What is the behavior of actions in relation to requests and responses?

Actions in OutSystems are designed to be integrated into the lifecycle of requests and responses, providing a way to execute specific logic at key points during this process. The correct choice emphasizes that actions are automatically triggered either before a request is processed or after a response is generated. This behavior allows developers to encapsulate common logic, such as validations or logging, ensuring it runs consistently at the appropriate times without requiring manual invocation.

This automatic invocation is crucial for maintaining data integrity, enhancing user experience, and managing application state. For example, by assigning validations to run before a request, developers can prevent invalid data from being processed. Similarly, executing actions after a response can be useful for handling tasks like updating user interfaces or processing metrics such as response times.

The other options do not align with how actions function in OutSystems. They do not limit their execution to a single point in the request-response cycle, nor do they only operate on failure responses or avoid being automatically called altogether. Therefore, the behavior outlined in the correct choice captures the essential mechanism of actions in relation to requests and responses in OutSystems.