Certified Associate in Software Testing (CAST) Practice Test

Which testing approach focuses on overall behavior of the program without knowledge of internal logic?

1. Structural Testing

2. Functional Testing

3. Non-Functional Testing

4. Regression Testing

The correct answer is: Functional Testing

Functional testing is a testing approach that centers on verifying that the software behaves as expected from an end-user's perspective. In this type of testing, the focus is on what the software does rather than how it does it. Testers design test cases based on the specified requirements and functionalities of the application without needing to understand the internal workings or code structure of the program. This approach ensures that the software performs its intended functions in various scenarios, often using inputs to evaluate outputs. It assesses whether each feature of the software operates according to the required specifications, thus ensuring that users receive the expected results. While other testing approaches such as structural testing examine internal logic and code, functional testing is all about the external behavior of the application. This makes it essential for validating that the system meets user requirements and behaves correctly in all specified conditions.