Thanks for your response. It feels like something ‘impromptu’ situation base case interview. I am planning to follow a generic approaching in that case: analyzing the problem, decomposing the issues to find the root cause, plan the solution and outline (may be a block diagram) the implementations. I hope that would be enough. I assume the interviewer would be there (‘as a business customer’) to provide more details where the case requirement is not very explicit. Is this the case? Also is there any formal presentation (powerpoint/white boarding sort) involved as well?
I just need to plan how much we can cover in 30/40 mins. It feels a bit less time to present a proper solution, e.g. an architectural artifact.
Thanks in advance.