Data Engineering on Microsoft Azure — Question 19

You have an Azure Data Lake Storage Gen2 container that contains 100 TB of data.
You need to ensure that the data in the container is available for read workloads in a secondary region if an outage occurs in the primary region. The solution must minimize costs.
Which type of data redundancy should you use?

Answer options

• A. geo-redundant storage (GRS)
• B. read-access geo-redundant storage (RA-GRS)
• C. zone-redundant storage (ZRS)
• D. locally-redundant storage (LRS)

Correct answer: A

Explanation

The correct answer is A, geo-redundant storage (GRS), as it replicates data to a secondary region, ensuring availability during an outage at a lower cost compared to RA-GRS. RA-GRS provides read access to the secondary region, which may not be necessary for all scenarios, while ZRS and LRS do not offer cross-region redundancy.