CAT

Dear Monika,
You can start preparation simultaneously. You need to do hard work to get good percentile. You will be selected for best institutions for management course.
All the best.

You should atleast make percitile above 95

Only a graduated or final year graduation student is eligible for give CAT Exam

Dear,
CAT 2016 exam will be conducted by IIM-B on December 4, 2016. The application form of CAT 2016 will be made available from August 8, 2016 (Monday).

Dear Pronoy,
IIM Bangalore has released the notification, as per official notification, CAT 2016 will be conducted on December 4, 2016.

You need minimum 50% in UG, but if you score high, then you can attend high quality company's placement and for IIM -A, B, C, you have to score over 98 to 100 percentile in CAT.

You can appear for exam like IIFT, I think in India no other college is as good as IIFT (Indian institute of foreign trade) for international business.

You need to score high in CAT exam. You score should be between 85 to 90 percentile, then you are eligible to apply in top colleges. For IIMs, you need over 95 percentile.

Hi,
You should complete your BBA first because maintaining CAT along with your studies is hard as both are entirely different.
I would suggest you to take 1 year after graduation and devote your time for CAT preparation by joining regular batches in CAT coaching institutions like, TIME or Career Launcher as they provide well prepared study materials and also provide mock tests.
By doing so, it will increase the chances to get score and a call from any IIMs.

MAT is easy, but there are only 1 or 2 colleges, which accepts MAT score.
All the best.