Hi rajapavan4444,
While it might be tempting to try to break the GMAT down into 'sections' during your studies, trying to measure your progress by taking individual sections (outside of the context of taking the Full Exam) is NOT a realistic way to prepare for the GMAT.
If you have not yet done so, then you should plan to take FULL-LENGTH CATs/mocks at regular intervals (since there are Test-taking skills that take time to develop, but that can really only be learned by taking FULL CATs over time). To properly prepare for Test Day, you also have to make sure to take your CATs in a realistic fashion (take the FULL CAT - with the Essay and IR sections, take it away from your home, at the same time of day as when you'll take the Official GMAT, etc.).
There are a number of reputable sources for FULL-LENGTH CATs. Before I can offer you any additional advice, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) How long have you studied?
2) What study materials have you used so far?
3) How have you scored on EACH of your CATs (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
4) What is your goal score?
5) When are you planning to take the GMAT?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich