Mobile Devices
Free CompTIA A+ (Core 1) practice — 6 questions on Mobile Devices, with explanations. No sign-up. Full 12-question mixed test →
A technician configures a user's phone to sync corporate email so that read/unread status and folder structure remain identical across the phone, tablet, and desktop client, and all traffic must be encrypted in transit. Which protocol and port combination should be configured for incoming mail?
IMAP4 keeps mail on the server and synchronizes state (read/unread, folders) across multiple devices. Port 993 is IMAP over implicit SSL/TLS, satisfying the encryption requirement.
A technician is replacing a failed Wi-Fi/Bluetooth combo card in a laptop. The old card is an M.2 form factor with an A+E key notch configuration. Which slot in the laptop will physically and electrically accept the replacement card?
M.2 wireless cards almost always use the A+E key, which routes PCIe and USB lines appropriate for Wi-Fi/Bluetooth modules; laptop vendors dedicate an A+E-keyed slot specifically for this.
A retail customer wants to pay by simply tapping their phone against a payment terminal reader, with no pairing screen or app confirmation dialog appearing beforehand. Which wireless technology is responsible for this specific tap-to-pay behavior?
NFC operates over a very short range (a few centimeters) and is designed for near-instant, tap-based transactions like contactless payment, requiring no manual pairing step.
An employee's phone enrolled in the company's MDM is reported lost. Corporate policy requires removing all company email, documents, and VPN profiles from the device, but the employee's personal photos, contacts, and non-corporate apps must remain untouched. Which MDM capability should the administrator use?
MDM containerization isolates corporate data (email, docs, VPN profiles) inside a managed container; a selective/corporate wipe erases only that container, leaving personal data intact.
A laptop with an LED-backlit LCD panel displays an extremely dim image, though content is faintly visible with a flashlight in a dark room. The technician initially assumes a failed inverter, as would be diagnosed on an older CCFL laptop with the identical symptom. Which component should actually be checked on this LED-backlit unit?
LED-backlit displays use a low-voltage LED driver circuit (often integrated on the motherboard or panel) instead of a high-voltage inverter; the dim-but-visible symptom points to a failing LED driver or backlight power path, not a missing inverter.
A salesperson needs to give their laptop internet access using their phone's cellular data plan by connecting a single USB cable between the two devices, and no other nearby device should be able to join that connection. Which feature should be enabled on the phone?
USB tethering shares the phone's cellular connection with exactly one connected device over the physical USB cable, matching both the wired requirement and the single-device restriction.
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