It was 7 interviews scheduled in 8 hours, all in a single day. Most of the interviewers jumped directly onto coding interviews. It was my first interview, and I was not prepared. I didn't even know that I needed to review data structures and algorithms.

Still, the process was not efficient either. First of all, I couldn't break the ice with any of them. Every question from my side had an answer: "It is confidential." I even asked what this role was about and what I would be doing, but I got the same answer.

Second, all interviewers (except for one) explained the coding questions orally. You need to have the information there with some examples. I could only do the one that had a prepared text for the question.

Questions were asked orally, so many that I cannot even remember. The ones that I do remember are:

• Counting the points in a cluster of points.
• Given a matrix (I don't know if it was an adjacency matrix because it was explained very poorly), find the number of islands (isolated nodes).