Hi, there were many disputes going on about NET exam but, at the moment NET is only considered as an eligibility criteria and not as an screening process. So, in short No, there won't be any exemption for student who appeared for NET exam. Coming to interviews, they can last from 30 minutes to an hour depending on the interviewer as well as the candidate. The first 15 minutes are for your presentation on yourself. Rest is about your papers and academics. Hope this helps.