Candidate can apply for JEE Advanced without knowing their AIR. JEE Main Official Cut Off Score for appearing in JEE Advanced are available HERE. If your marks are above the cut offs marks you are eligible applying for JEE Advanced Exam.
Candidates who secure an All India / Category Rank in JEE (Advanced) 2015 are eligible to appear for AAT in 2015.
Its compulsory to PASS in the Architecture Aptitude Test (AAT) for B.Arch admission in IITs.
IIT will release the minimum cut offs for AAT exam, cndidates securing marks above the cut-off. There is no separate ranking in the AAT.
For more information on JEE Advanced Click Here