By using the $.ajaxSetup() we can handle the error/exception as mentioned below:

1. $(function() {
2.     $.ajaxSetup({
3.         error: function(jqXHR, exception) {
4.             if (jqXHR.status === 0) {
5.                 alert('Not connect.\n Verify Network.');
6.             } else if (jqXHR.status == 404) {
7.                 alert('Requested page not found. [404]');
8.             } else if (jqXHR.status == 500) {
9.                 alert('Internal Server Error [500].');
10.             } else if (exception === 'parsererror') {
11.                 alert('Requested JSON parse failed.');
12.             } else if (exception === 'timeout') {
13.                 alert('Time out error.');
14.             } else if (exception === 'abort') {
15.                 alert('Ajax request aborted.');
16.             } else {
17.                 alert('Uncaught Error.\n' + jqXHR.responseText);
18.             }
19.         }
20.     });
21. });

Reference: StackOverflow.com