What is the deference between regression testing and re-testing?

Answer Posted / mahesh

Regression Testing-re-testing after fixes or modifications
of the software or its environment. It can be difficult to
determine how much re-testing is needed, especially near
the end of the development cycle. Automated testing tools
can be especially useful for this type of testing.

Re-testing--Retesting is done on the same build with
multiple sets of data.

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