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    PracticeAzure Solutions Architect Expert (AZ-305)Azure Solutions Architect Expert AZ-305 Practice Exam 5Question 25
    Medium1 markMultiple Choice
    Domain 2.3: Recommend a data storage solutionDomain 2StorageRedundancyHigh Availability

    AZ-305 · Question 25 · Domain 2.3: Recommend a data storage solution

    You are designing the storage architecture for a financial application. The application stores transaction receipts in an Azure Storage account.

    The business requires that the data remains highly available even if an entire Azure region goes offline. Furthermore, if a region fails, the application must still be able to read the receipts from the secondary region immediately, without waiting for Microsoft to initiate a failover.

    Which TWO storage redundancy options meet these requirements? (Select TWO)

    Answer options:

    A.

    Geo-redundant storage (GRS)

    B.

    Read-access geo-redundant storage (RA-GRS)

    C.

    Zone-redundant storage (ZRS)

    D.

    Read-access geo-zone-redundant storage (RA-GZRS)

    E.

    Locally redundant storage (LRS)

    How to approach this question

    Look for redundancy options that include 'Geo' (for regional failure) and 'Read-access' (for immediate read availability).

    Full Answer

    Read-access geo-redundant storage (RA-GRS), Read-access geo-zone-redundant storage (RA-GZRS)
    To survive a regional outage, the storage account must use a geo-redundant option (GRS or GZRS). However, standard GRS and GZRS do not allow read access to the secondary region until Microsoft declares a disaster and initiates a failover. To read data immediately from the secondary region at any time, you must use the Read-Access variants: RA-GRS or RA-GZRS. These provide a secondary endpoint (e.g., accountname-secondary.blob.core.windows.net) for read operations.

    Common mistakes

    Selecting GRS or GZRS without the 'RA-' prefix, forgetting that standard geo-replication does not allow read access to the secondary replica.
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    Practice the full Azure Solutions Architect Expert AZ-305 Practice Exam 5

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