220-1101 Mobile Devices Practice Test 2 — 15 Questions

Question 1

A user drops their smartphone onto a concrete floor. After the fall, the screen displays images and colors correctly, but the touch input does not respond at all. The user has rebooted the phone and wiped the screen clean. Which of the following hardware components is MOST likely damaged?

Choose an answer to begin — your selection is scored in the full session.

Accepted Answer

B. The digitizer is the layer of the touchscreen that detects touch input. Since the display (LCD/OLED) still shows images and colors correctly, the digitizer is the most likely component damaged from the drop, as it is a separate, fragile layer bonded to the glass.

Answer

A

Answer

C

Answer

D

Question 2

A user reports that their Android smartphone's battery drains extremely quickly, and the phone frequently feels warm even when not in use. The technician checks the battery health and it shows 'Good'. The technician notices that the phone's GPS icon appears intermittently in the status bar even when location services are turned off in the settings. Which of the following is the MOST likely cause?

Accepted Answer

The phone's operating system has a bug that prevents the GPS from turning off.. When the location services toggle is disabled in Android, the operating system prevents all apps from accessing GPS hardware. The Fused Location Provider API respects this master switch, so a third-party app cannot cause the GPS radio to remain active while location services are turned off. The intermittent GPS icon combined with rapid battery drain and heat is most likely caused by an operating-system bug that fails to fully power down the GPS module when location services are disabled, leaving the radio active.

Answer

A malfunctioning battery management IC is overcharging the battery.

Answer

A third-party app is requesting location data and keeping the GPS radio active.

Answer

The GPS antenna is shorted, causing constant power draw.

Question 3

A technician is setting up a new Android tablet for a user who wants to connect a Bluetooth keyboard. The keyboard is turned on and in pairing mode. The tablet's Bluetooth is enabled, but the keyboard does not appear in the available devices list. Which of the following should the technician check FIRST?

Accepted Answer

Ensure the keyboard is within 30 feet (10 meters) of the tablet.. The keyboard is explicitly turned on and in pairing mode, so its battery is not depleted. The most logical first step is to verify the keyboard is within Bluetooth range (30 feet/10 meters). Distance is a common reason a discoverable device does not appear, and it is a simple check before moving to more complex troubleshooting like adapter faults or restarts.

Answer

Verify the keyboard's battery is not depleted.

Answer

Check if the tablet's Bluetooth adapter is faulty by testing with another Bluetooth device.

Answer

Restart the tablet to refresh the Bluetooth service.

Question 4

A user's smartphone screen does not auto-rotate when the device is turned sideways. The technician checks the 'Auto-rotate' setting and finds it is enabled. Which of the following components is MOST likely malfunctioning?

Accepted Answer

Accelerometer. The auto-rotate feature uses the accelerometer to sense the device's orientation relative to gravity. The gyroscope measures angular rotation rate and does not independently detect orientation relative to gravity. A malfunctioning accelerometer would be the most likely cause when auto-rotate is enabled but the screen does not rotate.

Answer

Proximity sensor

Answer

Ambient light sensor

Answer

Gyroscope

Question 5

A technician is configuring a corporate-issued iPad for a sales representative who travels internationally. The representative needs continuous cellular data coverage in Europe and Asia without swapping cards, and the device must remain managed by the company's MDM. Which of the following should the technician configure on the iPad?

Accepted Answer

Enable an eSIM profile provisioned through the carrier's international roaming plan.. The eSIM approach satisfies both stated constraints: coverage across Europe and Asia through a downloaded carrier profile, and continued corporate management because the profile stays associated with the company's account. Physical SIM swapping, Wi-Fi calling, and Bluetooth tethering each fail one of the requirements, either by interrupting coverage, depending on external networks, or removing the iPad's own cellular identity.

Answer

Install a physical nano-SIM from a local carrier in each country visited.

Answer

Pair the iPad over Bluetooth with a dedicated international mobile hotspot.

Answer

Configure the iPad to use Wi-Fi calling exclusively while traveling abroad.

Question 6

A user reports that the touchscreen on their smartphone is unresponsive in the bottom-left corner but works everywhere else. Which component is most likely failing?

Accepted Answer

Digitizer failure. The touchscreen's digitizer is the layer responsible for detecting touch input. When a specific region of the screen becomes unresponsive while the display itself remains functional, it indicates a localized failure of the digitizer's grid or controller, not the LCD panel.

Answer

Dead pixels

Answer

LCD backlight issue

Answer

Pending OS update

Question 7

A user reports that their smartphone battery drains significantly faster after a recent OS update. Which of the following should the technician do FIRST to address this issue?

Accepted Answer

Check the battery usage statistics in the settings menu. The first step in troubleshooting battery drain after an OS update is to check the battery usage statistics in the settings menu. This allows the technician to identify which apps or services are consuming excessive power, often due to background processes or misconfigured settings introduced by the update. Replacing hardware or performing a full OS reinstall without first diagnosing the cause is premature and may not resolve the issue.

Answer

Replace the battery with a new one

Answer

Perform a factory reset and restore from backup

Answer

Reinstall the operating system using the latest firmware

Question 8

A user's smartphone running Android is unable to connect to any Wi-Fi network. The Wi-Fi toggle is grayed out and cannot be turned on. The technician has tried a soft reset and checked that Airplane Mode is off. Which of the following is the most likely cause?

