The default reaction to an interview invite is to go into performance mode. Rehearsing scripts, memorizing answers, basically turning yourself into a robot version of your application. That's the wrong instinct.
The interview is a conversation with a purpose. Not a quiz. Not a case study. Not a chance to recite your resume out loud. The purpose is simple: are you the person who wrote those essays?
That's it. That's the core of what they're checking.
Before we go any further, let's talk about what getting an interview actually means. Not everyone gets one. Most top deferred programs interview roughly 1.5 to 3 candidates for every available seat in the class. If you got the invite, you've already cleared the biggest filter. You're past the resume screen, past the essay read, past the test score threshold. The school looked at your full application and decided you're worth 30 to 60 minutes of someone's time.