System design questions approach non internet tech background
I've been a developer for many years but not in internet tech. I've never professionally worked with internet tech like websites or users. Luckily I read a lot about internet technologies. So how do I approach the system design question? I haven't had a system design interview yet so I may be off.
But I'm studying up on it and my naive approach is to memorize how the top internet sites scaled up and use parts of their solutions to solve whatever unique problem I'm asked.
The big problem with that is that its not authentic. It's not what I do. Is that OKAY? I feel like it's a trap and the interviewer will just sit there and wait for me to say something stupid.
It's like if you tech guys come to finance and I asked you how to build a stock exchange. You can memorize how some of them did it, but u'd miss some details. Or worse you'd make something up and look totally stupid.
Is there a way to become totally relaxed with this interview round and sound authentic when it's not in your background?
The data structures and algorithms is also something I don't use often, but I feel comfortable with it because there is a deterministic answer. I feel like the system design is more open ended and more of a check on your actual experience. Which doesn't make sense when you come from a different industry. Am I totally off?