Accepted Answer

Faulty Wi-Fi antenna or module. When the Wi-Fi toggle is grayed out and cannot be enabled, even after a soft reset and confirming Airplane Mode is off, it typically indicates a hardware-level failure. The most common cause is a faulty Wi-Fi antenna or module, as the operating system detects the hardware is not responding and disables the toggle to prevent user attempts. Software issues like corrupted settings or incorrect date/time would not prevent the toggle from being physically movable.

Answer

Corrupted network configuration

Answer

Incorrect date and time

Answer

Disabled Wi-Fi adapter in BIOS

Question 9

A user's iPhone will not charge even though the screen is cracked but still displays properly and responds to touch. The technician has cleaned the Lightning port and verified the charging cable and power adapter work with another device. Which component most likely needs replacement?

Accepted Answer

Replace the charging port flex cable. The iPhone charges through the Lightning port, which is connected to the logic board via the charging port flex cable. Since the screen is cracked but still displays and responds to touch, the LCD and digitizer are functional. The technician has already ruled out the cable and power adapter, so the most likely failure is the charging port flex cable, which can be damaged by debris, corrosion, or physical stress from the cracked screen.

Answer

Replace the LCD assembly

Answer

Replace the digitizer

Answer

Replace the battery

Question 10

A user reports that their laptop's touchpad is not working. The technician checks Device Manager and sees the touchpad is not listed. The function key (Fn + F7) that enables/disables the touchpad does not seem to respond. The technician has rebooted the laptop. Which of the following should the technician try NEXT?

Accepted Answer

Check BIOS settings for touchpad enable/disable. The touchpad not appearing in Device Manager and the Fn key not responding suggests the device is disabled at a lower level than the OS, such as in the BIOS/UEFI firmware. Checking BIOS settings is the correct next step because many laptops have a hardware-level enable/disable toggle for the touchpad that overrides OS and driver settings. This is a standard troubleshooting step before attempting driver updates or hardware replacement.

Answer

Update the touchpad driver via Windows Update

Answer

Replace the touchpad hardware

Answer

Run the System File Checker (sfc /scannow)

Question 11

A user's Android smartphone screen is flickering intermittently and occasionally goes black for a few seconds before returning. The phone has not been dropped or exposed to moisture. The technician has performed a factory reset, but the issue persists. Which component is the MOST likely cause of the problem?

Accepted Answer

Display assembly. The display assembly includes both the LCD panel and the digitizer. Since the issue persists after a factory reset, it is hardware-related. Intermittent flickering and blackouts without physical damage or moisture point to a failing LCD panel or loose internal connection within the display assembly, not the digitizer (which handles touch input only).

Answer

Digitizer

Answer

Battery

Answer

Motherboard

Question 12

A user's smartphone will not charge when plugged into a wall charger. The technician tests the charger with another phone and it works correctly. The technician then inspects the charging port on the smartphone and notices debris inside. Which of the following is the BEST first step to resolve the issue?

Accepted Answer

Clean the charging port with a toothpick. The technician has already verified that the charger works with another phone, isolating the issue to the smartphone itself. Inspecting the charging port revealed debris, which is a common cause of poor electrical contact. Cleaning the port with a non-conductive, non-metallic tool like a toothpick is the safest and most effective first step to restore connectivity without damaging the port's pins or internal components.

Answer

Replace the smartphone battery

Answer

Replace the charging port assembly

Answer

Perform a factory reset on the smartphone

Question 13

A user's Android smartphone is experiencing intermittent touchscreen unresponsiveness, especially in the bottom corners. The screen has no visible cracks or damage. Which of the following troubleshooting steps should the technician perform FIRST?

Accepted Answer

Remove the screen protector and clean the screen. Intermittent touchscreen unresponsiveness, especially in the bottom corners, is often caused by a screen protector that is lifting, trapping debris, or creating air gaps that interfere with the capacitive touch layer. The first step should be to remove the screen protector and clean the screen with a microfiber cloth, as this is the least invasive and most likely fix for the described symptoms.

Answer

Perform a factory reset

Answer

Replace the touchscreen digitizer

Answer

Update the device firmware

Question 14

A user reports that their mobile phone's battery drains significantly faster than normal. The technician checks the battery usage statistics and finds that a specific social media app is consuming an unusually high percentage of battery. Which of the following is the FIRST step the technician should take to resolve the issue?

Accepted Answer

Force stop the application. Force stopping the application immediately halts the misbehaving process and its background services, which is the fastest way to stop excessive battery drain without affecting other system components. This is the first troubleshooting step because it isolates the issue to the app itself, allowing the technician to verify if the app is the root cause before taking more drastic measures.

Answer

Replace the battery

Answer

Recalibrate the battery

Answer

Perform a factory reset

Question 15

After a user updates their iPhone to the latest iOS version, the device can no longer connect to the cellular network. The SIM card is recognized, Wi-Fi works, and the phone can make calls over Wi-Fi (VoWiFi). The technician performed a network settings reset and a full restore from a backup, but the issue persists. Which of the following is the MOST likely cause?

Accepted Answer

The iPhone's baseband hardware has failed. The symptoms—SIM recognized, Wi-Fi and VoWiFi working, but no cellular connectivity after an iOS update—point to a hardware-level baseband failure. The baseband processor handles cellular radio functions; an update cannot corrupt hardware, but it can expose a pre-existing latent hardware fault. Since a network settings reset and full restore from backup did not resolve the issue, the problem is not software or firmware, leaving physical baseband hardware failure as the most likely cause.

Answer

The SIM card is damaged or locked to a different carrier

Answer

The iOS baseband firmware is corrupted

Answer

The iOS update introduced a compatibility issue with the carrier