Hi Nitisha

AAT is Architecture Aptitude Test which is conducted by IITs for admission in Architecture brnace in IITs.

To study architecture in IIT you must qualify JEE Main as well as Advanced. Only then you can appear for AAT.

But if you haven't qualified JEE Main, you can appear for NATA for studying architecture in other cooleges.

Hey Nitisha!

Sorry to say but only the candidates who qualify JEE ADVANCED exam are eligible for giving Architecture Aptitude Test(AAT) .So ,qualifying only JEE MAIN PAPER 1 is not sufficient for giving AAT 

Feel free to ask any further queries!