Define equivalence partitioning briefly

Question

Define equivalence partitioning briefly?

Answer 1

In this partitioning we distinguish inputs which are being treated by the system in the same way and produce the same results. We can minimize the redundant test cases, by applying equivalence partitioning. The test cases should be like: -

If one test case identifies a bug, then the other should also be able to identify it.
All the test cases should test the same thing.
The test cases should produce the same results
If one of the test case does not identify the defect, then the other should also not identify it.