There is usually no interview process, you just need to show your capabilities when taking courses, showing up in classes and office hours is very important. Try to learn as much as skills related to your major as you can and be flexible
Super simple interview with professor, explain what you are interested in and how you can help in his work.
Might need to prove your skills with class projects and work. pay is fine, good experience to use on your resume
Acudí a una entrevista en SUNY Buffalo (Buffalo, NY)
Entrevista
It was based on past experience.So if you know your stuff you are good to go. now i am working as a graduate research assistant for a professor at state university of new york, Buffalo.