Your question is Columnar Databases Performance. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Why are columnar databases more performant in terms of reads?
Asked in the final technical interview stage. Database technical question in a final round. Focus on read performance, not write-heavy workloads.