Ch-5 Q No.5 Coffee Cram Mock Exam

Which are ways in which a client can get a reference to an existing entity object's remote component interface?
A. Call ejbCreate()
B. Obtain the reference from the handle.
c. Call a method on the entity object's primary key.
D. Recieve the reference as a parameter in a method call.
E. Use a finder method defined in the remote home interface.

I think i'vent understood option D well. How can the client even recieve a reference as a parameter, it can only get it as a return value. My point is that a bean would never call method on a client, so how could the reference be received as a parameter.

Same is with Q No 3.

Thanks,
Puneet

No, you're right. The bean would never call a method in the client. However, something else might. That is, another client gets a reference to the bean, than calls a method on your client that passes that reference as a parameter. I'm not sure why you'd want to do that, but that didn't stop my former coworkers from doing it continously.

Parameter actually means return type here. What they mean is you can call a method on a bean, that method can look up and return the component interface reference of another bean which you can receive as the return value of that call