Hi Sunil,
Since you posted this in another Forum on this site, I've pasted over my response from there:
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 spend a little time familiarizing yourself with the basic content and question types that you'll see on the GMAT, then that's fine, but you shouldn't wait too long to take that initial 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.
While the books that you have should provide you with plenty of practice problems, no book can completely prepare you for the computer-adaptive GMAT. Many Test Takers who use a 'book-heavy' study approach end up getting 'stuck' at a particular scoring level, so it's possible that you might eventually need to invest in some new non-book resources.
I'd like to know a bit more about your timeline and goals:
1) When are you planning to take the GMAT?
2) When are you planning to apply to Business School?
GMAT assassins aren't born, they're made,
Rich