One hour take home coding challenge. They care about time and don't want you to exceed it. They grade you on correctness, design, readability. They are pretty communicative about what you did wrong.

I was contacted by a recruiter who did a quick phone screen with me. I was then given the choice of possible interview times for a technical interview. The technical interview was the first of its kind that I've ever done. I tend to avoid companies that whiteboard, but the opportunity seemed too good to pass up. I was given about 30 minutes to answer an algorithm question. After implementing a solution using recursion I was beginning to explain why it was not the ideal solution and about to iterate on the solution to something better we moved on to the second part, a system design question. The interviewers asked some leading questions that I think weren't the best for me personally, because it moved my thought process from taking more meticulous systematic step-by-step approach to sort being all over the place, because I would want to try to finish the thought I was having before being lead. After the interview, I requested feedback from my recruiter, who was happy to share notes from the interview. All in all, an informative process and good practice for future whiteboard interviews.