What is regression testing, retesting? and the difference between them.

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Regression testing is testing the unchanged parts of the software after making changes to ensure that the changes did not affect the existing functionality. Retesting is testing the same functionality again after fixing the defects.

Regression testing is done to ensure that the changes made to the software did not affect the existing functionality.
Retesting is done to ensure that the defects found during testing have been fixed.
Regression testing is done after making changes to the software, while retesting is done after fixing the defects.
Regression testing is automated, while retesting can be manual or automated.
Example of regression testing: testing the login functionality after adding a new feature to the dashboard.
Example of retesting: testing the login functionality again after fixing a defect that was found during the previous testing.

What is regression testing, retesting? and the difference between them.

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