The answer is to wait a day or two for background indexing to complete. This is correct because after a major OS update, Android devices re-index all files, media, and app data to optimize search functionality and system performance, a process that is both CPU- and I/O-intensive and can drain the battery for 24 to 48 hours. On the CompTIA A+ Core 2 220-1202 exam, this scenario tests your understanding of post-update system behaviors versus hardware failure or malware, with a common trap being to suggest clearing the cache or factory resetting immediately. Remember that restarting alone does not stop this background task, so the correct fix is patience. Memory tip: “Indexing is taxing—give it a day before you start fixing.”
220-1102 Mobile OS and App Troubleshooting Practice Question
This 220-1202 practice question tests your understanding of mobile os and app troubleshooting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A user complains that their Android phone's battery drains extremely fast after a recent OS update. They have already tried restarting the device. What is the most likely cause and solution?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The device is performing background indexing; wait a day or two.
After a major OS update, Android devices often perform background indexing of files, media, and app data to optimize search and performance. This process is CPU- and I/O-intensive, causing increased battery drain for 24–48 hours. The correct solution is to wait a day or two for indexing to complete, as restarting alone does not stop this background task.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
The update installed a malware app; perform a factory reset.
Why it's wrong here
Malware from an official update is extremely rare; this is an overreaction.
✗
The update reset battery optimization settings; re-enable them.
Why it's wrong here
While possible, this is not the most common cause; the system typically needs time to stabilize.
✓
The device is performing background indexing; wait a day or two.
Why this is correct
Post-update background tasks often cause temporary drain; patience is the recommended first step.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The battery is failing due to the update; replace the battery.
Why it's wrong here
An update cannot physically damage a battery; this is a software issue.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that any post-update battery drain is due to malware or a failing battery, when in fact background system processes like indexing are the most common cause.
Detailed technical explanation
How to think about this question
Android uses the MediaStore and FUSE (Filesystem in Userspace) to index files; after an update, the system triggers a full re-index via the `MediaProvider` and `DownloadManager` services. This can cause sustained CPU usage at 30–50% for hours, especially on devices with large storage. In real-world scenarios, users often mistake this for a rogue app and perform factory resets, which only temporarily resolves the issue because the indexing restarts after the reset.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A practitioner preparing for the 220-1202 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 220-1202 question in full detail.
Mobile OS and App Troubleshooting — This question tests Mobile OS and App Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The device is performing background indexing; wait a day or two. — After a major OS update, Android devices often perform background indexing of files, media, and app data to optimize search and performance. This process is CPU- and I/O-intensive, causing increased battery drain for 24–48 hours. The correct solution is to wait a day or two for indexing to complete, as restarting alone does not stop this background task.
What should I do if I get this 220-1202 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A user complains that their Android phone's battery drains quickly after installing a new weather app. The phone is warm to the touch even when idle. What should you do to resolve this?
medium
A.Replace the battery immediately.
✓ B.Check battery usage in Settings to see which app is consuming power.
C.Perform a factory reset to remove all apps.
D.Update the phone's operating system to the latest version.
Why B: Battery drain and overheating after app installation indicate a misbehaving app. The best first step is to check battery usage statistics to identify the culprit, then force stop or uninstall that app. This is a standard Android troubleshooting procedure.
Variation 2. A user reports that their Android phone's battery drains rapidly after a recent app update. They have already tried restarting the device. Which of the following should a technician recommend FIRST to diagnose the issue?
easy
A.Perform a factory reset.
✓ B.Check battery usage in Settings to identify the app consuming the most power.
C.Replace the battery immediately.
D.Disable all background data.
Why B: Option B is correct because the first step in diagnosing rapid battery drain after an app update is to use the built-in battery usage tool in Android Settings. This tool provides a per-app breakdown of power consumption, allowing the technician to identify which specific app is consuming excessive energy without making invasive changes. Restarting the device already failed to resolve the issue, so checking battery stats is the logical next step before any destructive or restrictive actions.
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Question Discussion
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