The follow-up phone interview was 45 minutes in length, and began with a review of my code from the challenges. I was asked to run through how I came about my answer and how it works, then asked about its efficiency. An extension question was asked for each (how would I change my code to account for this new stipulation?). Then I was asked a handful of unrelated programming questions, most of which involved writing code (e.g. design an inheritance hierarchy to represent this real-life situation).
