Trending @Infosys; Need details on IJP for MERN Stack

Is anyone aware about the IJP process, specially for MERN stack in DX unit. I am little nervous as this is my 1st IJP and I am not sure what kind of preparation is needed. My interview is scheduled for Monday.

Partly I am nervous because I don't have that much knowledge on the MERN stack as I wasn't consistent and it's for 4.5 years. Any suggestions?