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Pill 6 · Cache, Persist & Checkpoint

Quiz: Can You Navigate the Lineage Trap?

These questions test whether you understand the two-layer model, why persist() is invisible to Catalyst, and how checkpoint() solves problems that no amount of memory or executors can fix.

Quiz

Pill 6: Cache, Persist, and Checkpoint

Question 1 of 7

How did it go?

If you scored below 70%, re-read Pill 6 with this mental model: draw two boxes labeled "Driver (Layer 1)" and "Executors (Layer 2)." For each Spark API call, ask yourself which box it affects. That separation is the key to understanding caching behavior.

Re-read Pill 6