Ad-hoc testing & Exploratory Testing

Ad hoc testing-
Testing is performed without planning and documentation. Ad hoc testing is a part of exploratory testing. It is concerned with the Application Testing without following any rules or test cases. One should have strong knowledge about the Application for Ad hoc testing.
Exploratory testing -
It is done to test design and test execution at the same time. Exploratory tests, unlike scripted tests, are not defined in advance and carried out precisely according to plan. In this, test design and execution is done at the same time.