Engineering

You will definitely get a good NIT but I can't tell what exact college you will be getting:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor
You can use the above link for predicting the college.
Best of luck.

Don't worry.
The fees for OBC category is a little bit lower than a general category. Also, you will get very good marks. Congratulations for it!
You will definitely get a college since the cut-off for OBC is just 45. You can appear for the scholarship exams and there are many schemes also for scholar

To obtain a career in cyber security, you should join engineering and you should choose computer Science engineering. As there, you will learn a lot of things related to cyber security and you will get good job opportunities.
Good luck.

Yes, B.Tech food technology is the best in country like as it has so much scope and food technology is the area were no recession occurs. This course deals with various applications of food Science like preservation, distribution, processing, selection, packaging, etc.

First of all, prepare for the entrance exam your performance in that will decide which college you'll get, best ones of engineering in India is IITs and NITs for that you have to write JEE.
All the best.

Yes you can get admission in private colleges in B.Tech, but some of them have different exams like VIT, BITS, SRM, etc. So you would be required to submit the application forms. Keep checking their last dates for further details.