Internet of Things (IoT) Practice Exam

In a given system, what type of device is an outdoor camera?

1. Sensor

2. Actuator

3. Control

4. None of the above

The correct answer is: Sensor

An outdoor camera is classified as a sensor because its primary function is to capture visual data from its surrounding environment. In the context of the Internet of Things (IoT), sensors are devices that detect and respond to certain stimuli, such as light, motion, or sound. Outdoor cameras are equipped with technology to monitor activities, detect movements, and capture images or video, which aligns with the core function of a sensor—gathering data for further analysis or action. While actuators are devices that perform actions in response to commands, and control devices manage or regulate systems, these do not apply to the function of an outdoor camera. The camera’s role is solely to sense and gather information rather than take action or control other devices. Hence, identifying the outdoor camera as a sensor accurately reflects its function in an IoT ecosystem.