CAT

You need to have a graduate degree atleast to take CAT. The procedure consists of a) the CAT exam b) if you clear the cutoffs, you then have the WAT/PI round, which is the final round. The registration forms open around September/October. You should,however, keep checking for updates as the the dates are not the same every year. Minimum scores are different for different colleges and will depend on the weightage being given to them in that particular year.

This year the cut-off for PGDM is 90 percentile, PGDM (BFS): 83%, HR : 85%. Package is same for fresher's. However, few companies give somewhat higher package to students with work experience.

Admission depends on your performance in PI but you can definitely expect a call.

Yes, you should get a call. However, the criteria varies from college to college.

With 62% in graduation chances are less. This is because colleges generally keep a criteria of 70% throughout for shortlisting.

The difference between them is that CAT is acceptable in almost all B-Schools including IIMs. CMAT is only acceptable in colleges and universities which are approved by AICTE and has both Engineering and MBA courses. CMAT was launched to make all engineering colleges under one course.

Yes, provided you have at least scored 50% marks or more in your 10th, 12th and graduation. Also if selected for the interview rounds, you need to provide them with a valid explanation about those low scores (if asked).
Good luck!

Hi.
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https://www.shiksha.com/how-to-crack-cat-find-answers-to-some-of-the-most-common-questions-on-cat-article-4226-1
Please visit the above links to know about cracking these exams.
I hope it helps.

Join any CAT coaching center and get your basics cleared. After going through the basic reading materials, you can graduate to more advanced practice by going for more advanced time based sectional mocks. Do understand that CAT is a test against time also. Just having the right know how is not enough to clear CAT. Hence, practicing mocks is the most crucial part of CAT preparation. You can personalize this strategy according to your strength and weaknesses.

You need to score a minimum of 85 percentile in CAT exam to get a call from FMS-BHU. Yes, it's a good institute for MBA with good ROI. MBA from IITs is cost-efficient. You can expect good placements too.