Which describes best an EJB handle?

  1. An EJB handle is used to handle exceptions when accessing EJB objects.

  2. An EJB handle is used to store a reference to a specific EJB object.

  3. An EJB handle is part of the Home interface.

  4. An EJB handle is used for local references inside the EJB container.


Correct Option: B
Explanation:

To answer this question, the user needs to have knowledge of Enterprise JavaBeans (EJB) and how they are used in Java applications.

Now, let's go through each option and explain why it is right or wrong:

A. An EJB handle is used to handle exceptions when accessing EJB objects. This option is incorrect. An EJB handle is not used to handle exceptions. Exceptions in EJBs are typically handled using try-catch blocks or by declaring them in the method signature.

B. An EJB handle is used to store a reference to a specific EJB object. This option is correct. An EJB handle is used to store a reference to a specific EJB object. It allows the client to maintain a reference to an EJB object and use it to invoke methods on that object.

C. An EJB handle is part of the Home interface. This option is incorrect. An EJB handle is not part of the Home interface. The Home interface is used for creating and finding EJB objects, while the handle is used to store a reference to an existing EJB object.

D. An EJB handle is used for local references inside the EJB container. This option is incorrect. An EJB handle is not specific to local references inside the EJB container. It can be used for both local and remote references to EJB objects.

Therefore, the correct answer is:

The Answer is: B

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