Set - 6

Question 31 :

Name four Container classes.

Answer :

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


Question 32 :

What is the difference between a Choice and a List?

Answer :

A Choice is displayed in a compact form that requires you to pull it down to see the list of available choices. Only one item may be selected from a Choice. A List may be displayed in such a way that several List items are visible. A List supports the selection of one or more List items.


Question 33 :

What class of exceptions are generated by the Java run-time system?

Answer :

The Java runtime system generates RuntimeException and Error exceptions.


Question 34 :

What class allows you to read objects directly from a stream?

Answer :

The ObjectInputStream class supports the reading of objects from input streams.


Question 35 :

What is the difference between a field variable and a local variable?

Answer :

A field variable is a variable that is declared as a member of a class. A local variable is a variable that is declared local to a method.