is josaa having major changes in opening and closing ranks every year for nits
No, the closing ranks for various colleges do not vary drastically. Even this year it will follow the same pattern as per the previous years.
But after JoSAA counselling there are two special rounds conducted by CSAB. In this, the closing ranks for various colleges change heavily every year and cannot be predicted exactly. But till the six rounds of josaa, it will remain somewhat similar to the past cutoffs.
You can check out the link below to explore colleges according to your jee mains rank.
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer