Microsoft Sr. Software Engineer interview questions

Average difficulty interview. The first 2 were technical interviews that involved coding. The interviewers were helpful in trying to push in the right direction by giving hints and set a positive atmosphere throughout. The interviewer in the third round could not express well of what he wanted. He said high level design/implementation of the game of battleship. I started with a matrix implementation. Midway he said he did not communicate properly but instead wanted a different approach like a list of position objects. From there the whole discussion went downhill. There was a lot of random unconnected conversations and I could not understand what he was expecting as the final output. I got rejected after this round as expected. It would have helped if there was a clear expectation of the end result from the interview discussion. It felt like an hour of random unconnected and ever changing conversations.