I talked with Dropbox engineers at a career fair and submitted my resume online. I received the OA the next day.

After I finished that, I was reached out to by a recruiter to schedule a first-round phone algorithms interview. After that, I interviewed with my recruiter for another round of behavioral questions.

Then, I finally went onsite for a whole day. There were two interviews back-to-back in the morning, lunch with an engineer who would provide feedback later, and one more round of interviews in the afternoon.

They asked me to implement subdirectories for the file system.