Here are some regular questions professors normally ask if you get an interview for PhD program.
1. Why do you think you are suitable for my research group?
2. What courses did you learn in you last year? And take one class for example, describe what you did in the class?
This is a actually the first phone interview in my life, and I was totally unprepared. The interview questions are good and not hard to answer. But without preparation, I did very bad. And of course, I didn't get admission to RPI.
What I should have done is quickly organizing the answer and clearly answering the questions. Anyway, it is a big lesson I have learned.
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