Mobile Devices practice questions

A technician is servicing a smartphone with a non-functional earpiece speaker during calls, but the loudspeaker works fine. After testing, the earpiece speaker itself is determined to be good. Which component is most likely faulty?

Trap 1: The charging port flex cable.

The charging port flex typically handles power and data, not audio routing.

Trap 2: The SIM card slot.

SIM slot only handles network identification, not audio.

Trap 3: The battery connector.

Battery connector issues would cause power problems, not selective audio failure.

A
The charging port flex cable.
Why wrong: The charging port flex typically handles power and data, not audio routing.
B
The mainboard audio IC (codec).
The audio IC controls which speaker receives sound; a fault here can disable the earpiece while leaving the loudspeaker functional.
C
The SIM card slot.
Why wrong: SIM slot only handles network identification, not audio.
D
The battery connector.
Why wrong: Battery connector issues would cause power problems, not selective audio failure.

Question 2easymultiple choice

A user is setting up a new tablet and wants to share its internet connection with a laptop that has no cellular capability. The tablet has a cellular data plan. Which configuration should the user enable on the tablet?

Trap 1: Enable Bluetooth pairing only.

Bluetooth pairing alone does not share internet; the user must also enable Bluetooth tethering on the tablet.

Trap 2: Enable airplane mode.

Airplane mode disables all wireless radios, including cellular, so it would prevent internet sharing.

Trap 3: Enable NFC.

NFC is for close-range data exchange, not for sharing an internet connection.

A
Enable Bluetooth pairing only.
Why wrong: Bluetooth pairing alone does not share internet; the user must also enable Bluetooth tethering on the tablet.
B
Enable Wi-Fi hotspot.
A Wi-Fi hotspot (tethering) creates a local Wi-Fi network that the laptop can join to use the tablet's cellular data connection.
C
Enable airplane mode.
Why wrong: Airplane mode disables all wireless radios, including cellular, so it would prevent internet sharing.
D
Enable NFC.
Why wrong: NFC is for close-range data exchange, not for sharing an internet connection.

Question 3mediummultiple choice

A technician is deploying a fleet of tablets for field workers. The tablets need to connect to a cellular network for data, but the company wants to minimize data usage. Which setting should the technician configure on each tablet?

Trap 1: Disable Wi-Fi.

Disabling Wi-Fi forces the tablet to use cellular data for all connections, which would increase data usage, not decrease it.

Trap 2: Enable airplane mode.

Airplane mode disables all wireless connections, including cellular, preventing any data usage but also preventing the tablets from working as intended.

Trap 3: Set the preferred network type to 5G.

5G can be faster but does not inherently reduce data usage; it may even encourage more data consumption due to higher speeds.

A
Enable data saver mode.
Data saver mode restricts background data usage and can also limit foreground data for some apps, helping to minimize overall data consumption.
B
Disable Wi-Fi.
Why wrong: Disabling Wi-Fi forces the tablet to use cellular data for all connections, which would increase data usage, not decrease it.
C
Enable airplane mode.
Why wrong: Airplane mode disables all wireless connections, including cellular, preventing any data usage but also preventing the tablets from working as intended.
D
Set the preferred network type to 5G.
Why wrong: 5G can be faster but does not inherently reduce data usage; it may even encourage more data consumption due to higher speeds.

Question 4easymultiple choice

A user reports that their Android tablet frequently crashes when using a specific note-taking app, but other apps work fine. They have already cleared the app cache and data. What should you do next to resolve the issue?

Trap 1: Perform a factory reset on the tablet.

A factory reset is too drastic and unnecessary for a single app issue; it would erase all user data.

Trap 2: Disable the tablet's antivirus software.

Antivirus software rarely causes crashes in a single app, and disabling it is not a standard troubleshooting step for app crashes.

Trap 3: Replace the tablet's battery.

A failing battery might cause random shutdowns, but not crashes limited to one specific app.

A
Perform a factory reset on the tablet.
Why wrong: A factory reset is too drastic and unnecessary for a single app issue; it would erase all user data.
B
Uninstall and reinstall the note-taking app.
Reinstalling the app ensures the latest version is installed and can fix corrupted app files or compatibility issues.
C
Disable the tablet's antivirus software.
Why wrong: Antivirus software rarely causes crashes in a single app, and disabling it is not a standard troubleshooting step for app crashes.
D
Replace the tablet's battery.
Why wrong: A failing battery might cause random shutdowns, but not crashes limited to one specific app.

Question 5mediummultiple choice

A technician is deploying several Android tablets for use as point-of-sale (POS) terminals. The tablets must run a custom POS app in kiosk mode, preventing users from accessing other apps or settings. Which configuration method should the technician use?

Trap 1: Enable Developer Options and set the app as the default launcher.

While this might work temporarily, it is not a secure or managed solution and can be easily bypassed by the user.

Trap 2: Install a third-party launcher and hide all other apps.

