Question 16 :
What is the difference between static and non-static variables?
A static variable is associated with the class as a whole rather than with specific instances of a class. Non-static variables take on unique values with each object instance.
Question 17 :
What is the difference between the paint() and repaint() methods?
The paint() method supports painting via a Graphics object. The repaint() method is used to cause paint() to be invoked by the AWT painting thread.
Question 18 :
What is the purpose of the File class?
The File class is used to create objects that provide access to the files and directories of a local file system.
Question 19 :
Can an exception be rethrown?
Yes, an exception can be rethrown.
Question 20 :
Which Math method is used to calculate the absolute value of a number?
The abs() method is used to calculate absolute values.