Hello Aspirant,

Seat allotment is done on the basis of the availability of seats, merit and preference entered. However, before the actual seat allotment, mock allotment will be done in two rounds. This will allow candidates to know the seat allotment process and also enable them to know and choose better preferences for themselves in the main rounds. So yes, you can opt for the higher preference seat during the main seat allotment. 

Once the seat is allotted, candidates will have to choose any one of the following options :

Freeze– If you are satisfied with the seat allotted to you and do not wish to participate in further rounds, you will have to choose this option.

Float– In case, you need to keep the seat allotted and also wish to upgrade your seat, you must follow this option.

Slide– If you accept the seat allotted and wish to upgrade the course in the same institute, you will have to stick to this option.

You may visit https://engineering.careers360.com/articles/jee-main-counselling-seat-allotment for further information regarding seat allotment.

Thank you.