Hi Megha,

If you want to do MBA from a good college you need to crack entrance exam.

some the major MBA entrance exams are-

-CAT for all the IIMs, FMS and other premiere college. Need to score atleast 95 percentile above(Negative marking) to get a call from these colleges. registration starts mostly  in the month of june every year

- Xat for all the xavier colleges. Need to score above 95 percentile (Negative Marking ) Registration starts in the month of october or afterwards.

- Nmat for colleges like Narsee Monjee Mumbai. There's no negative marking. The exam will be off 2 hours 10 mins. To crack this exam need to score above 208 points. Student can give this exam 3 times in year right from oct-dec. 

Also you can prepare for other entrance exams like SNAP, IBSAT, CMAT, MAT and MAH CET.