Hey.

Freeze candidate means whatever college you have got in the first round you are satisfied with that and you are ready to join that college amd if you fill up-gradation  form and chose for floating that means you are not satisfied and you have applied for second round in search of a better college . NOTE: WHILE GOING FOR SECOND ROUND PUT YOUR FIRST ROUND ALLOTED COLLEGE IN THE CHOICE LIST OF SECOND ROUND SO THAT IN CASE YOU DID'NT GET A BETTER COLLEGE IN SECOND ROUND , ATLEAST YOU WILL HAVE A SEAT SECURE 

Hello student , thank you for asking the question i would also like to know the answer as well .