ICT Mobile and IoT Devices 2

Question 1

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

Accepted Answer

Zigbee

Answer

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

Question 2

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

Accepted Answer

Doze mode

Answer

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

Question 3

What does the acronym IMEI stand for in mobile devices?

Accepted Answer

International Mobile Equipment Identity

Answer

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

Question 4

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

Accepted Answer

MQTT

Answer

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

Question 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?

Accepted Answer

Health Connect

Answer

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

ICT - Information Communication Technology Practice Test