Explain EJB in brief.

Explain EJB in brief.

- EJB is a standard for developing server side in JAVA.

- It specifies agreement between components and application servers that allows the components to run on the server.

- They are mainly for complex sever side operations like executing complex algorithm or high volume business.

- EJB provides the application layer logic, also called as middle tier.

- It provides a standard specifications-based way to develop and deploy enterprise-class system.
EJB Kinds - What are the kinds of EJB's?
EJB Kinds - There are 3 kinds of EJB's - Session beans, Entity Beans, Message-driven beans..
EJB Passivation and activation - What is Passivation and activation in EJB?
EJB Passivation and activation - EJB saves data from memory to hard disk thus allowing memory to be reclaimed. This process of saving memory data to hard disk is called passivation...
Describe the life cycle for stateless and Stateful beans.
EJB Stateless and Stateful beans - Between the client and the session bean, the state of the conversation can be maintained using a stateful session bean...
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