Microsoft Intern interview questions

I was contacted directly early in the intern recruitment season by Microsoft, as a friend who was previously a Microsoft intern put my name down as a good possible fit. Flown straight to Seattle for final round interviews after a brief 15 minute phone interview. Four interviews in total, each lasting about one hour. Was for the embedded systems department. Group of interviewees were given their decisions immediately after interviews finished; a little awkward being in the "loser" group.

First round was purely algorithms and their improvisions. Did well in this round. Questions ranged from sorting to graphs to searching. Second round was interview, asked me to code and design algorithms, didnt do well, so couldnt go ahead