Zynga interview questions

It seems that the interviewer was taking this opportunity to learn from outside about how to do something which I have done. Existing Tech stack is old old old old.

First directly to one on one. Started asking about algorithm , data structure, etc. They started asking about the real time solutions which has hidden question on data structure. I felt it is totally unrelated to the senior programmer. No developer will memorise the huge number of algorithms and data structure for interview.