Hi PiyushSukhdeve,
It sounds like you're just starting out. Is that true? Have you done any studying so far?
If you're just beginning, then it would be a good idea to take a FULL-LENGTH practice CAT Test; you can download 2 for free from
www.mba.com (and they come with some additional practice materials). If you want to do a bit of studying first, so that you can familiarize yourself with the basic concepts and questions types that are tested, then that's fine, but you shouldn't wait too long to take that first CAT. A FULL CAT takes about 4 hours to complete, so make sure that you've set aside enough time to take it in one sitting. Once you have those scores, you should report back here and we can come up with a study plan.
I'd like to know a bit more about your timeline and goals:
1) What is your goal score?
2) Do you know which Schools you plan to apply to?
GMAT assassins aren't born, they're made,
Rich