You can code a default exception handler by creating a catch block

The correct answer is: A. with no arguments.

A default exception handler is a catch block that catches all exceptions that are not caught by any other catch block. It is created by creating a catch block with no arguments.

The other options are incorrect because:

• B. with a void argument is not a valid way to create a default exception handler.
• C. with an ellipsis as its argument is not a valid way to create a default exception handler.
• D. with an argument identical to that thrown is not a valid way to create a default exception handler.

Here is an example of a default exception handler:

try {
// code that might throw an exception
} catch (Exception e) {
// handle the exception
}

In this example, the catch block will catch any exception that is thrown in the try block. If no other catch block catches the exception, the default exception handler will be executed.