A 5 years+ tech lead said they shard a database to scale but then he failed to answer this question

Never talk about something you do not fully understand during an interview

Another interview story.

Q: “Introduce yourself and the recent project you are working on, as detail as possible”.

A: “Sure, I’m …, working at an internet company, a public-facing platform that serves millions of requests per minute..blabla.. my team is a search module, and we provide search services to other teams.”