Set - 6

Question 26 :

How can the Checkbox class be used to create a radio button?

Answer :

By associating Checkbox objects with a CheckboxGroup.

Question 27 :

Which non-Unicode letter characters may be used as the first character of an identifier?

Answer :

The non-Unicode letter characters $ and _ may appear as the first character of an identifier

Question 28 :

What restrictions are placed on method overloading?

Answer :

Two methods may not have the same name and argument list but different return types.

Question 29 :

What happens when you invoke a thread's interrupt method while it is sleeping or waiting?

Answer :

When a task's interrupt() method is executed, the task enters the ready state. The next time the task enters the running state, an InterruptedException is thrown.

Question 30 :

What is the return type of a program's main() method?

Answer :

A program's main() method has a void return type.