unless they change it for this year, the interview happens whenever. it just depends on your squad leader, what you're doing during the day, or if you seem to have some extra time at night. mine was just random on the second to last night. and it really pretty much is those basic questions, though i remember being asked if i understood what things like the honor code mean, or if i understood what challenges i would face and what it meant to go there. nothing to worry about, just reflect on the experiences you've had there over the days and let those help to shape your feelings and responses.