What is one of the functions of the IoT Central REST API?

The IoT Central REST API plays a crucial role in managing device templates within Azure IoT Central. Specifically, it allows for the retrieval, updating, and deletion of device templates, which are essential for defining how devices should behave and how they should interact with the IoT Central service. Device templates contain device capabilities, properties, and the telemetry that devices send. By using the REST API, developers can programmatically manage these templates to adapt to changes in device capabilities or configurations, ensuring that the IoT solutions remain agile and responsive to business needs.

The other functions mentioned, such as providing a graphical interface for user management, generating reports, and managing user roles and permissions, are typically handled through different aspects of the IoT Central platform rather than the REST API. The REST API focuses on data interactions, allowing for seamless device management and integration into broader applications, making option B the most relevant function in the context of this question.