Riot Games interview questions

After a short sanity interview with their HR department I had a fairly easy technical screen focusing on my core C++ skills and basic design. This was followed up with a second phone screen with a Senior Engineer that delved a lot deeper and was more challenging. This interview went through knowledge of programmer practice, code, design patterns, etc. Passing this led to a full day in person interview, which was a series of talks mostly with people in the same department on the relevant skills (lots of white board problems) but with a significant set of interviews with people from other departments. The culture at Riot was obviously that of a young company, with lots of jokes but clearly everyone got along quite well. The technical interview was quite challenging, and went into large depth of low level knowledge as well as big picture design; it was easily the most challenging technical interview i've had in person, but never felt like a barrage of trivia questions and when I didn't know the answer was encouraged to take a stab at figuring out how I might do it.