Computer Science Engineering

HiA lot depends on your interest as you can give your best only if you are interested. As you have not mentioned clearly your last qualification, I would suggest that you can go for a B.Tech after your XIIth class for a successful career and then either go for a job or M.Tech and research or you can

Not sure about the B.Tech CSE but you can tryout the following Colleges.
1, Centurion University of Technology and Management, Visakhapatnam
2. GITAM University, Visakhapatnam.

First of all, BIT-Kolkata extension centre doesn't offer M.Tech and for getting admission in the main campus in M.Tech, you will need a valid GATE score.

It all accounts to one thing, don't expect an average placement of more than 3.5-4 Lacs. There were some of the companies that visited campus during the year 2017. PwC, EY, SAP labs, Musigma, Amazon, ThoughWorks, Hitachi Consulting, Samsung R&D, Dell India, HSBC, Huwei Technology, Zoho Corporation,

Yes, you are eligible to do MS in computer science. You can apply in any university based on the your eligibility in the tests.