Applied Materials Application Engineer interview questions

First round with HM was amazing, very nice guy. Went very deep into technical, I couldn't answer a few things but he was very encouraging. At the end I asked for feedback and he gave me an honest answer. He basically covered the entire resume, asking as far as questions from Master's courses. But the entirety was focussed on role-specific background questions. The second round was Director level. This was the round that was awful. The Director seemed to expect me to be as deeply prepared in every aspect of my resume as the aspect that was relevant, and naturally I couldn't answer one of the first difficult questions he asked me. He instantly looked disappointed and as though I was wasting his time. When I stated some facts about myself, he looked surprised and annoyed like he hadn't debriefed with anyone about my candidacy. The interview got progressively worse and 25 minutes into a 1-hour interview, he concluded it and rejected me.

Three interviews: The first interview with a team leader for about an hour The second interview with the head of a study department is about an hour Third interview with a group leader