Hey!
Congratulations on the interview invite!
I would say that a partner interview tends to be a hybrid type that emphasises your overall judgment and fit to the firm.
A few pointers that might help (from my experience with partner interviews):
- Technical questions, if any, will typically be quite high-level (e.g. spotting issues, weighing up risks, or explaining how you would approach a problem), rather than detailed law. It might help to practice strengths-based questions or scenario questions (i.e. "What would you do if..."), as these are likely to come up.
- There is usually much more emphasis on your motivations and commercial awareness, rather than competency questions (though there may still be a few of the latter) - e.g. why this firm, why law, and why you.
- They are often interested in how you think and communicate, rather than whether you know the "correct" answer. As long as you can explain your thought process in a clear way, you should be able to tackle any question (even if it is slightly unexpected!).
- I'd generally expect a more conversational style - the partners could probe your answers (which is completely normal, and doesn't mean you are wrong!), ask questions about your legal career / education so far, and discuss their own work at the firm.
If you can clearly explain your reasoning and show curiosity about the firm's work / clients, this should be exactly what they are looking for. Ultimately, you want to show that you are genuinely motivated to work at this specific firm, and that you would be someone that is great to work with.
I hope that assists, and best of luck with the interview!!