IIIT

Here is their official website link with some helpful information, https://www.iiit.ac.in/academics/postgraduate/phd/. If you wish to get professional help in studying PhD abroad, visit http://shelldreamsoverseas.com/. They are best PhD consultants in India and can help you get maximum benefits from studying PhD abroad like 100% scholarship, handsome stipend while studying and also tuition fees waver. You can call them on Ph : +91 79 4006 7258 M : +91 99980 23693 +91 99980 23694

IIIT HyderabadIIIT AllahabadIIIT Bangalore
IIITDM Jabalpur IIITDM Kancheepuram.

You should visit
josaa. Nic. In
There you should see the previous year's cutoff's and compare your AIR of JEE Mains for your Homestate NIT first and then for different colleges.

Yes, you can get lower IIITs in CSAB round.

No (as per the last year's statistics). But many seats were left empty last year, so you may try to get a seat if you're lucky enough.

I think it very difficult to get a seat but if the luck is on your side you might get.

Sorry, but all NITs are mostly restricted to a CRL of below 60k at maximum. Above these, ranks are meant only for people to get eligible for Advance exam. With these, try to get into Private Universities or Colleges or Take a year drop to improve the scenarios. Thankyou.

JEE Mains 2018 College Predictor
Use your JEE Mains 2018 rank to see where you can get admission at the link provided below:
See the courses, colleges & rounds you may crack
The result is based on admissions data of JEE Mains 2017
Get resources & insights on colleges & courses
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor.

Yes, you can get NIT for ST category.