Software Quality Assurance Practice Exam

Which of the following statements best represents the concept of Bottom-up testing?

1. Creates test conditions and concludes test results easily

2. Finds difficulty in test case representation in stubs, before the I/O function addition

3. Conducts testing from sub module to main module

4. Conducts testing from main module to sub module

The correct answer is: Conducts testing from sub module to main module

The concept of Bottom-up testing is best captured by the idea of conducting testing from sub-modules to the main module. This approach focuses on testing individual components or sub-modules first, ensuring they function correctly in isolation. Once these lower-level components have been tested and verified, they are then integrated into higher-level systems. This method is beneficial because it allows for early detection of defects in the sub-modules before they are integrated into larger components of the application. By ensuring that every building block is verified, it reduces the complexity and risks associated with testing at higher levels. This strategy emphasizes a thorough understanding of each part of the system, which contributes to a more stable and reliable overall software product. In contrast, other options reference aspects of testing that do not align with the Bottom-up approach. For instance, creating test conditions and concluding test results easily can apply to various testing methodologies and does not specifically represent the bottom-up philosophy. Similarly, finding difficulty in test case representation in stubs before adding I/O functions pertains to challenges faced during integration testing, which falls outside the focus of Bottom-up testing itself. Lastly, conducting testing from the main module to the sub-modules directly contradicts the Bottom-up testing concept, as it describes a top-down approach instead