What is difference between regression and confirmation testing?

Regression testing and confirmation testing are both important parts of the software testing process, but they serve different purposes.

Confirmation testing (also called re-testing) is done to verify whether a specific bug or defect that was reported earlier has been successfully fixed. It focuses only on the particular issue that was identified and ensures that the fix works as expected.

Regression testing, on the other hand, is performed after confirmation testing to check whether the recent changes (like bug fixes or new features) have affected the existing functionality of the application. It helps ensure that no new issues have been introduced elsewhere in the system.

Both testing types are essential for maintaining software quality. If you're learning about these testing strategies in depth, institutes like Uncodemy include them as part of their software testing training, combining theory with hands-on practice to help students understand real-world QA scenariOS.