Explain in detail about Black box testing.

Black box or behavioural testing focuses on the functional needs of the software.

It is applied during the last stage of testing.

Syntax driven testing is suitable for the specification which are explained by a certain grammar.

Decision table based testing is implemented when the original software requirement have been formulated in the arrangement of " if-then" statements.

Liquid level control is the study of a easy control problem which is designed to check the liquid level. It has 2 sensors.

Cause effect graphs in functional testing.