I applied through college or university. I interviewed at Stanford University
Interview
Normally, directly give a presentation.
They will know your work and judge by the presentation, Many questions about your work detail. So be sure to very familiar your work.
Normally after presentation, the lab would have the idea of keep or not offer.
Interview questions [1]
Question 1
Some question that fall into the lab area but you might not very familiar. So should be very familiar their work and think what your work might contribute to the lab.