You are provisioning a new Azure Storage account for a critical application.

The application requires that data remains highly available even if an entire Azure data center goes offline due to a power failure. However, due to strict data residency laws, the data must NEVER leave the primary Azure region.

Which storage redundancy option must you select?

Answer options:

Locally-redundant storage (LRS)

Zone-redundant storage (ZRS)

Geo-redundant storage (GRS)

Geo-zone-redundant storage (GZRS)

How to approach this question

Match 'data center failure protection' with 'must not leave the region'.

Full Answer

B.Zone-redundant storage (ZRS)✓ Correct

Zone-redundant storage (ZRS)

Zone-redundant storage (ZRS) replicates your Azure Storage data synchronously across three Azure availability zones in the primary region. Each availability zone is a separate physical location with independent power, cooling, and networking. This protects against a data center failure while ensuring the data never leaves the specified region, satisfying the data residency constraint.

Common mistakes

Choosing GRS for maximum protection, ignoring the explicit constraint that data must not leave the primary region.

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Practice the full Azure Solutions Architect Expert AZ-305 Practice Exam 2

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