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	EJB Interview Questions & Answers Below we have listed all the EJB Interview Questions and answers. Feel free to comment on any EJB Interview Questions or answer by the comment feature available on the page. To buy an eBook containing 30,000 Interview Questions, with Answers, Click Here. View All EJB Interview Questions & Answers - Exam Mode / Learning Mode
EJB Interview Questions & Answers
Enterprise Java Beans (EJB) is a development architecture for building highly scalable and robust enterprise level applications to be deployed on J2EE compliant Application Server such as JBOSS, Web Logic etc. Enterprise JavaBeans (EJB) is an architecture for setting up program components, written in the Java programming language, that run in the server parts of a computer network that uses the client/server model.

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Question	Rating	View Answer
If i throw a custom ApplicationException from a business method in Entity bean which is participating in a transaction, would the transaction be rolled back by container. Does container rolls back transaction only in case of SystemExceptions?		View Answer
Can i map more than one table in a CMP?		View Answer
What are simple rules that a Primary key class has to follow?		View Answer
How is Stateful Session bean maintain their states with client?		View Answer
Is it possible to invoke multiple Session beans from one Session bean using Reflection?		View Answer
Is it possible to share an HttpSession between a JSP and EJB. What happens when I change a value in the HttpSession from inside an EJB?		View Answer
What is clustering. What are the different algorithms used for clustering?		View Answer
How to implement an entity bean which the PrimaryKey is an autonumeric?		View Answer
How many EJB Objects are created for a Bean?		View Answer
What is abstract schema?		View Answer
What is re-entrant. Is session beans reentrant. Is entity beans reentrant?		View Answer
Why an onMessage call in Message-driven bean is always a seperate transaction?		View Answer
Does Stateful Session bean support instance pooling?		View Answer
Why does EJB needs two interfaces(Home and Remote Interface)		View Answer
Can I invoke Runtime.gc() in an EJB?		View Answer
Can a Session Bean be defined without ejbCreate() method?		View Answer
Why are ejbActivate() and ejb Passivate() included for stateless session bean even though they are never required as it is nonconversational bean?		View Answer
With EJB 1.1 specs, why is unsetSessionContext() not provided in Session Beans, like unsetEntityContext() in Entity Beans?		View Answer
What is the difference between ejbStore() and ejbLoad()?		View Answer
What is the difference between ejbCreate() and ejbPostCreate		View Answer