Problem
How does Spark handle data shuffling during a join operation, and how would you optimize a skewed join between a massive transaction table and a small metadata table?
Practicing as: Data Engineer interview at FlowHi, I'll play your Flow interviewer for the Data Engineer role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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