Just score above 700 on the GMAT and gain some more work experience before applying. Given IIM Calcutta's strengths in Finance, it should be a great career move for you. Who knows you might land up with a big i-bank or advisory firm.
Interviews - just know why you want to do an MBA, and how your background coupled with an MBA will help you achieve your career goals. that should be enough! you should also be able to demonstrate your personal and professional accomplishments to the interviewing panel.
I am a chartered Accountant and having more than 5.5 years of experience.
I have worked in manufacturing sector for 4 years and currently working in education services industry as a part of corporate finance team.
I would like to know the following
1. What GMAT score will enhance my chance of getting selected?
2. What i should keep in my mind at the time of interview to get selected?