The interview consist of several rounds of interview with hr, line manager and half day group activity. The interview with line manager also require to solve a few quizzes that measure your ability to think rationally.

The first interview asked a lot of the standard behavioral questions, but the "riddle" was a question that I never got asked before. The second interview they fly you somewhere and place you on a team with many, many team-building exercises. They (probably wisely) over-emphasized how difficult field life was but also took the time to try and explain as much as possible. Good interview process.