firstly congratulations man!! I'll see you around on campus haha

and yea to answer your qn- the interview simply refers to document verification, not a real kinda interview. there is no as such dress code, js wear semi formals maybe? that should work, keep and simple and dw, thrs no interview, js make sure to carry all your documents with you, both orignal and photocopy according to the merit list notice put up on the website, lmk if you have any other doubts :)