What to expect MSFT onsite for Data & Applied Scientist?

Have onsite with MSFT next week for Data & Applied Scientist. Looks like Senior level based on req, have PhD+5 yrs. Interview lasts from 9am-5pm with 7 sessions total!!! I have a ML background. What else should I prepare? Coding? What LC difficulty and what data structures will be tested? Do they ask stats, probability, A/B testing questions? That's not my expertise but was wondering if they will ask generic DS questions. Do they test SQL and database stuff? I also don't do much of that and use pandas for my work and my expertise is not really database management. Position is not BI related which is where I hear SQL gets tested more? Thanks!