Black Box testing involves looking at the specifications and does not require examining the code of the program. It is done from customer’s point of view. The testers know the input and expected output. They will check whether with given input they are getting expected output or not.

Different techniques of Black Box test are:

1. Requirement base testing

2. Positive negative testing

3. Boundary value analysis

4. Decision tables

5. Equivalence partitioning

6. State based testing

7. Compatibility testing

8. User documentation testing

9. Domain testing