B.Tech

That depends on your interest. If you are interested in mechanical and took admission in information technology than that would be an absurd thing to do. I'd suggest you do what interests you and you are good at. But as per the placements, go for computer science sector or an IT firm. Even associate software engineers are getting a good package.

My answer is not on behalf or for the university in the question but there is one thing common to all as a rule, you can do a postgraduation in a subject that you have studied in graduation. However, it is not applicable in mass communication subject (PG).
For psychology and even literature, it is applicable.
Hence I shall say that mass communication or journalism is possible.

The fee structure of all the colleges is not same, but it is about 90K per year in most of the colleges.

Fees for B.Tech is 65 k per year.

Kindly visit this link:
https://www.shiksha.com/b-tech/colleges/b-tech-in-food-technology-colleges-hyderabad