Spark DataFrames and ML End-to-End

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Your question is Spark DataFrames and ML End-to-End. 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).

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Problem

Explain what Spark DataFrames are and walk me through an end-to-end machine learning project you implemented, including data preparation, algorithm choices, evaluation, and outcomes.