Interactive: Mobile Device Accessories and Connectivity

A user needs to tap their phone against a payment terminal to complete a small purchase. Which connection method supports this?

• Bluetooth

• Lightning

• Tethering

• NFC

Answer explanation

NFC works at very short range (a few centimeters) for tap-to-pay. Bluetooth pairs over longer distances and is not how contactless terminals authenticate a tap.

Tags

Blooms Level: Apply

A field technician needs their laptop online where no Wi-Fi exists but their phone has cellular data. What should they configure?

• NFC pairing

• Mobile hotspot

• Bluetooth sync

• Lightning cable

Answer explanation

A hotspot shares the phone's cellular data as Wi-Fi for other devices. NFC and Bluetooth are short-range and not designed to provide internet to a laptop in the field.

Tags

Blooms Level: Apply

A returning office worker wants one cable to connect a laptop to dual monitors, keyboard, mouse, and wired Ethernet. Which accessory best fits?

• Docking station

• Port replicator

• USB-C hub

• Bluetooth adapter

Answer explanation

A docking station extends a laptop into a full desktop setup including multiple displays and wired network. A port replicator mainly duplicates existing ports and typically offers less display and device expansion.

Tags

Blooms Level: Analyze

Which statements correctly distinguish NFC from Bluetooth? (Select all that apply)

• Bluetooth requires physical contact to connect

• NFC operates at only a few centimeters

• Bluetooth typically pairs across a room

• NFC transfers large files faster than Bluetooth

Answer explanation

NFC is very short range; Bluetooth reaches roughly 10 meters. NFC is slow and used for small handshakes, not bulk transfers, and Bluetooth does not require touching devices together.

Tags

Blooms Level: Analyze

Which accessories primarily extend a mobile device's INPUT capabilities? (Select all that apply)

• Stylus

• Drawing pad

• External speaker

• Headset microphone

Answer explanation

A stylus and drawing pad send input (touch, handwriting, pen pressure) to the device. A speaker is output only; a headset mic is input but the headset itself is primarily an audio output accessory.

Tags

Blooms Level: Analyze

An older Android phone uses a (a)   port, while a current iPhone 14 uses a (b)   port.

• USB-C

• Lightning

• microUSB

• miniUSB

• USB-A

Answer explanation

Older Android phones shipped with microUSB before USB-C became standard. The iPhone 14 still uses Apple's Lightning connector; USB-C on iPhones starts with the iPhone 15.

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Blooms Level: Understand

For quick contactless pairing of a speaker, use (a)   ; for ongoing audio streaming, use (b)   .

• NFC

• Bluetooth

• Tethering

• Lightning

• USB-C

Answer explanation

NFC handles the fast tap-to-pair handshake, then hands off to Bluetooth for the actual audio stream. NFC itself does not have the bandwidth to carry continuous audio.

Tags

Blooms Level: Apply

Match each user need to the most appropriate accessory or method.

• Hotspot

• Tap phone to unlock a door reader

• Stylus

• Join calls privately in a shared office

• NFC

• Share phone's cellular data with a laptop

• Headset

• Annotate a PDF with handwritten notes

Answer explanation

Each need maps to the accessory or method that uniquely solves it. A headset, not a speaker, keeps calls private; NFC, not Bluetooth, handles the short tap-to-unlock handshake.

Tags

Blooms Level: Apply

Sort each technology by its typical effective range.

Groups:

(a) Touch range (under 10 cm)

,

(b) Personal area (about 10 m)

,

(c) Wide area (cellular)

• NFC pairing handshake

• NFC tap-to-pay

• Bluetooth speaker

• Bluetooth keyboard

• USB tethering over cellular

• Mobile hotspot

• Bluetooth headset

• Cellular data sharing to tablet

Answer explanation

Range is the practical sorting rule: NFC needs near contact, Bluetooth covers a room, and cellular-based sharing reaches wherever the carrier signal reaches. Misplacing Bluetooth into touch range is the most common mix-up.

Tags

Blooms Level: Analyze