220-1101 Mobile Devices Practice Test 6 — 15 Questions

Question 1

A user's smartphone has a cracked screen that is still partially functional, but the touch input does not work in the cracked area. The user wants to back up all data before taking it for repair. Which method would be MOST reliable to back up the data if the screen is unresponsive?

Accepted Answer

Use a cloud backup service that was previously enabled.. Option B is correct because if a cloud backup service (e.g., iCloud, Google Drive, Samsung Cloud) was previously enabled and configured to back up automatically, the user can restore the data after the repair without needing any screen interaction. This method does not require the touchscreen to be functional, as backups occur in the background over Wi-Fi. It is the most reliable approach when the screen is unresponsive and no prior wired connection was established.

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Connect the phone to a computer via USB and use file explorer.

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Use an OTG cable to connect a mouse.

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Use the phone's recovery mode to perform a full backup.

Question 2

A user's smartphone will not charge when connected to the charger. The technician has verified that the charger and cable work with another phone, and the charging port appears clean and free of debris. Which of the following should the technician try FIRST?

Accepted Answer

Use a wireless charger if supported.. Since the charger and cable are verified working and the port is clean, the issue is likely with the phone's charging circuitry. Using a wireless charger (if supported) bypasses the physical charging port entirely, isolating whether the problem is with the port or the phone's internal charging system. This is the quickest and least invasive test before attempting more disruptive steps.

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Replace the battery.

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Perform a hard reset.

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Boot into safe mode.

Question 3

A user reports that their smartphone's touchscreen is unresponsive in a small area near the bottom-left corner after dropping the device. The screen is not cracked, and the display still shows images correctly in that area. The technician has already performed a soft reset and verified that no screen protector is interfering. Which of the following is the most likely cause?

Accepted Answer

A. The digitizer layer is damaged. The digitizer layer is the component responsible for detecting touch input. When a smartphone is dropped, the digitizer can sustain localized damage—such as a cracked or delaminated sensor grid—even if the display (LCD/OLED) remains intact and shows images correctly. The unresponsive area in the bottom-left corner, combined with normal image display, points directly to a damaged digitizer rather than the LCD panel.

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B. The LCD panel is cracked internally

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C. The battery is swollen and pressing against the screen

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D. The screen resolution settings are incorrect

Question 4

A user's smartphone has become intermittent: the screen flickers and sometimes goes completely black for a few seconds before returning to normal. The phone has not been dropped recently and there is no visible damage. The technician has already performed a soft reset and the issue persists. Which of the following is the most likely cause?

Accepted Answer

Loose internal display cable. The intermittent screen flickering and blackouts, without physical damage or drop history, strongly point to a loose internal display cable. A soft reset did not resolve the issue, ruling out temporary software glitches. The display cable connects the screen to the motherboard; if it becomes slightly unseated due to thermal expansion or vibration, it can cause intermittent signal loss, leading to the described symptoms.

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Failing battery

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Corrupted operating system

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Faulty digitizer

Question 5

A user's smartphone with a removable battery begins to randomly shut down and restart. The technician notices that the battery percentage jumps erratically. Which of the following is the most likely cause?

Accepted Answer

The battery is worn out and needs replacement. The erratic battery percentage jumps and random shutdowns are classic symptoms of a worn-out lithium-ion battery that can no longer hold a stable charge. As the battery ages, its internal resistance increases and its voltage sags under load, causing the device's power management IC to misread the remaining capacity and trigger unexpected shutdowns. Replacing the battery restores stable voltage output and accurate fuel gauge reporting.

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The operating system requires an update

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The SIM card is loose

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The screen is malfunctioning

Question 6

A user's smartphone has a cracked screen that is still displaying images, but the touch input is completely unresponsive. The user needs to back up all data (contacts, photos, app data) before sending the phone for repair. Which method is the MOST reliable and complete way to back up the data in this situation?

Accepted Answer

Connect a USB mouse via an OTG cable to control the phone and perform a backup. With a cracked screen that is unresponsive to touch but still displays images, the only way to interact with the phone is through an external input device. Connecting a USB mouse via an On-The-Go (OTG) cable allows the user to navigate the phone's interface and manually initiate a full backup (e.g., to a computer or cloud service) without relying on the broken touchscreen. This method provides complete control over the backup process, ensuring all data types (contacts, photos, app data) can be selected and transferred.

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Use a computer and connect the phone via USB, then use file explorer to copy data

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Press the volume and power buttons to enter recovery mode and perform a backup

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Rely on cloud backup if the phone is configured to auto-backup

Question 7

A user reports that their smartphone is running very slowly and the battery drains significantly faster than usual, even when the screen is off. The technician notices that the phone feels warm to the touch. Which of the following is the MOST likely cause of these symptoms?

Accepted Answer

Too many apps are running in the background.. When a smartphone feels warm, runs slowly, and drains battery quickly even with the screen off, the most likely cause is excessive background app activity. Background apps consume CPU cycles and keep the processor active, generating heat and draining the battery. This is a classic symptom of runaway background processes rather than a hardware failure or simple settings issue.

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The screen brightness is set too high.

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The operating system needs to be updated.

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The battery is failing and needs to be replaced.

Question 8

A user's Android smartphone will not charge when plugged into the wall charger. The technician has already verified the charger and cable work with another phone, cleaned the charging port with compressed air, and performed a soft reset. Which of the following should the technician try NEXT?

Accepted Answer

Check the charging port for compacted debris with a flashlight and non-conductive tool. Since the charger and cable are verified working and a soft reset has been performed, the most likely remaining issue is physical debris deep inside the charging port that compressed air alone could not dislodge. Using a flashlight and a non-conductive tool (e.g., plastic or wooden pick) allows the technician to safely inspect and remove compacted debris without shorting the port's pins, which is a common cause of intermittent or failed charging on Android devices.

