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regression testing comparison table

Subject	have purpose	has definition	test	is a kind of
testing performed by software engineers				testing
regression testing	to test software again once some defects have been fixed in case new defects have been inadvertently added	The process of re-testing the a system, using a selected subset of test cases, after changes are made	a subset of the previously successful test cases because it tends to be far too expensive to re-run every single test case every time a change is made to software	testing performed by software engineers

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