EJB Stateless and Stateful beans

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Describe the life cycle for Stateful beans.

Answer

Between the client and the session bean, the state of the conversation can be maintained using a stateful session bean. The instance variables contain a state only during the invocation by a client method.

It implements ‘javax.ejb.SessionBean’ interface and is deployed with the declarative attribute ‘stateful’.

They have instance fields that can be initialized and modified by the client with each method invocation. The bean can use the conversational states as its business process methods.

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