Hello aspirant,

hope you are doing good.

You will get seat allotted in polytechnic college after writing polytechnic exam based on your rank after the  completion of counselling. seats in IIIT are allotted based on the percentage of a student got in their SSC. If a student got good percentage like above 95% then they can apply for IIIT, there will be chance to get seat in IIIT. or else you can join in inter in any course based on your interest.

admission into IIIT is based on the SSC percentage so you cannot join by writing polytechnic exam.

hope this will be helpful