What is difference between Regression and Restesting?

Answer Posted / surii

Regression Testing : In this testing already tested
functionality is once again tested whenever there is a
change i.e. associated with inorder to check whether the
already existed functionality has got affected or not.

Retesting : In this testing already tested functionality is
once again tested with different sets of test data. Before
going to raise any defect it is a tester responsibility to
check whether that defect is a reproduceble or not. So test
engg. must confirm that defect wiht different sets of test data.

Retesting is performed in Regression testing but not vice versa.

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