No interview required, so it was really easy. Only have to submit paperwork (tests, essay questions?, letters of recommendations), and if pass the screening, get offered a position. At least for my department (physics), will then be given the opportunity to come to the open house, where they try to convince you to attend Ohio State. Basically, a few days of tours, free food, and getting to know the faculty/ other students.

You submit your application and then if accepted, you interview them. Not at all like industry. The key is finding a professor you like. There are no questions in the interview, it is more like a talk about what you want to research and your interests and goals. You just to have apply online and have a good resume with good grades and undergrad research. It is nothing like applying for an industry job.