What is black box testing? Solution Black Box Testing:- Black box testing refers to the testing of an application or software, it is actually used to test the functionality of the particular software without actually connecting the software to the actual peers,which it will use when it will actually start working. So in other words we can say that is a dummy kind of testing done before launching the Software or the Application to make sure that it is working up to the mark. It is also used to test different stages of the software while it is being build like unit, integration, system and acceptance,that is each virtual layer of testing can be done before the Software or the Application is Released. .