Set - 8

Question 36 :

Name Container classes.

Answer :

Window, Frame, Dialog, FileDialog, Panel, Applet, or ScrollPane


Question 37 :

What is the List interface?

Answer :

The List interface provides support for ordered collections of objects.


Question 38 :

What is the difference between a Scrollbar and a ScrollPane?

Answer :

A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. A ScrollPane handles its own events and performs its own scrolling.


Question 39 :

What is tunnelling?

Answer :

Tunnelling is a route to somewhere. For example, RMI tunnelling is a way to make RMI application get through firewall. In CS world, tunnelling means a way to transfer data.


Question 40 :

What is meant by "Abstract Interface"?

Answer :

First, an interface is abstract. That means you cannot have any implementation in an interface. All the methods declared in an interface are abstract methods or signatures of the methods.