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    PracticeAzure Solutions Architect Expert (AZ-305)Azure Solutions Architect Expert AZ-305 Practice Exam 1Question 37
    Medium1 markMultiple Choice
    Domain 3.2: Design for high availabilityDomain 3High AvailabilityStorageZRS

    AZ-305 · Question 37 · Domain 3.2: Design for high availability

    A company is designing a storage architecture for a new application.

    The application requires high availability for its data. If an entire Azure datacenter goes offline due to a fire, the application must continue to read and write data without any manual intervention or configuration changes. However, the company wants to avoid the costs associated with replicating data to a completely different geographic region.

    Which storage redundancy option should you recommend?

    Answer options:

    A.

    Zone-Redundant Storage (ZRS)

    B.

    Locally-Redundant Storage (LRS)

    C.

    Geo-Redundant Storage (GRS)

    D.

    Read-Access Geo-Redundant Storage (RA-GRS)

    How to approach this question

    Identify the failure domain (datacenter) and the constraint (no cross-region). ZRS fits perfectly.

    Full Answer

    A.Zone-Redundant Storage (ZRS)✓ Correct
    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 datacenter failures automatically. Because the data stays within the same region, it avoids the higher costs associated with Geo-Redundant Storage (GRS).

    Common mistakes

    Choosing GRS for 'datacenter failure' protection, ignoring the explicit requirement to avoid cross-region costs.
    Question 36All questionsQuestion 38

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