What are the key features of the EJB technology?

EJB Interview Questions and Answers

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5. What are the key features of the EJB technology?

1. EJB components are server-side components written entirely in the Java programming language
2. EJB components contain business logic only - no system-level programming & services, such as transactions, security, life-cycle, threading, persistence, etc. are automatically managed for the EJB component by the EJB server.
3. EJB architecture is inherently transactional, distributed, portable multi-tier, scalable and secure.
4. EJB components are fully portable across any EJB server and any OS.
5. EJB architecture is wire-protocol neutral--any protocol can be utilized like IIOP,JRMP, HTTP, DCOM,etc.

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Other Interview Questions

• Is is possible for an EJB client to marshal an object of class java.lang.Class to an EJB?
• What is message-driven bean?
• What is a Message Driven Bean, what functions does a message driven bean have and how do they work in collaboration with JMS?
• Is it possible to stop the execution of a method before completion in a SessionBean?
• Why is ejbFindByPrimaryKey mandatory?
• Is it legal to have static initializer blocks in EJB?
• What happens if remove( ) is never invoked on a session bean?
• What are the key benefits of the EJB technology?
• Can the primary key in the entity bean be a Java primitive type such as int?
• What is Entity Bean and Session Bean ?
• More...