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Question: What is the difference between Session bean and Entity bean ?

Answer: The Session bean and Entity bean are two main parts of EJB container.
Session Bean
1. represents a workflow on behalf of a client
2. one-to-one logical mapping to a client.
3. created and destroyed by a client
4. not permanent objects
5. lives its EJB container(generally) does not survive system shut down
--two types: stateless and stateful beans
Entity Bean
1. represents persistent data and behavior of this data.
2. can be shared among multiple clients
3. persists across multiple invocations
4. findable permanent objects
5. outlives its EJB container, survives system shutdown
--two types: container managed persistence(CMP) and bean managed persistence(BMP)



Category J2EE Interview Questions & Answers - Exam Mode / Learning Mode
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Question: What is the difference between Session bean and Entity bean ?
Answer:

The Session bean and Entity bean are two main parts of EJB container.
Session Bean
1. represents a workflow on behalf of a client
2. one-to-one logical mapping to a client.
3. created and destroyed by a client
4. not permanent objects
5. lives its EJB container(generally) does not survive system shut down
--two types: stateless and stateful beans
Entity Bean
1. represents persistent data and behavior of this data.
2. can be shared among multiple clients
3. persists across multiple invocations
4. findable permanent objects
5. outlives its EJB container, survives system shutdown
--two types: container managed persistence(CMP) and bean managed persistence(BMP) Source: CoolInterview.com



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