Programing where in all the classes implement certain standard or properly defined interface for writing apis that can be use d by other unrelated apis thus defining a porper and stable useability ...of them.Which means even in case of there are some changes in the apis, the dependent code would stay uneffected.Besides they enable polymorphic behaviour of an api i.e depending on the implementation. This feature is not only for unrelated apis but also there with in the same apis for further componentization.

In interface driven programming, you never call another layers implementation class directly. All the call happens through the interface which can be configured in the configuration file. Hence you will have less dependency between the layers.