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If you want to do MBA, I would suggest you to go for full-time MBA because that will provide you more job opportunities in future.

You need to move ahead according to the instructions, but in most of the cases, you don't need to do that.

Its better to go for regular course if you are pursuing 1st time degree in your career. Criteria depends on the university. Generally, passing 12th class is the basic one for getting admission into any college.

Yes, you have to apply for VITEEE exam then only you can get admission into college for B.Tech and M.Tech integrated course.
For more details visit the link provided:- https://www.shiksha.com/b-tech/course/integrated-b-tech-m-tech-in-software-engineering-vit-university-vellore-chennai-campus-vandalur-243304.

CLAT, AILET and ISAT are conducted for the admission of law programme in the central universities. CLAT registration is closed now since the date was only 31 March 2018 but you can register for remaining two exams. For AILET the date of closing is 14 April and for the ISAT exam the closing date is 4 May 2018. Many private UNIVERISTIY conducted their own entrance exam for the admission in the law programme. So for this you have to check k on your own in the official website of the colleges for admission

Which NET are you are talking about?

No, not the demand draft but you'll have to mail the certificates.

Hi,
You need to have minimum 50% and mandatory computer Science as a subject in 12th to pursue B.Com (computer application).