Software Quality Assurance Practice Exam

Which testing type directly evaluates the interaction of combined modules?

1. Unit testing

2. Integration testing

3. SYSTEM testing

4. Regression testing

The correct answer is: Integration testing

Integration testing is a crucial phase in the software testing life cycle where the interaction between combined modules is directly evaluated. This type of testing focuses on identifying issues that may arise when individual components or modules of a system are integrated and work together. The primary goal of integration testing is to ensure that the modules interact correctly, facilitating data exchange and functioning as intended within the larger system. During this process, testers check for interface defects, data flow issues, and response errors that may not have been evident during unit testing, where individual components are assessed in isolation. Other types of testing, while important, focus on different aspects. Unit testing evaluates each module independently, ensuring that each works correctly on its own. System testing assesses the complete and fully integrated system to verify that it meets the specified requirements as a whole. Regression testing, on the other hand, focuses on ensuring that new code changes do not negatively impact the existing functionality of the software. Integration testing is essential for uncovering bugs related to the interaction between modules, which might not show up in earlier testing phases, thereby playing a critical role in delivering a robust software product.