The interview process included:

• A HackerRank coding exercise
• A phone interview
• Full-day, face-to-face interviews at their offices.

I had a very positive experience. The interview questions were really doable, but I would advise preparation in algorithms, core Java (including concurrent packages), and data structures.

There was one slightly odd question where the interviewer really wanted me to say 'polymorphism.' He said something like, 'When we see lots of switch statements on type, we immediately think of...' (pausing for me to fill in the blank).

One thing I noticed was that all eight technical people I spoke to were young, white men. However, this is obviously a tiny sample size, and they do have some information about diversity on their website.

How would you implement a Concurrent Blocking Queue?