Internet of Things (IoT) Practice Exam

In a sensor-control system, which component typically performs the action based on sensor data?

1. ADC

2. Simplifier

3. Actuator

4. Controller

The correct answer is: Actuator

In a sensor-control system, the component that typically performs the action based on sensor data is the actuator. Actuators are responsible for converting the signals they receive from a controller into physical motion or action. When sensors gather data from the environment, this information is processed and often sent to a controller, which interprets the data and determines what action is necessary. The controller then sends commands to the actuator, which executes the desired effect—such as moving a motor, opening a valve, or activating a switch. Understanding the roles of other components is helpful in recognizing their functions. An analog-to-digital converter (ADC), for example, is crucial for translating the analog signals generated by sensors into digital signals that can be understood by a controller. Meanwhile, a simplifier is usually involved in data processing but does not perform actions. Lastly, while the controller is vital for decision-making, it does not carry out the physical action itself, which is the role of the actuator.