CHECK V RUNTIME EXCEPTION

Question

Hi there
What is the difference between a checked and runtime exception?

Answer 1

All exceptions are checked and
are required to be caught in a try-catch block unless
they are descended from RuntimeException.
You aren't required to catch runtime exceptions in a try-catch block while you are required to catch checked exceptions. Oh, really? I had a question like this when my company gave us a Java exam. Almost every one got that one wrong.
The question was whether a thrown checked exception must eventually
be caught and handled by the program.
Consider this:
public class ExcTest
  public static void main(String[] a)throws IOException
       throw new IOException();
Here, a checked exception is thrown and not handled by the programmer.