- A
Use a third-party Task Killer app to automatically close background processes.
Why wrong: Third-party task killers are generally discouraged on modern Android because they can interfere with normal system processes and often don't solve the root cause; the built-in tools are more effective.
- B
Check the Battery Usage menu in Settings to see which app is using the most power.
The Battery Usage menu provides a detailed breakdown of power consumption by app and system services, enabling targeted troubleshooting.
- C
Perform a factory reset from the Recovery Mode menu.
Why wrong: A factory reset is a last-resort measure that erases all data; it is not the first step to diagnose a specific misbehaving app.
- D
Enable Developer Options and increase the background process limit.
Why wrong: Increasing background process limits can actually worsen battery drain and does not help identify the offending app.
Android Battery Usage Tool: Pinpointing Battery Drain
This 220-1202 practice question tests your understanding of mobile os features and tools. 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 reports that their Android phone is running slowly and the battery drains quickly. They have many apps installed. Which built-in Android feature should you use to identify and stop a misbehaving app that is consuming excessive CPU and battery resources?
Quick Answer
The answer is to use the built-in Battery Usage menu in Settings. This tool is correct because it provides a granular breakdown of power consumption by app and system services, directly revealing which misbehaving app is consuming excessive CPU and battery resources. On the CompTIA A+ Core 2 220-1202 exam, this question tests your knowledge of standard Android troubleshooting tools versus third-party or drastic solutions; a common trap is recommending a Task Killer, which Android itself advises against as it can destabilize the OS. Instead, remember that the Battery Usage tool is your first step for pinpointing battery drain without resorting to a factory reset. A simple memory tip: "Battery first, reset last" — always check the built-in power stats before taking more invasive actions.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Check the Battery Usage menu in Settings to see which app is using the most power.
The Battery Usage menu in Android Settings (found under Settings > Battery > Battery Usage) provides a detailed breakdown of power consumption by app and system components. It shows CPU, network, and sensor usage, allowing you to identify an app that is misbehaving by consuming excessive resources. From this menu, you can force stop the app, clear its cache, or uninstall it directly, which is the correct built-in approach for diagnosing and stopping a resource-hungry app without third-party tools or destructive resets.
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.
- ✗
Use a third-party Task Killer app to automatically close background processes.
Why it's wrong here
Third-party task killers are generally discouraged on modern Android because they can interfere with normal system processes and often don't solve the root cause; the built-in tools are more effective.
- ✓
Check the Battery Usage menu in Settings to see which app is using the most power.
Why this is correct
The Battery Usage menu provides a detailed breakdown of power consumption by app and system services, enabling targeted troubleshooting.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Perform a factory reset from the Recovery Mode menu.
Why it's wrong here
A factory reset is a last-resort measure that erases all data; it is not the first step to diagnose a specific misbehaving app.
- ✗
Enable Developer Options and increase the background process limit.
Why it's wrong here
Increasing background process limits can actually worsen battery drain and does not help identify the offending app.
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that third-party task killers or developer options are appropriate troubleshooting tools, when in fact Android's built-in Battery Usage menu is the correct, non-destructive method to identify resource-hungry apps.
Detailed technical explanation
How to think about this question
Android's Battery Usage statistics are derived from the kernel's power profile, which assigns a milliampere-hour (mAh) cost to each hardware component (CPU, Wi-Fi, cellular radio, etc.) and tracks per-app usage via the ActivityManager and PowerManager services. The system calculates battery drain by multiplying the time an app holds a wakelock or uses a component by the component's current draw, providing a normalized percentage. In real-world scenarios, an app like a poorly coded social media client might keep the GPS or CPU awake for extended periods, which would appear as a high percentage in Battery Usage, allowing you to force stop it without affecting other apps.
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.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this 220-1202 question test?
Mobile OS Features and Tools — This question tests Mobile OS Features and Tools — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Check the Battery Usage menu in Settings to see which app is using the most power. — The Battery Usage menu in Android Settings (found under Settings > Battery > Battery Usage) provides a detailed breakdown of power consumption by app and system components. It shows CPU, network, and sensor usage, allowing you to identify an app that is misbehaving by consuming excessive resources. From this menu, you can force stop the app, clear its cache, or uninstall it directly, which is the correct built-in approach for diagnosing and stopping a resource-hungry app without third-party tools or destructive resets.
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.
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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Last reviewed: Jul 4, 2026
This 220-1202 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 220-1202 exam.
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