I waited for the interviewer at the cafeteria, then was led to a small meeting room by one of the team's personnel. I was given a basic description of the job, then was asked a few basic programming questions and told to write down my answers (they kept the paper), while the interviewer looked around or glanced at their phone. The actual interview took less than an hour.

Build a data structure that can store information about people and relationships. (This was given a fluid description, and I was expected to fill in the details as needed or as understood.) Then, I was questioned about the data structure I built, for example, how I would search for things.

You have many rooms and temperature sensors, and you want to keep a record of all the temperatures. Given a regular function and an event-driven function. (This was also given a fluid description, and I was expected to fill in.)