Puspendu:

In order to get HP certifications of any type, you first need an HP Student ID#. Call (800) 732-5741 and request a student ID. You will have that for the rest of your HP life. If you already have one, then disregard calling for a number.

Then you can proceed to this website and it will list everything you need and the tests that need to be passed in order to be certified.

http://h10017.www1.hp.com/certification/examinfo.html

Some tests are web based and some are Prometrics (which means you have to go to a testing facility to take the exam).

I hope this helps!
-Bill Towe