Recently in an interview i was asked this question. What is regression testing. I told them if a change is done in the application or if a bug is fixed by the developer, we use to do regression testing and ensure that this bug is not having impact on the other modules of the application.
Interviewer asked, so for example if I have 1000 test cases with me should we run and see all the test cases for this bug fixing?.
I was not able to answer this question. Please help me.
NOTE : [This question was asked by umashankar]