Salam
Probably, they are gonna ask about different things. It might go in different ways, but based on my experience, usually one of the talks and the rest might also ask questions. You are gonna be asked about courses you have taken, your exam scores, your research/teaching experiences, your motivations, your future plans, if your have any proposed ideas, what you have published (if you have any) and what you did and how you did it, and etc
Don't worry but be prepared
Good luck
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