A panel of interviewers took turns asking questions. It was not at all conversational. They asked that I not ask questions. They then led me to an air-gapped computer where I was asked to complete an exercise for one hour. The exercise focused on designing a campaign.

Excellent process, I didn't get the job but I got some great, personal feedback in a call from the team lead. They told me that it was between me and one other person and that he got the job because they felt he would provide a contrasting personality in the team group dynamics, a bit of grit in the oyster, whereas I would be more similar to the rest of the team.