This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
I've doubt on the following question from ejcertificate.com. I'm wondering why can't 3 and 4 be correct?! I think 3 is correct b'coz the deployer can always modify the values of the env. entries and option 4 sounds vague b'coz of the word "enterprise bean instances". Experts, please advise!
Which of the following statements regarding an enterprise bean's environment are correct?
1. The container provides the tools that allow the deployer to create and manage the enterprise bean's environment. 2. Enterprise bean instances can modify the values of the environment entries at runtime. 3. The deployer sets and modifies the values of the environment entries by editing the enterprise bean's deployment descriptor. 4. Enterprise bean instances obtain the values of the environment entries from the enterprise bean's deployment descriptor. 5. Enterprise bean instances use the JNDI interfaces to obtain the values of the environment entries.
Answers 1 and 5 are correct.
Answer 2 is incorrect because enterprise bean instances can only read the values of the environment entries at runtime and are not able to modify them. Answers 3 and 4 are incorrect because the deployment descriptor is used to define only the environment entries, as opposed to the values that the enterprise bean expects to be provided at runtime.