need help with these java questions

13.

By default, the methods associated with the Socket and ServerSocket classes in Java operate in a blocking mode. What does blocking mean in this context? How would non-blocking operations differ?

(This question is meant to require a short, 2-3 sentence, answer.)

19. In Java, how does object serialization differ from JavaBeans persistence?

20.

Order the steps of a server response to an RMI call

Question 20 options:

	marshall and send the return data to the client stub
	locate the remote object to be called
	capture the return value or exception
	call the desired method, passing it the parameters

23. true or false? Remote objects cannot be inserted into a HashSet because any method call on a remote object can result in a RemoteException being thrown, but the equals()and hashCode() methods are not allowed to throw exceptions.