In the context of a state-based and event-driven system that is described by a finite-state machine and exposes its functionality via an API, it is crucial to adopt a test definition strategy that can handle the dynamic nature of the system. Use case/exception case coverage is important because it ensures that all the functional paths and the exceptions are tested. This is particularly relevant when the behavior of the system under test (SUT) depends on hardware and communication links that can be unreliable. By focusing on use case/exception case coverage, the Test Automation Architecture (TAA) can be designed to validate the SUT’s behavior across all possible states and transitions, including handling exceptions and errors that may occur due to unreliable hardware or communication links.

References = The ISTQB CT-TAE materials emphasize the importance of a test definition strategy that covers use cases and exception cases, especially for systems that are state-based and event-driven12345. This approach aligns with the best practices for test automation, ensuring comprehensive coverage and robust testing of the SUT.