for domestic collages --

you need to give CAT exam, and also have good marks in class 10, class 12 and undergraduate course

if you secure good percentile, and your CV IS good you will get a call from most prestigious indian institute of management.

for international collages--

1] gmat exam

2] toefl [ for english ]

3] ielts [ for english]

in all MBA collages WORK EXPERIENCE IS PREFFERED