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Pill 5 · 9 Real Errors

Quiz: Bugs That Never Threw an Error

These questions test whether you can spot the same pattern (a technical column trusted to mean something it didn't) across nine differently-shaped bugs, not just recall each one individually.

Quiz

Pill 5: Staging, Proration & Invariants

Question 1 of 7

How did it go?

If you scored below 70%, re-read Pill 5, and if you have your own checkout, run the query that confirms zero reservations start before their accommodation's listed_at. Confirming an invariant holds on real data is a better test of understanding than remembering the story behind it.

Re-read Pill 5 Back to the full series