Hello sharan. 

To get seat im AAT exam i.e Architecture Aptitude Test, only those candidates who have qualify JEE Advanced Exam are eligible.

So it's not quite easy to get the seat for AAT exam as you must have qualify the JEE Advanced exam. 

Here I'm also sharing you the link which will give you all the information regarding AAT exam. Please go through it. 

https://engineering.careers360.com › ...

Web results

JEE Advanced AAT 2019 - Registration (Started), Eligibility, Application Form ...

Hope this will help you!! 

Good luck