suggestion: harder system design questions

The SQL and Python content is at the right level. The system design questions feel like they were written for shitty companies - the ones where the bar is 'can you draw a box with an arrow.' If you want to cover FAANG prep you need questions that push on edge cases - what happens when the upstream data is late, how do you handle exactly-once semantics in a pipeline that writes to multiple sinks, that kind of thing. Not a complaint, just a gap I noticed.