GMAT Pattern

First, You should have syllabus with yourself and then read the preparation tips of the toppers. Then make your preparation plan according to your convenience and arrange the study material which will help you to plan and after few months start solving previous year papers.

It all depends on you if you are a hard-working student and intelligent then a year is sufficient for these exams.

According to my knowledge for MBA in any IIMS, you need to give CAT exam there is no IIMs who except GMAT score.

Firsrly, its important to have a clear structure for your study hours. If you think that you'll only be able to concentrate on a single section for an hour or two, then adjust your study plan accordingly by factoring in a break, or a change in your area of focus. Using practice tests is a tried and tested way of tracking your progress, and a handy way of highlighting any weaknesses in your strategy that you might not be aware of.

Hi Raghavan,
The scores are good, it will depend on your overall profile now and your non-academic profile. If Harvard sees you fit as per their admission process you may have a chance. You must not only have good academics but must be an all-rounder and contributor.