This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
If an RMI parameter implements java.rmi.Remote, how is it passed "on-the-wire?" Choice 1It can never be passed. Choice 2It is passed by value. Choice 3It cannot be passed because it implements java.rmi.Remote. Choice 4It cannot be passed unless it ALSO implements java.io.Serializable. Choice 5It is passed by reference.
I think 5 is closest, though it is not strictly "pass by reference" but passing the stub to simulate pass by reference.