There wasn't really one, they ask you to do a cut and colour so make sure you have a model, and then they ask about your availability and that's it
It's good to do some research about the company so you get an an idea of how big RUSH is and how quickly it is growing.
You have to be able to work quickly and manage a high volume of work, so prepare yourself to give evidence of where you have done this.
Read the website for history, marketing and client reviews.
Vey laid back no preparation needed