What are the app's user interface components called?

The user interface components of an OutSystems application are referred to as Web Screens. Web Screens serve as the primary means through which users interact with the application, allowing them to view information and perform actions such as submitting data or navigating through the app.

Web Screens are designed using OutSystems’ visual development environment, where developers can drag and drop interface elements and configure their properties without needing extensive coding. This visual approach enables rapid development and consistent user experiences across different screens.

Other choices do not represent user interface components effectively. A browser is the software that users employ to access web applications; it is not a component of the application itself. HTTP response refers to the messages sent by the server in response to a client's request, explaining the communication process rather than its user interface. API endpoints are specific URLs where applications can interact programmatically, typically for data exchange, rather than being associated with user-facing UI components.

Thus, the term Web Screens accurately describes the interactive interface elements within OutSystems applications.