NIT

With a 1,27,245 rank in OBC-NCL, getting CSE in any NIT or IIIT is very difficult. CSE seats usually close much earlier. You might get other branches in newer NITs or IIITs. Keep an eye on spot rounds or consider private colleges if you're focused on CSE.

With 91 percentile in JEE Mains there are various good colleges options for you which are mentioned below. You can have chances in Top NITs like NIT Srinagar, NIT Trichy, NIT Agartala which is difficult for you to get Computer Science branch you can make sure your admission to NITs with Computer Science Engineering branch in NIT Patna NIT Durgapur NIT Mizoram NIT Sikkim NIT Raipur. 

With EWS rank of 68741 and CRL rank of 515714 you can not get a IIIT however you can get NITs like NIT Patna NIT Durgapur NIT Mizoram NIT Sikkim NIT Raipur and NIT Goa because they have relatively lower cutoffs than Top NITs like NIT Trichy, Warangal, and NIT Srinagar and NIT Bhopal. You can also look for government funded technical institute like Assam University Pudducherry Technological University.

With JEE Mains SC category rank of 27000 there are various good colleges options for you which are mentioned below. You can have chances in Top NITs like NIT Srinagar, NIT Trichy, NIT Agartala in which it is difficult for you to get Computer Science branch. You can make sure your admission to NITs with Computer Science Engineering branch in NIT Patna NIT Durgapur NIT Mizoram NIT Sikkim NIT Raipur. 

It's very difficult to get into Top NITs like NIT Trichy, Warangal and NIT Bhopal because these NITs generally have high cutoffs and competitive ranks with 95 percentile and rank 75689 it would be difficult if you are from general category but there may be chances if you are from reserved category like SC and ST category. With this percentile and rank you can surely get a low ranked NITs like NIT Patna, NIT Durgapur, NIT Mizoram, NIT Sikkim, NIT Raipur, and NIT Goa.

No, it's not possible to get any NITs even the low ranked and low cutoff NITs with JEE Mains Crl rank 288000 and OBC rank 101000. Don't expect any admission in any NITs through your JEE Mains rank. However you can apply for admission to other colleges who accepts admission based on the merit scores or offers direct admission.

With JEE Mains rank 32255 and belonging to SC category there are less chances for getting any IIITs because of their high cutoffs but you may have chance to get into low cutoff IIITs like IIITs Bhagalpur, Kottayam, Ranchi, and Nagpur but you won't get Computer Science Engineering branch into IIITs. For NITs you may get NITs with low cutoff ranks like NIT Patna, NIT Durgapur, NIT Mizoram, NIT Sikkim, NIT Raipur and NIT Goa.