What is the difference between caching and pooling ??

Ususally we got confuse to explain difference in Pooling and Caching ...
Simple Answer is :

Caching : Maintain state of the items(Object) in the memory or say in the pool.If object of same state earlier used available in pool then program will reuse that otherwise it will hit the actual resource to populate new object.

Pooling :  Does not maintain state of the items(Object) in the memory or say in the pool. Any object which is free in the pool can be used. If no object is free then will wait to be free or will create new one , depends on implementation.