Hello Student,

First of all you need to know that JRF/NET is a certification exam only and further it totally depend on the institute to which you want to pursue your Ph.d . So It will be difficult for us to predict either you need to go through a written exam or an interview .

As the procedure vary institute to institute and branch to branch . So in order to get a clarification you should try to contact some faculty or student there.

Hope it will help you!!