I was going to add that. It's one thing where a developer gets asked, "Well, if you could rearchitect (or create) our application, what would you do?" and then discuss what frameworks, where to focus on caching and optimization, discuss technology, paradigm etc.
And I've been asked this before, "We serve a million visitors a day, what kind of caching and optimizations would you implement to handle that type of traffic?" Completely fair question.
And I've been asked this before, "We serve a million visitors a day, what kind of caching and optimizations would you implement to handle that type of traffic?" Completely fair question.
It's another to do that work.