The process started with an initial screening by a member of the recruiting team. After that there was an interview with the hiring manager. After the hiring manager interview I was given a coding challenge. I was given a week to complete the challenge. I had to travel during this time and they were understanding when I asked to turn in my code a little later. The challenge wasn't terribly difficult but it was a healthy challenge and offered plenty of places to get lost in the weeds if you weren't careful. It seems I avoided too many missteps and managed move on to the next round of interviews.

The next set of interviews were with 5 different members of the engineering organization. Some were managers and some were developers. Each person had some basic questions relating to development at scale that I needed to answer. Each interviewer allowed time for my own questions as well. After these interviews they had a review and I moved on to the last step. At this point I had more or less passed all the tests and had an opportunity to meet with a more senior leader who let me ask questions about the business and its direction. Once this was done then the normal discussions regarding salary and I got an offer which I accepted.

Please explain the CAP theorem.