Hi Ayush,

You would get seat in CSE branch in Good college or not is totally depends upon whether you belong from ST,SC,OBC or General category.if you belong from ST or SC then only you may get seat in any NIT but not in Top NITs and if you belong from OBC or General then you cannot get CS in any NIT.

you can check for the cut offs of NITs  for CSE branch on the link given below:-

https://engineering.careers360.com/articles/nits-cutoff-for-btech-computer-science-engineering

Hope this will help,please feel free to ask if you have any further queries.

Thank You.