Dropbox Software Engineering interview questions

Called for on campus interview after the Career Fair. 30 mins of the first interview. Typical DS questions. I solved it but they wanted juniors. Do your data structures very well.

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, and I wrote up the code on a laptop due to lack of a whiteboard, but the style was the same as whiteboard coding. A couple 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 in. I received an email less than a week later telling me that I would not be receiving an offer.