The interview consisted of four 1-hour technical problem solving sessions, a lunch with a current employee in a similar job, and a half-hour final close with a manager. The questions were difficult but fair, and they do have a high bar for passing (although that does not always mean getting everything exactly right). I've since been hired and have been on the other side of the interview process. My strong advice is to practice general technical problem solving, but DO NOT research the specific questions you may receive during a Pure Storage interview. If you have seen a question that comes up in an interview, be up front and honest about it. The interviewers have variations on each question for situations like this, and I have seen concern expressed when candidates appear to be too familiar with specific problems.