Difference between retesting and regression testing

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Retesting is testing the same functionality again to ensure the defect is fixed, while regression testing is testing the unchanged parts of the software to ensure new changes haven't affected them.

Retesting is done to confirm that a specific defect has been fixed, while regression testing is done to ensure that new changes have not affected the existing functionality.
Retesting focuses on the defect fixes, while regression testing focuses on the unchanged parts of the software.
Retesting is usually performed by the same tester who found the defect, while regression testing can be done by any tester.
Example: If a bug was found in the login functionality and was fixed, retesting would involve testing the login functionality again to confirm the fix. Regression testing would involve testing other parts of the software to ensure the fix did not introduce new issues.

Difference between retesting and regression testing

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