MBA/PGDM

You can do MBA after any Bachelors degree. You need a minimum 3 years Bachelors degree to get eligible for MBA. The subject you should choose depends on which undergraduate course you want to pursue, if it's B.Tech then you should choose PCM in 11th, if it's BBA then Commerce and so on.

Hello!
JBIMS accepts only CAT, CMAT, and CET for the admission of its MMS program. So, you need to give at least one of these three and score really well to stand a chance of getting admission.
Good luck!

Hello!
None of the top B-schools in Bangalore allow students by just giving the MBA entrance exam; they conduct their own interview rounds for giving admissions.

Hello!
Some tips which would help you in scoring well in any MBA entrance exam:-
1. Be thorough with the basic concepts.
2. Practice a lot to get comfortable with the various difficulty level of questions.
3. Read newspapers to be aware of the current affairs.
4. Focus on the tips, shortcuts, exam-taking strategies, etc.
5. Improve your mental calculations.
6. Solve an ample amount of mocks and analyze them well.
7. Go through last years' papers/questions for better understanding of the exams.
8. Lastly, do not panic on seeing low scores; have faith in yourself and be optimistic.
All the best!

Hello!
None of the NITs accept NMAT scores for their MBA programmes. http://www.nmat.org.in/test-takers/nmat-by-gmac-accepting-institutions/ Kindly visit this link to know about the B-schools accepting NMAT scores.

Hello!
You can give other entrance exams as well like CAT, SNAP, NMAT, CET, MAT, etc as CMAT is not the only exam whose scores are accepted by the various B-Schools.

Hello, As of now, IIM Visakhapatnam has only one full-time PGP programme and no other programme. Though, there is a Fellow programme in Management which would be commenced next year onwards. http://iimv.ac.in/node/19201 Here is the source.