CompTIA A+ Core 1 Practice Questions: Mobile Devices/Troubleshooting

7 free, exam-style CompTIA A+ Core 1 (220-1201) practice questions covering Mobile Devices/Troubleshooting, each with the correct answer and an explanation. Start a timed exam below, or scroll on to read through the questions.

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Mobile Devices/Troubleshooting practice questions

Answers and explanations are shown. Take the timed exam above to test yourself first.

Q1. A user reports that their mobile phone's battery drains much faster than usual, even with light usage. Which of the following is a common cause for this issue?

  • A.Outdated Wi-Fi password
  • B.A rogue application consuming excessive resources✓ Correct
  • C.Insufficient storage space
  • D.Screen brightness set too low
Explanation: A poorly optimized or malfunctioning application running in the background can consume significant CPU resources and network data, leading to rapid battery drain. Checking battery usage by app in settings can help identify such apps. Learn more.

Q2. A user reports that the GPS on their smartphone is frequently inaccurate or unable to get a lock. Which of the following is LEAST likely to be a cause?

  • A.Being indoors or in an urban canyon
  • B. Airplane mode being enabled
  • C.A nearly full storage device on the phone✓ Correct
  • D.Outdated GPS assistance data (A-GPS)
Explanation: While a nearly full storage device can cause general performance issues, it's least likely to directly impact GPS accuracy. Being indoors, having airplane mode on (which disables radios including GPS), or outdated A-GPS data are more common culprits. Learn more.

Q3. After connecting a new laptop dock, external displays are not detected. What should be checked first?

  • A.Dock firmware, drivers, and supported display mode✓ Correct
  • B.Toner fuser temperature
  • C.DHCP lease duration only
  • D.Printer paper size
Explanation: Modern docks often require compatible firmware, drivers, and supported display modes to drive external monitors. Learn more.

Q4. A user reports a laptop battery drains rapidly after many charge cycles. What is the most likely explanation?

  • A.Battery capacity has degraded with age✓ Correct
  • B.The DNS server is slow
  • C.The touchpad is disabled
  • D.The printer driver is wrong
Explanation: Rechargeable batteries lose capacity over time and may need replacement after many cycles. Learn more.

Q5. A user reports their laptop battery drains very quickly even when idle. Which troubleshooting step should be performed first?

  • A.Replace the motherboard
  • B.Check for background apps and processes consuming resources✓ Correct
  • C.Reinstall the operating system
  • D.Replace the screen
Explanation: Excessive battery drain is most commonly caused by background apps, high screen brightness, or misbehaving processes; checking resource usage is a quick, non-destructive first step before considering hardware issues. Learn more.

Q6. A user reports that their mobile phone's battery drains much faster than usual, even with light usage, and the device sometimes feels warm. Which of the following is a common cause for this issue that a technician should investigate?

  • A.An outdated Wi-Fi password causing connection attempts
  • B.A rogue or poorly optimized application consuming excessive CPU resources in the background✓ Correct
  • C.Insufficient internal storage space on the device
  • D.The screen brightness being set too low, confusing the power management
Explanation: A misbehaving application (rogue app or even a legitimate app with a bug) can get stuck in a loop or continuously use CPU, GPS, or network resources in the background. This leads to excessive battery drain and can cause the device to heat up. Checking battery usage by app statistics can help identify such culprits. Learn more.

Q7. A user cannot install an application on their Android device because it says there is insufficient storage, even though storage appears available. What should be checked first?

  • A.Cellular signal strength
  • B.Available space in internal app storage vs SD card✓ Correct
  • C.Screen resolution settings
  • D.Bluetooth pairing
Explanation: Some Android devices report combined storage but restrict certain app installations to internal storage only; checking the specific internal storage partition often reveals the real constraint. Learn more.

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