What are M&T interviews like?

For those who have had their interviews already, what are they like? How much do they ask you about core engineering/business ideas? how should you prepare?

Hi, fellow M&T applicant! I found this website that includes sample M&T interview questions: https://www.alumni.upenn.edu/s/1587/gid2/16/interior.aspx?sid=1587&gid=2&pgid=1235#panel6