A Dropbox recruiter contacted me and invited me to participate in an online technical screen with an engineer. I performed extremely well in the online technical screen. Yet, after a week, the recruiter called to inform me of my rejection. When I asked for feedback on my performance, she said no such information was available.

I don't understand why the recruiter would waste my time and yet have nothing to deliver as feedback for my rejection. She could have just sent an email stating that I was rejected. In fact, she wasted two hours of my time just to deliver the news of my rejection, without any feedback.

I get the impression that Dropbox conducts interviews even though there are no real job openings, probably just to keep tabs on the employment market.

During the online technical screen, in a shared code editor, I was asked to write code for a LeetCode medium-level question.