GMAT

Hello, exceptional students without work experience are considered. However you need to be an extraordinary brilliant student. Remember you would be competing with applicants with significant work experience and more competitive profile than yours. So, if you don't have anything unique in your profile you won't be accepted.

Hi,
Any top ranked university will ask for the GMAT but few options may be available. You may check for graduate certificate programs or PG Diploma programs.

Your work experience is okay. GMAT score could have been a little high. XIMB is a good college. We have good placement record and faculties are good

CMAT will do. Rest, you can check on www.ibsindia.org for more details.

Yes, shortlist based on scores and then GD - PI.

You should start preparing for GMAT right now. It takes a lot of time for practicing and if you are planning MBA abroad. Although GMAT score is my sole determinant for admission, you need to have 730+ score if you want to get admission into a good institute
A 700 GMAT score puts a test taker in the 89th percentile of those who have taken the exam. That means only 11% of those who sit for the GMAT have a score of 700 or above. Hence you need to work and practice hard, take mock test, etc.

In Globsyn Business School you require a minimum of 50 percentile for both the entrance exams.

First, you join good institute near you like TIME, IMS, Career Launcher, etc. So that you get a better idea of how to solve Questions Papers, Basics, Tricks, etc.
But just joining an institute is not okay.
You have to work hard, keep practising maths problems, logical reasoning, English grammar and all.
As you said, you are in the 2nd year so first, you have to focus on your graduation that is also important, start preparing for CAT in last year or I would advise you to after B.gain 1-2 years of work experience after B.Tech and then go for MBA as it would be better for your admission and placements.
Best of luck.