I was seated in front of an HR lady and a controls engineer who both had their turns asking me various questions. The STAR system is very key for GM interviews - They ask you about an experience and you must give them the Situation, the Task, the Action, and the Result. It is advised to practice this style of interviewing because these questions far outweighed any technical questions.

I was interviewed by 2 senior engineers. Most behavior questions about my past project but there was a question that ask how would I fix one of a specific machine