step should the technician perform FIRST?
Select an answer first
15expert · hard
A technician is replacing a smartphone's screen. The new screen is installed, but the touch function does not work, although the display is fine. What is the MOST likely cause?
Select an answer first

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