Question 16 :
What is exception ?
An event during program execution that prevents the program from continuing normally; generally, an error. The Java programming language supports exceptions with the try, catch, and throw keywords. See also exception handler.
Question 17 :
What is exception handler ?
A block of code that reacts to a specific type of exception. If the exception is for an error that the program can recover from, the program can resume executing after the exception handler has executed.
Question 18 :
What is executable content ?
An application that runs from within an HTML file. See also applet.
Question 19 :
What is extends ?
Class X extends class Y to add functionality, either by adding fields or methods to class Y, or by overriding methods of class Y. An interface extends another interface by adding methods. Class X is said to be a subclass of class Y. See also derived from.
Question 20 :
What is field ?
A data member of a class. Unless specified otherwise, a field is not static.