I conducted interviews at Amazon. Sadly, most of the time that question was about measuring the ability of the candidate to do object-oriented design at all. Us

I conducted interviews at Amazon. Sadly, most of the time that question was about measuring the ability of the candidate to do object-oriented design at all. Usually we didn't care what the final data model looked like, so long as it was logical (and much more often than not, it wasn't) - and we gave candidates every opportunity to explain and justify the classes they designed. But you are correct in that Amazon loves OO, and functional or other approaches wouldn't have been looked at favorably.