after sliding i josaa if my brach does not upgrade will i get my previous seat or it will also be rejected??
Floating/Sliding simply means rejecting the college you got in the counseling by not registering with it, though if you float a seat you'll remain eligible to get a seat in a college or branch of your choice in the next session but the seat provided no longer remains an option as it is made free by you and would be provided to someone else.
Hope this might help you.