Ph.D

Yes. You can do PhD after M.Tech in food technology.

Amity University, Noida campus charges Rs. 33,500/-per semester for the part-time course.

You will find the sample papers here:
https://www.google.co.in/amp/s/www.shiksha.com/university/tezpur-university/exams/amp/tuee/question-papers

Hi,
The top ranking universities are usually the best research universities including Harvard, Stanford, MIT, Oxford, Cambridge, Sup Biotech in Paris, Trinity College Ireland, RWTH Aachen, Karolinska Institute, Kyoto University Japan and many more.

Hello,
I don't think you can pursue higher studies after a course from III. I further request you to ask and consult your faculties for further options and ways.

It depends on what you want to do in your career. If you want to do scientific research, Ph.D is a must. If you want to work in a company or handle an engineering project, both Ph.D and Master's degree are influential. If your work is related to research and development, Ph.D is better since it equips your mind with skills to do scientific research. That being said, a Master's degree is also accompanied by research, but the intensity of research is definitely a lot more in a Ph.D.