What is the focus of confirmation testing?

The focus of confirmation testing, also known as re-testing, is to rerun test cases that previously failed in order to verify that the issues have been resolved. When defects are identified in the software during testing, developers will typically fix these defects. Confirmation testing is then performed to ensure that the fixes work as intended and that the defect no longer exists in the application. This process ensures that the software meets its specified requirements after the changes have been made.

In the context of agile testing, this practice is crucial because it emphasizes continuous verification of quality, allowing teams to quickly identify any regressions or new issues that could arise after code changes. It helps maintain the integrity of the software through iterative development cycles, thereby supporting quality assurance efforts in agile environments where changes are frequent.

Other options do not specifically address the primary goal of confirmation testing. Confirming usability requirements, validating black-box testing effectiveness, and assessing overall system design are all important aspects of software quality but do not pertain directly to the concept of confirming that previously identified defects have been resolved.