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Pill 5 · Data Skew

Quiz: Can You Diagnose and Fix Data Skew?

These questions test whether you can identify skew from Spark UI metrics, understand the failure cascade, and choose the right mitigation for different scenarios.

Quiz

Pill 5: Data Skew — Detection and Mitigation

Question 1 of 7

How did it go?

If you scored below 70%, re-read Pill 5 with the Spark UI open on a real job. Find a stage with skew (max >> P75) and trace the cascade through the metrics. Theory sticks better when you see it live.

Re-read Pill 5 Next: Pill 6 Quiz — Cache, Persist & Checkpoint