Applied Materials interview questions

Questions about research and technical know-how since panel followed technical presentation. Very simple and discussion based with a lot of hypothetical scenarios regarding the research. Did not get any opportunity to ask any questions from my side to the team. In two interviews the panel did not introduce themselves and gave no description of what they do in the company, making it hard to evaluate their understanding and knowledge about a given concept. I guess when the answers to their questions started with a simpler explanation they must have assumed that the candidate does not understand the complexity. They instead sounded offended. Despite reminding them that they had not introduced themselves and thats why i dint understand the level of complexity expected in their answer. And without the knowledge of their experience and expertise, I felt safer to assume that they would have a basic level of understanding. Felt very weird after these two panels. Some of the scientists on the panels were much better communicators than others.