I applied at a career fair and had a 30-minute technical interview in person the next day. The question was straightforward, asking to find the possible permutations of a string. I wrote up the code on a laptop due to the lack of a whiteboard, but the style was the same as whiteboard coding.

A couple of days later, I received an email to set up a 1-hour phone interview. I was asked how to find duplicate files in a filesystem, and I wrote up the code on Coderpad.

Another few days later, I received an email to set up an on-site interview. This consisted of three technical interviews, lunch with an engineer, and an engineering Q&A. The questions were interesting and a bit more challenging than your average interview. Be sure to be able to analyze space complexity in terms of bytes, not just Big-O notation. I don't think I can disclose the actual questions asked during the on-site, but they were all fairly straightforward and did not require fancy algorithm or data structure knowledge. While I did solve all the questions and follow-ups, I don't think we were always on the same page, and the interviewer had to nudge me in the direction they were hoping to go.

I received an email less than a week later telling me that I would not be receiving an offer.

List all duplicate files in a filesystem, given the root directory.