Hello "Shail"-
Welcome to JavaRanch.
On your way in you may have missed that we have a
policy on screen names here at JavaRanch. Basically, it must consist of a first name, a space, and a last name, and not be obviously fictitious. Since yours does not conform with it, please take a moment to change it, which you can do
right here.
As to your question, have a look at the
http://faq.javaranch.com/java/IBMXMLCertificationFaq page. It contains much useful information, and also links to various mock exams.