AZ-204 Certification Practice Question #188

Question

You are building a web application that performs image analysis on user photos and returns metadata containing objects identified. The image analysis is very costly in terms of time and compute resources. You are planning to use Azure Redis Cache so duplicate uploads do not need to be reprocessed.
In case of an Azure data center outage, metadata loss must be kept to a minimum.
You need to configure the Azure Redis cache instance.
Which two actions should you perform? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

Accepted Answer

The goal is to minimise metadata loss in an Azure data center outage, not just to have some persistence. AOF persistence (A) logs every write operation — providing near-zero data loss — while RDB persistence (B) takes periodic snapshots with potential up-to-15-minute loss. When AOF is enabled, a second storage account (C) allows Redis to rebuild the cache from AOF logs even if the primary zone is destroyed, per Microsoft's own documentation. The 15-vote community consensus, two exam-verified reports, and multiple references to MS Learn all confirm AC. The BD argument citing ZRS incompatibility with AOF is irrelevant because a second storage account can reside in a different region without requiring ZRS.

More AZ-204 practice questions