Software Quality Assurance Practice Exam

Which testing method primarily focuses on validation of output based on input conditions?

1. Unit testing

2. Integration testing

3. System testing

4. Acceptance testing

The correct answer is: System testing

The method that primarily focuses on validating output based on input conditions is system testing. This phase of testing evaluates the complete integrated system to ensure that it meets the specified requirements. System testing is conducted to assess how well the software performs as a whole, including examining the interactions between components and verifying that the application behaves correctly in a real-world scenario. During system testing, various scenarios are executed using different input conditions to confirm that the output aligns with the expected results. This process helps ensure that the software not only meets functional requirements but also adheres to non-functional qualities like performance and security. Unit testing, on the other hand, focuses on individual components or functions in isolation, confirming their correctness without consideration for other parts of the system. Integration testing examines interactions between components after unit testing, but it does not typically validate the system as a whole against requirements. Acceptance testing is performed to verify if the system meets the acceptance criteria defined by stakeholders, often involving testing from an end-user perspective, but it may not always focus solely on input-output validation.