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 have not affected existing functionality.

Retesting focuses on the defect fixes, while regression testing focuses on ensuring existing functionality is not impacted by new changes.
Retesting is done after a defect is fixed, while regression testing is done after new changes are made to the software.
Retesting is a subset of regression testing, as it only tests the specific defect area, while regression testing tests the entire software.
Example: After a bug is fixed in a login feature, retesting would involve testing the login functionality again to ensure the bug is resolved. Regression testing would involve testing other features to ensure the bug fix did not introduce new issues.

Difference between retesting and regression testing

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