I don’t think it can be different from a standard final round interview. The structure for a final, as for a first round, is always:
- Fit questions
- Your questions for the interviewer
However, compared with a first round, in a final round there is far more emphasis on communication and fit.
Specifically, the main difference you will find in a final round with partners is that at that stage they:
- Spend more time on fit questions and your alignment with the company
- Check more closely your communication (eg how you react to challenging questions)
- May not have a “proper” structured case to present – during my final at BCG I had one interview which was made by two market sizing questions and a brainteaser, without any business case. That's because at the final they know you can structure and crack a case (you passed 1 or 2 rounds already) and are more interested in your logic, personality and fit with the company
So in order to prepare I would concentrate on:
- Review in details your PEI stories – they will matter more than in the first round. In some finals I had almost exclusively behavioural questions.
- Work on your communication (reaction under pressure, how gain time when you do not have a structure ready, connect with the interviewer, etc) This is something you can do almost exclusively in interviews with peers. Your communication will be far more important for the final compared to the first
- Prepare on cases as you did for the first round. More market sizing practice could be useful to think out of the box if you get unusual questions.