Which of the following is listed as an IoT device example?

• A. Bathroom scale
• B. Garage doors
• C. Refrigerator
• D. Smart thermostat

Answer: (B)

The main concept here is that an IoT device is something that connects to a network to send and receive data, enabling remote control and integration with other systems. A garage door that’s connected to Wi‑Fi and can be controlled from a smartphone or a home automation hub exemplifies this pattern: it not only opens or closes, but also reports its current state (open or closed) and can trigger other actions or alerts through the network. This combination of connectivity, state awareness, and remote control is what makes it a quintessential IoT example. While the other items can be IoT devices if they have smart features, the garage door opener is a classic, straightforward illustration of an IoT device in many introductory discussions.