Dropbox Product Designer interview questions

The whole interview process was really fast, and started out with an half-day onsite interview where I presented my portfolio and solved a design challenge on the white board. Differently than most places I interviewed for, the 2 designers interviewing me actually helped me out during the exercise, simulating a real working experience. It was really cool. One week later I went for the last stage, a somewhat longer version of the first: I was onsite again and presented my portfolio for more people (around 6 or 7) and later had 1-1 where they asked questions about my projects, my career, experience and expectations for the future. The very last step was another white board design challenge, this one less abstract and more interaction focused. Overall I loved the experience and meeting the team. ALL of them were very nice to me, and more than that, they seemed genuinely interested on my work. One suggestion I would make to this process is to move the design challenge to the beggining of the day. After 5 hours of talking I had a strong headache and couldn't really think clearly anymore, and that definitely made me suck on the exercise.