Hiding apps does not prevent access to settings or other functions, and users can still access the app drawer.

Trap 3: Root the tablets and modify the system partition to block other…

Rooting violates warranty and security policies, and is not a standard or supported method for enterprise deployment.

A
Enable Developer Options and set the app as the default launcher.
Why wrong: While this might work temporarily, it is not a secure or managed solution and can be easily bypassed by the user.
B
Install a third-party launcher and hide all other apps.
Why wrong: Hiding apps does not prevent access to settings or other functions, and users can still access the app drawer.
C
Use a Mobile Device Management (MDM) solution to configure kiosk mode.
MDM solutions provide enterprise-grade kiosk mode that locks the device to a single app and disables navigation keys, ensuring security and manageability.
D
Root the tablets and modify the system partition to block other apps.
Why wrong: Rooting violates warranty and security policies, and is not a standard or supported method for enterprise deployment.

Read the full VPN explanation →

Question 6mediummultiple choice

A technician is configuring a company-issued Android phone for a remote employee. The employee needs to access corporate email via the Gmail app and use a VPN for secure connections. After setup, the user cannot send emails from the Gmail app, but can receive them. What should the technician check first?

Trap 1: Verify that the VPN is connected and routing traffic correctly.

While VPN issues could affect email, the fact that receiving works suggests the VPN is functional for at least some traffic.

Trap 2: Ensure the device has enough free storage space.

Low storage might cause app crashes or slow performance, but not a specific inability to send emails while receiving works.

Trap 3: Reinstall the Gmail app from the Play Store.

Reinstalling is unnecessary; the issue is likely a configuration error, not app corruption.

A
Verify that the VPN is connected and routing traffic correctly.
Why wrong: While VPN issues could affect email, the fact that receiving works suggests the VPN is functional for at least some traffic.
B
Check the outgoing mail server (SMTP) settings in the Gmail app.
Outgoing mail requires proper SMTP server address, port, and authentication; misconfiguration here prevents sending but not receiving.
C
Ensure the device has enough free storage space.
Why wrong: Low storage might cause app crashes or slow performance, but not a specific inability to send emails while receiving works.
D
Reinstall the Gmail app from the Play Store.
Why wrong: Reinstalling is unnecessary; the issue is likely a configuration error, not app corruption.

Question 7mediummultiple choice

A technician is setting up a Windows 10 tablet for a field worker who needs to use a legacy line-of-business (LOB) app that only runs in 32-bit mode. The tablet has a 64-bit processor and Windows 10 Pro. How should the technician ensure the app runs correctly?

Trap 1: Install the app in a virtual machine running 32-bit Windows.

This is overly complex and unnecessary; 32-bit apps run natively on 64-bit Windows via WOW64.

Trap 2: Enable Windows 8 compatibility mode for the app.

Compatibility mode is for older OS versions, not for architecture differences; the app will run without it.

Trap 3: Download and install the 64-bit version of the app from the vendor.

The scenario states the app is only available in 32-bit; a 64-bit version does not exist.

A
Install the app in a virtual machine running 32-bit Windows.
Why wrong: This is overly complex and unnecessary; 32-bit apps run natively on 64-bit Windows via WOW64.
B
Enable Windows 8 compatibility mode for the app.
Why wrong: Compatibility mode is for older OS versions, not for architecture differences; the app will run without it.
C
Install the app normally; 32-bit apps are supported on 64-bit Windows.
Windows 64-bit includes WOW64, which emulates a 32-bit environment, allowing the app to install and run without issues.
D
Download and install the 64-bit version of the app from the vendor.
Why wrong: The scenario states the app is only available in 32-bit; a 64-bit version does not exist.

Read the full wireless explanation →

Question 8mediummultiple choice

A company deploys a new 802.11ac access point in a warehouse. After installation, workers report that their handheld scanners frequently disconnect when moving between aisles. The AP is mounted on a high ceiling. Which configuration change would most likely improve connectivity?

Trap 1: Increase the AP's channel width to 80 MHz.

Wider channels increase throughput but reduce range and are more susceptible to interference, worsening the issue.

Trap 2: Enable WPA3 encryption on the network.

Encryption does not affect range or signal penetration; it only secures data.

Trap 3: Reduce the AP's transmit power to avoid interference.

Lowering power would reduce range, making disconnects more likely.

A
Change the AP to use only 2.4 GHz band.
2.4 GHz has better range and can penetrate obstacles like warehouse racks more effectively, reducing disconnects.
B
Increase the AP's channel width to 80 MHz.
Why wrong: Wider channels increase throughput but reduce range and are more susceptible to interference, worsening the issue.
C
Enable WPA3 encryption on the network.
Why wrong: Encryption does not affect range or signal penetration; it only secures data.
D
Reduce the AP's transmit power to avoid interference.
Why wrong: Lowering power would reduce range, making disconnects more likely.