Thanks for the comment .
It’s not about bashing anyone .
Sharding has been a cool word to be mentioned during interviews. I have seen there are fresh grads also talking about it without any exp. In this case I won’t expect too much .
but as a senior dev ,dive into deeper is expected ,all we want is to have a discussion to dive deeper to see the decision making process when choosing a technology and how they understand the technology to solve what problem .
Thanks for your good suggestion ,I will try to be better interviewer .