Hi Arjun,
JoSAA 2020 is being conducted in six rounds. The seat allocation result of JoSAA 2020 will be released in online mode for every round.
This depends on you, the sooner you get the college and the subjec of your choice, you can opt out of counselling.
If you are satisfied with the seat allocated ,you can accept it. That will be taken as freezing an option. So it depends on your choice and the seats left in the college of your choice.
For more details, check our QnA page :
https://engineering.careers360.com/articles/josaa-faqs
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile