Mobile Devices practice questions

Answer: A) A USB-C multi-format flash media reader

An external USB card reader adds the missing slot, and Windows mounts the SD card as USB mass storage so the files can be copied directly. M.2 enclosures, network adapters, and video adapters can't read SD cards.

• ACorrect. An external USB card reader gives the laptop a slot for the card. Windows treats a USB-connected SD reader as a USB mass storage device (usbstor.sys and disk.sys), so the card shows up as a drive and the photos can be copied directly.
• BIncorrect. An M.2 enclosure holds an M.2 solid-state drive module so it can be used as external storage. It has no slot that accepts an SD card.
• CIncorrect. This adapter adds a wired network port. It can't read an SD card inserted into anything.
• DIncorrect. This adapter sends the laptop's display to an external monitor. It carries video out and has no storage-reading capability.

Answer: A) Mobile device management (MDM)

MDM manages the whole enrolled device, so IT can enforce policies such as a screen lock and fully wipe a lost phone. MAM only protects work apps and their data.

• AWith MDM, the device is enrolled and IT manages the whole device, including its settings and security policies such as a screen-lock requirement. IT can also wipe the device if it's lost or stolen.
• BMAM manages only work apps and the data inside them, not the rest of the device. Its wipe removes only organization data, so it can't erase the whole phone or enforce a device-wide screen lock.
• CA VPN client creates an encrypted tunnel for network traffic. It can't erase a device or enforce device policies such as a screen lock.
• DSSO lets users sign in once and reach many resources. It handles authentication, not device policies or remote wipes.

Answer: A) Free up space by removing unused apps and unneeded files

An update that keeps stopping before the download finishes on a nearly full device points to insufficient storage. Free up space first by removing unused apps and files, then retry the update.

• ACorrect. When an update stops before it finishes downloading, the usual cause is not enough free space on the OS drive to store it. Microsoft's guidance is to check free space and then uninstall unused apps, delete or archive unneeded files, or move files elsewhere before retrying the update.
• BIncorrect. A factory reset is a drastic, data-destroying step. It should come only after simpler fixes have failed, and clearing space addresses the actual cause first.
• CIncorrect. Pausing updates only postpones the problem and leaves the device without security fixes. The next update will fail the same way until space is freed.
• DIncorrect. Nothing here points to a battery or power fault. The symptom (the download stops while storage is nearly full) points to insufficient disk space.

Answer: A) The APN (Access Point Name) profile for the carrier

Voice and SMS work, the account and coverage are confirmed, and only cellular data fails. That pattern points to an incorrect or missing APN profile, which defines how the device connects to the carrier's data network.

• AThe APN tells the device how to reach the carrier's data gateway: the gateway name, authentication, and IP type. If the APN is missing or wrong, cellular data fails even though voice and SMS work, and the account and signal are fine.
• BWi-Fi calling only decides whether voice calls can go over a Wi-Fi network. It doesn't control whether the device can set up a cellular data session.
• CHotspot settings control sharing the phone's connection with other devices. They don't affect whether the phone itself can get cellular data.
• DA proxy configured on a Wi-Fi network applies only to that Wi-Fi connection, and browsing over Wi-Fi already works. It has no effect on the cellular data path.

Answer: A) NFC

• ANear Field Communication operates over just a few centimeters, exactly the range needed for tap-to-pay transactions and pairing by proximity.
• BBluetooth is used for pairing accessories like headphones and keyboards over several meters; it's not the technology behind tap-to-pay.
• CIR requires direct line of sight and is mainly used for remote-control functions, not contactless payment.
• DGPS provides location data from satellites; it has no role in short-range payment communication.

Answer: A) Replace the hinge assembly along with the cracked bezel or chassis piece around the mount

A loose hinge with a cracked mount is a structural failure that gets worse with use. The correct repair is to replace the hinge assembly and the damaged chassis or bezel piece, not to apply a quick fix or replace an unrelated part.

