Certified Associate in Software Testing (CAST) Practice Test

In structural testing, what is the primary focus?

1. Behavioral outputs

2. Internal logic of the system

3. Security features

4. User interface design

The correct answer is: Internal logic of the system

In structural testing, the primary focus is on the internal logic of the system. This approach is also known as white-box testing, where testers assess the internal structure and workings of the application. Unlike black-box testing, which emphasizes behavioral outputs and functionality from an external perspective, structural testing allows testers to evaluate how the software operates at a code level. By examining the internal components, such as control flow, data flow, and the structure of the code, testers can identify logical errors, ensure that all paths in the code are tested, and verify that the implementation meets the specified requirements. This thorough examination is crucial for catching issues that are not apparent through external testing methods, thus increasing the reliability and robustness of the system before it goes into production. The other options, while important in their own contexts, do not align with the primary focus of structural testing. Behavioral outputs relate to what the system does from the user's perspective, security features concern safeguarding the application from vulnerabilities, and user interface design focuses on the visual aspect of the application as perceived by the end-user. However, structural testing primarily concentrates on understanding and validating the system's internal mechanics.