ZoomInfo Principal Software Engineer interview questions

There were 4 rounds of interviews. All the rounds were coding and some general questions. One interviewer asked me how to put 2-3 divs side by side. is that what you ask a Principal Engg? 2nd interviewer asked, reverse string. 3rd interviewer asked LRU interface, when I gave him the interface he said he needed generic. No one asked me architectural/design questions or system design questions or algorithmic questions. Not good interview process and questions