• ACorrect. The crack shows the mount can no longer hold the hinge securely, and the stress of opening and closing will keep making it worse. Replacing the hinge and the damaged housing piece restores the structural support.
• BIncorrect. Screws threaded into cracked plastic cannot hold tension, so the hinge will soon loosen again and the crack will spread. A crack at a load-bearing mount is structural damage, not cosmetic damage.
• CIncorrect. Glue may hide the crack for a short time, but it does not restore the strength the mount needs. The hinge stays loose, and the stress will reopen the crack.
• DIncorrect. Display wobble here comes from the loose hinge and the cracked mount. The LCD panel is unrelated, so replacing it would not stop the wobble.

Answer: A) A VPN client app and profile that connects the phone to the company's VPN server

A mobile VPN client and profile create an encrypted connection between the phone and the corporate network, so traffic stays protected over any network. Wi-Fi encryption, proxies and tethering don't provide end-to-end protection.

• ACorrect. A VPN client and its profile set up an encrypted connection from the phone to the organization's VPN server. This protects corporate traffic over any underlying network, including untrusted public Wi-Fi and cellular. MDM tools such as Intune can deploy the VPN app and profile, either device-wide or per app.
• BIncorrect. WPA3 encrypts only the wireless link between the phone and that one access point. It does nothing on hotel Wi-Fi or cellular, and it doesn't protect traffic once it leaves the access point.
• CIncorrect. A proxy setting redirects web requests to a proxy server for filtering or caching, but it doesn't create an encrypted tunnel for all corporate app traffic between the phone and the company network.
• DIncorrect. Tethering lets other devices share the phone's internet connection. It doesn't encrypt or protect the phone's own corporate app traffic on its way to company resources.

Answer: A) DFU (Device Firmware Update) or recovery mode

• ADFU/recovery mode is a special low-level state that bypasses the normal OS entirely, allowing firmware to be restored directly from a connected computer — the standard last-resort step for a device that won't boot even after a normal forced restart.
• BAirplane mode is a normal operating-system setting that disables radios; it requires the OS to already be running and has nothing to do with restoring firmware on an unresponsive device.
• CKiosk mode locks a working device to a single app; it's irrelevant to a device that won't boot at all.
• DDo Not Disturb silences notifications on a normally functioning device; it has no relationship to firmware recovery on an unresponsive phone.

Answer: A) Wearable device

A smartwatch that is worn on the body, tracks biometrics such as heart rate and steps, and syncs to a paired phone is a wearable device.

• AWearables such as smartwatches and fitness trackers are worn on the body, collect health and activity data, and usually sync with a companion app on a paired phone.
• BA smart home hub is a stationary IoT controller that links devices like lights and thermostats. It isn't worn on the body and doesn't collect biometric data.
• CAn e-reader is a handheld mobile device built mainly for reading digital books. It doesn't monitor heart rate or count steps.
• DA docking station is an accessory that connects a laptop or phone to peripherals and power. It's not a body-worn sensor device.

Answer: A) The aftermarket panel has different color and brightness specifications than the OEM panel

A replacement screen that works cleanly but shows a different tint and lower peak brightness most likely has different panel specifications than the OEM part. This is a common tradeoff with aftermarket screens.

• ACorrect. Compatible replacement panels aren't always built to the same color calibration or brightness rating as the factory part. A slightly different tint and lower peak brightness on a panel that otherwise works well is a common tradeoff with lower-cost non-OEM panels. An OEM-equivalent panel avoids it.
• BIncorrect. Disconnecting a panel doesn't corrupt the driver software. A driver problem would usually cause resolution or rendering issues, not a small change in color tint.
• CIncorrect. GPU overheating usually causes artifacts, crashes or throttling. It doesn't cause a steady change in color tint and brightness on a screen that otherwise works normally.
• DIncorrect. The digitizer handles touch input and has no effect on the panel's color reproduction or backlight brightness.