Tamil Nadu

No, the rank in NIRF is same for Sastra, Thanjavur and Kumkakonam.

Yes, you will be able to get a seat in computer science. You will fall in category 2. You have to attend the counselling on the assigned date. I would also suggest you check your emails regularly. You will get detailed information through emails only.

Score should be in the range of under 1500 approximately then you are eligible for CSE.

Hello Harsh, you have really good chances of getting CSE at VIT, Vellore with this rank. But the competition is too high and hence it is difficult to say whether you can get it at the first round itself. Hence you can try your best at the counseling. All the best!

For which stream you are interested to take admission?

You may not get, as biotechnology gets filled in quickly, you may wait and choose other possibilities.

Yes, there is chance of getting admission there as there is low cut off for EC.

Please visit this link. This is a college predictor by Shiksha and I hope this will help you to choose the right college-
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor&ved=2ahUKEwie-7mvrITiAhWz73MBHYuID8oQFjAAegQIAxAB&usg=AOv