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Mobile and IoT Devices Flashcards

7 cards from real ICT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Mobile and IoT Devices flashcards as text

  1. Which wireless protocol is most commonly used for short-range IoT device communication with very low power consumption?

    Answer: Zigbee

    Zigbee operates in the 2.4 GHz band and is designed for low-power, low-data-rate IoT mesh networks.

  2. A mobile device is running low on battery. Which power-saving feature allows the device to receive push notifications while using minimal energy?

    Answer: Doze mode

    Doze mode (Android) reduces background CPU and network activity while still allowing high-priority push notifications.

  3. What does the acronym IMEI stand for in mobile devices?

    Answer: International Mobile Equipment Identity

    IMEI (International Mobile Equipment Identity) is a unique 15-digit number that identifies a mobile device globally.

  4. Which IoT communication protocol is specifically designed for sending small messages over unreliable networks with minimal bandwidth?

    Answer: MQTT

    MQTT (Message Queuing Telemetry Transport) is a lightweight publish-subscribe protocol ideal for IoT devices on constrained networks.

  5. A user wants to track their fitness data across multiple apps without re-entering it. Which Android feature enables this sharing between health apps?

    Answer: Health Connect

    Health Connect (formerly Google Health Connect) is a centralized health data repository allowing apps to share and access fitness data securely.

  6. What is the maximum theoretical data transfer speed of USB 3.2 Gen 2x2?

    Answer: 20 Gbps

    USB 3.2 Gen 2x2 uses two lanes simultaneously, each at 10 Gbps, achieving a maximum of 20 Gbps.

  7. Which technology allows a smartphone to emulate a credit card for contactless payments at NFC-enabled terminals?

    Answer: HCE (Host Card Emulation)

    HCE (Host Card Emulation) allows Android devices to emulate NFC smart cards for payments without requiring a hardware secure element.