Institute of Engineering and Technology (IET) Dr. A.P.J. Abdul Kalam Technical University Lucknow Answered Questions

Please specify the entrance test in which you secured this rank, so that I may be able to populate relevant details. If you are talking about the UPSEE, use the predictor tool mentioned at the link provided below to predict your chances to secure admission in this institute.
https://www.shiksha.com/b-tech/course/b-tech-lateral-entry-institute-of-engineering-and-technology-iet-lucknow-194214

With an OBC rank of 2435 your general rank would be in between 10k-12k (a simple guess), I'm sorry to say with this rank getting into IET is next to impossible so don't hold any false hopes you can get into JSS and here also getting CS and IT would be tough for you.
Getting any other govt college is also difficult and even if you get one you might end up in not so favourable branch.
At last, what I would suggest is that if you have a one more chance in JEE MAINS then go for it because believe me giving another year to study is worth regretting about the college you would be with this rank to make myself clear try avoiding AKTU.

Congratulations on your excellent rank in UPSEE. Yes, you can easily get IET-Lucknow in computer Science in may be 2 round or 3 round of counselling. Do regular visit to official website of UPSEE counselling, for further updates about the counseling dates. Do like if answer is helpful.