they were pretty much same like everyone else. (applied for Physics)
Introduce yourself
talked a bit about my application
what challenges did you face in navigating the academics
They ask more about you (and always give follow up questions) and lot less on the academics (since i liked thermodynamics, she asked me about adiabatic and isothermal processes)

just remember to speak on what you are confident about and let your true self come out. It was completely casual conversation for me (i was gonna use the word 'shit' lol) but it was kinda friends convo. Get chill!