Software Quality Assurance Practice Exam

What type of testing combines previously tested modules with a new module?

1. Non-incremental testing

2. Logic testing

3. Incremental testing

4. Big-bang testing

The correct answer is: Incremental testing

Incremental testing is a method that focuses on combining previously tested modules with new ones. This approach allows testers to ensure that new functionality can work alongside existing functionalities without introducing new defects. It promotes systematic verification and validation of both old and new components incrementally, leading to enhanced test coverage and a better understanding of the interactions between modules. By testing in increments, teams can identify problems more easily since changes are made in smaller, manageable batches. This also allows for easier debugging, as defects can be traced back to specific modules or combinations thereof. Incremental testing is particularly effective in agile environments where development is iterative, giving immediate feedback on the integration of new features with the existing system. In contrast, non-incremental testing would typically evaluate the system as a whole, without breaking it down into manageable parts, potentially missing issues arising from integrations. Logic testing is focused on the correctness of the logic within the application rather than the interaction between modules. Big-bang testing refers to the practice of integrating all components at once and testing them at the end, which increases the complexity of identifying defects. Each of these methods lacks the systematic, iterative approach that characterizes incremental testing.