Dear student,

If you got allotted any seat in josaa counseling, then you will have the option to freeze, slide or float your seat. It doesn't matter that you get your first preferred college or your last, in either way if you got any seat then you must have to slide, float or freeze it.
Also note that for any preferred choice of college the freezing of seat will not automatically happen, you have to do it manually. And if you didn't take action after the seat allotment then your seat will get cancelled and you will not eligible to participate in further josaa rounds.
So freezing will not happen automatically even if it's your first preferred college or your last preferred college.

Also check out the following link to know our josaa 2020 counselling :-
https://engineering.careers360.com/articles/josaa