What is the difference between adhoc and regression testing?

Question

Accepted Answer

Adhoc testing is informal and unplanned, while regression testing ensures that previous functionality is not affected.

Adhoc testing is performed without any specific test cases or plan.
It is usually done randomly or based on the tester's intuition.
Regression testing is performed to ensure that changes or additions to the software do not impact existing functionality.
It involves retesting the previously tested functionalities to ensure they still work as expected.
Adhoc testing is exploratory and helps in finding new defects.
Regression testing is systematic and helps in ensuring the stability of the software.
Adhoc testing is not repeatable, while regression testing is repeatable.
Example: Adhoc testing can be performed by randomly clicking on different buttons in a software application to see if any unexpected behavior occurs.
Example: Regression testing can be performed after fixing a bug to ensure that the fix did not introduce any new issues.

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