220-1101 Mobile Devices Practice Question
A user reports that their Android smartphone's battery drains very quickly. The technician checks the battery stats and sees that the screen brightness is set to maximum and the battery health is reported as 'Good'. Which of the following settings should the technician suggest to MOST improve battery life?
⚠ Common exam trap
CompTIA often tests the trap that candidates confuse 'battery health' (capacity degradation) with 'battery drain' (power consumption), leading them to overlook the obvious fix of reducing screen brightness when the stats clearly show it is set to maximum.
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
✓
Reduce the screen brightness.
The screen is the largest power consumer on a smartphone, and maximum brightness significantly increases battery drain. Since the battery health is already 'Good', reducing screen brightness directly addresses the primary cause of rapid discharge without disabling necessary functions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable airplane mode.
Why it's wrong here
Airplane mode disables all wireless radios—cellular, Wi-Fi, Bluetooth, and GPS—which stops the power draw and periodic network scanning associated with those modules. However, this also disables calls, texts, and data, making the phone practically unusable for normal communication or productivity. Moreover, airplane mode does nothing about the screen, which is the dominant drain if brightness is high; so while it saves some power, it is not a targeted or practical fix for the stated problem.
When this WOULD be correct
A user reports rapid battery drain while in an area with very poor cellular signal, and the technician sees that the phone is constantly searching for a network. In this scenario, enabling airplane mode would prevent the constant searching and most improve battery life.
- ✓
Reduce the screen brightness.
Why this is correct
The display panel—especially on AMOLED or high-resolution LCD screens—is the largest power consumer in a smartphone, and its draw scales roughly linearly with luminance. Reducing brightness from 100% to 50% can cut display power by nearly half, directly lowering instantaneous wattage. On OLED panels, brighter pixels require more current, so lowering brightness reduces per-pixel power draw and extends the time until the next charge.
- ✗
Disable all background processes.
Why it's wrong here
Disabling all background processes kills essential services like push email, messaging notifications, and system-level sync, which degrades the user experience significantly. Modern Android uses Doze mode and App Standby to intelligently throttle background activity without user intervention, so a blanket disable is unnecessary. Most importantly, the screen's power consumption—especially at high brightness—is several times larger than the aggregate CPU time used by background apps, so this action would not resolve the primary cause of rapid drain.
When this WOULD be correct
A user reports that an Android phone's battery drains quickly even when the screen is off, and battery stats show an app consuming excessive CPU in the background. In that case, disabling or force-stopping that specific background process would be the best solution.
- ✗
Remove the phone's case.
Why it's wrong here
Removing the case does not lower the power consumed by the screen, processor, or wireless radios, so it cannot fix the rapid battery drain itself. While a thick or insulating case may raise internal temperatures and trigger thermal throttling under heavy load, normal use would not see a meaningful change in battery life. In fact, a case's insulation could slightly raise the ambient temperature around the battery, but the primary drain is from active components, not the case.
When this WOULD be correct
A user reports that their phone overheats and battery drains quickly. The technician finds the phone is in a thick insulating case. In this scenario, removing the case would improve heat dissipation and potentially reduce battery drain caused by thermal throttling.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 220-1101 exam frequently reuses these exact scenarios with slightly different constraints.
✓Reduce the screen brightness.Correct answer▾
Why this is correct
The display panel—especially on AMOLED or high-resolution LCD screens—is the largest power consumer in a smartphone, and its draw scales roughly linearly with luminance. Reducing brightness from 100% to 50% can cut display power by nearly half, directly lowering instantaneous wattage. On OLED panels, brighter pixels require more current, so lowering brightness reduces per-pixel power draw and extends the time until the next charge.
✗Enable airplane mode.Wrong answer — click to see why▾
Why this is wrong here
Enabling airplane mode disables cellular, Wi-Fi, and Bluetooth radios, which can save battery, but the question states the screen brightness is set to maximum and battery health is good. The most impactful change is reducing screen brightness, not disabling radios.
★ When this WOULD be the correct answer
A user reports rapid battery drain while in an area with very poor cellular signal, and the technician sees that the phone is constantly searching for a network. In this scenario, enabling airplane mode would prevent the constant searching and most improve battery life.
Why candidates choose this
Candidates may think that disabling all wireless communication via airplane mode is a universal battery-saving measure, overlooking that the specific problem here is excessive screen brightness.
✗Disable all background processes.Wrong answer — click to see why▾
Why this is wrong here
Disabling all background processes is too aggressive and may prevent essential system functions and notifications, while the question specifically identifies screen brightness as the primary drain. It is not the most targeted fix.
★ When this WOULD be the correct answer
A user reports that an Android phone's battery drains quickly even when the screen is off, and battery stats show an app consuming excessive CPU in the background. In that case, disabling or force-stopping that specific background process would be the best solution.
Why candidates choose this
Candidates know that background processes consume battery, so they assume disabling all of them will save power, overlooking that this can break core functionality and that the question already points to screen brightness as the main issue.
✗Remove the phone's case.Wrong answer — click to see why▾
Why this is wrong here
Removing the phone's case does not directly address the primary cause of battery drain (maximum screen brightness). Cases can affect heat dissipation but not battery life significantly in this context.
★ When this WOULD be the correct answer
A user reports that their phone overheats and battery drains quickly. The technician finds the phone is in a thick insulating case. In this scenario, removing the case would improve heat dissipation and potentially reduce battery drain caused by thermal throttling.
Why candidates choose this
Candidates may think cases trap heat, causing the battery to work harder and drain faster, but this is a secondary effect and not the main issue when screen brightness is already identified as the culprit.
Analysis generated from the official 220-1101blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
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About these practice questions
One of 896 original 220-1101 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
1 more way this is tested on 220-1101
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 reports that their Android smartphone's battery drains significantly faster after a recent app update. The phone has the latest OS updates installed. The user has already restarted the phone and closed all running apps. Which of the following should the technician advise the user to check FIRST?
easy- A.The battery health using a third-party app
- B.The screen brightness and timeout settings
- ✓ C.The battery usage statistics in Settings to identify the app consuming power
- D.The NFC settings to ensure it is disabled
Why C: The most direct and efficient first step is to check the battery usage statistics built into Android Settings. This feature provides a per-app breakdown of power consumption since the last full charge, allowing the technician to identify if the recently updated app is responsible for the abnormal drain. Restarting and closing apps already ruled out transient issues, so examining system-level battery data is the logical next step before adjusting settings or using third-party tools.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 220-1101 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 220-1101 exam.