Exam

Complete your B.Sc course and then you should opt for another exam.

I think you should visit the university or college website. There you will get accurate and every information you wish to seek.

You have to fill their form first and then appear for JEE Mains paper 2.

Go to this link and download the advertisement for system analyst. The advertisement consist of full details about eligibility, syllabus and selection process:
https://upsc.gov.in/

Hello Dear,
UPTU overall rank is considered at the time of admission.

Hello Ojaswin,
For COEP about 99 and above percentile is required for open category candidates.

You can consider following colleges:
VJTI, Mumbai
Sardar vallabhai Patel college, Mumbai
Walchand college, Sangli
COEP, Pune
ICT Mumbai
D. J sangvi college

Hey,
Use this link to get exact information about the college available to you.
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor

Your domicile is actually construed from the address on your 10th, 12th certificates and other Id cards you provide.

50% marks at graduation level is the minimum requirement for seeking admission in MBA. Since you have only 46% are interested in MBA I am of the view that you should start working on a job and after 3 years of work experience enrol for a distance MBA, part-time MBA or executive MBA.