Software Quality Assurance Practice Exam

What type of module testing incorporates strategies such as top-down and bottom-up?

1. Coverage testing

2. Incremental integration

3. Big-bang testing

4. Functional testing

The correct answer is: Incremental integration

The correct choice is incremental integration, which involves testing modules in two primary strategies: top-down and bottom-up. In top-down integration, testing starts with the highest-level modules and progressively integrates lower-level modules. This allows for early detection of issues in the system's architecture and high-level logic, ensuring that the overall system functions correctly from the outset. Conversely, bottom-up integration starts with the lower-level modules and integrates them upward. This approach allows for testing the most detailed components first before connecting them into higher-level modules. It provides confidence in the foundational elements of the software before testing the complete system. These strategies are fundamentally about building and testing the software incrementally, which helps in identifying and fixing defects at various levels of integration. This contrasts with other testing methods where the entire system is often tested at once, such as big-bang testing, which can make it challenging to pinpoint the source of any issues that arise. Coverage testing focuses more on identifying the parts of the code that have been executed and is unrelated to the incremental integration approach. Functional testing involves checking specific functionalities against requirements rather than focusing on the incremental integration of system modules.