1) Email exchange & subsequent phone interview with HR. Asked about background, etc.
2) Technical phone call, asked about background in comp vision, programming etc. This included the 1 programming question I was asked (*a++ = *b++). I fumbled in this answer, but I should've known this.
They were considering me, and a possible programming test was to be scheduled. However, a few days later I emailed for an update, and the HR sent me a "dear john" email.
I think this question is asked very often in their interviews so I should've known it, but also that they were a bit quick to judge on one question alone. I was expecting a broader range of questions.