hard20 pts · first answer countsml-pipelinesfeature-storetraining-serving-skew

Bug fixed offline only

A bug in "days_since_last_order" was fixed and the offline history was backfilled with the new logic. The model was retrained on it. The streaming job that fills the online store still runs the old code. What follows?

A.Nothing, since the model only uses offline dataB.The online store rejects values from old codeC.Serving uses logic the model never trained onD.Accuracy improves because the two versions mix

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Bug fixed offline only

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