I was initially emailed by an HR person who set me up with a phone interview.

The phone interview was with a very rude manager who kept interrupting me and spoke with a heavy Indian accent.

He asked me a few questions that were, in my opinion, not very clearly defined.

The conversation ended earlier than I had been told (15 minutes as opposed to 45 minutes), which I think was due to the fact that I asked for several clarifications.

A few weeks later, I was emailed that I was not chosen for the position.

If there exists a sequence of integers in order, and you are at a receiver and obtain these integers out of order, how can you know which integer is missing?

The interviewer asked me several questions about face detections. The interviewer did not know much about this topic, though, and was just trying to test the level of my knowledge.