Can apply via school. They may have the connection with your school. Please ask the school for help if you are not sure about the program. Or you can just google for the answer.
I applied through university. I interviewed at Simtech in Oct 2015
Interview
Skype interview with PI and co PI. It is a friendly chat. They are very knowledgeable as well.
The interview is about 20 minutes. They also gave more information regarding the project, which is quite helpful.
Interview questions [1]
Question 1
Self introduction and knowledge regarding the research topic.