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Replace the battery

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Replace the charging port assembly

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Perform a factory reset

Question 9

A user reports that their smartphone is not vibrating when receiving calls or notifications, even though the vibrate settings are enabled in the sound menu. The ringtone and speaker work normally. Which of the following is the MOST likely cause of this issue?

Accepted Answer

The vibration motor is defective or disconnected. The vibration motor is a dedicated hardware component that physically oscillates to create the vibration sensation. If the phone's ringtone and speaker work normally but vibration fails despite the vibrate settings being enabled, the most likely cause is that the vibration motor itself is defective or has become disconnected from the motherboard. Software settings cannot override a failed hardware component.

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Do Not Disturb mode is enabled

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The phone is in silent mode

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A recent software update caused a configuration error

Question 10

A user reports that their smartphone has distorted sound coming from the earpiece speaker during phone calls, but the loudspeaker and headphone jack work normally. The user has already tried turning up the volume and cleaning the earpiece grille. Which of the following is the MOST likely cause?

Accepted Answer

Faulty earpiece speaker. The earpiece speaker is a dedicated hardware component separate from the loudspeaker and audio jack. Since the loudspeaker and headphone jack function normally, the issue is isolated to the earpiece speaker itself, making a faulty earpiece speaker the most likely cause. Cleaning the grille and adjusting volume did not resolve the problem, further supporting a hardware failure rather than a software or connection issue.

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Broken audio jack

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Software audio bug

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SIM card issue

Question 11

A user's smartphone was accidentally dropped into a puddle of water. The user immediately removed the phone from the water and wiped it dry. They are now attempting to power it on, but the phone does not respond. Which of the following should the user do FIRST to maximize the chance of recovery?

Accepted Answer

Place the phone in a bag of uncooked rice for 24-48 hours before trying to power it on. Option A is correct because uncooked rice acts as a desiccant, absorbing residual moisture from the phone's internal components over 24-48 hours. This passive drying process minimizes the risk of short circuits or corrosion when power is applied, which is critical since water can cause conductive paths between circuits even after external wiping.

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Immediately plug the phone into a charger to see if it still works

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Use a hair dryer on high heat to dry the phone quickly

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Press and hold the power button for 10 seconds to force a reset

Question 12

A user's smartphone has a cracked screen. The display still shows images, but the touch input is completely unresponsive. The user needs to back up all data (contacts, photos, app data) before sending the phone for repair. The phone is not rooted, and no prior backup software was configured. Which of the following methods is the MOST reliable and complete way to back up the data in this situation?

Accepted Answer

Use a USB On-The-Go (OTG) adapter to connect a mouse to the phone, navigate to enable USB file transfer, then connect to a computer via USB cable.. Option B is correct because a USB OTG adapter allows connecting a mouse to the smartphone, enabling cursor control to navigate the touch interface. This lets the user access settings to enable USB file transfer mode (MTP), after which a computer can read the phone's storage for a full backup of contacts, photos, and app data. Since the screen is cracked but functional, and the phone is not rooted, this method provides complete control without requiring prior backup software.

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Connect the phone to a computer using a USB cable; the computer should automatically detect it as a mass storage device, allowing file access.

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Remove the SIM card and any microSD card, then connect the phone to a computer via USB to access internal storage directly.

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Put the phone in a bag of rice to dry it out, then connect to a computer via USB, as the moisture may block the touch input.

Question 13

A user accidentally spills coffee over their smartphone. They immediately pick it up and wipe the exterior. The phone is still powered on and functioning, but the touchscreen is not responding correctly in the area where the liquid was spilled. Which of the following should the user do FIRST to prevent further damage?

Accepted Answer

Power off the phone and remove the battery if possible.. Powering off the phone and removing the battery (if possible) immediately stops electrical current from flowing through the device, which prevents short circuits and electrochemical corrosion caused by the conductive and corrosive nature of coffee. This is the first and most critical step to mitigate damage to the motherboard and other internal components.

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Place the phone in a bag of uncooked rice for 24 hours.

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Use a hairdryer on high heat to dry the phone.

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Continue using the phone and hope it dries out naturally.

Question 14

A user's laptop powers on (fans spin, power LED on), but the built-in display remains black. The technician connects an external monitor to the laptop's video port, and the external monitor displays the desktop correctly. Which of the following is the MOST likely cause?

Accepted Answer

The LCD panel or backlight has failed. The laptop powers on (fans spin, power LED on) but the built-in display remains black, while an external monitor connected to the video port works correctly. This indicates that the GPU and video driver are functional, as they are able to drive the external display. The most likely cause is a failure of the LCD panel itself or its backlight (e.g., a faulty LED backlight, inverter, or display cable), since the internal display is the only component not working.

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The laptop's video driver is corrupt

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The RAM is faulty

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The battery is not charging

Question 15

A user accidentally drops their smartphone into a saltwater pool. They retrieve it within seconds and wipe the exterior dry. The phone is still powered on, but the screen is flickering and the touchscreen is unresponsive. Which of the following should the user do FIRST to maximize the chance of successful recovery?

Accepted Answer

Power off the phone immediately. Powering off the phone immediately (B) is the correct first step because saltwater is highly conductive and corrosive. Even after wiping the exterior, residual moisture and salt ions inside the device can cause short circuits and electrochemical corrosion that rapidly damage internal components. Cutting power stops the flow of current through the wet circuits, minimizing the risk of permanent damage and giving the user the best chance of successful recovery through proper drying.

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Place the phone in a bag of uncooked rice to absorb moisture

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Connect the phone to a charger to see if it will respond

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Use a hair dryer on high heat to dry the phone quickly