Question 1mediummultiple choice
Full question →mediummultiple choiceObjective-mapped
A company uses Azure Blob Storage to store backup files that must survive a complete regional outage. The company needs the data to be automatically accessible from a secondary region if the primary region becomes unavailable, without any manual failover. Which storage redundancy option should the company use?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
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Locally Redundant Storage (LRS)
LRS replicates data three times within a single datacenter. It protects against server rack and drive failures but not against a full datacenter or regional outage. Therefore, it does not meet the requirement for surviving a complete regional outage.
B
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Zone-Redundant Storage (ZRS)
ZRS replicates data synchronously across three Azure availability zones within a primary region. It protects against a zone failure but not against a full regional outage. Data is not replicated to a secondary region, so it does not satisfy the requirement.
C
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Geo-Redundant Storage (GRS)
GRS replicates data to a paired secondary region, providing resilience against a regional outage. However, to access data in the secondary region, a customer must initiate a manual failover (or rely on Microsoft-managed failover for rare events). The question specifies 'without any manual failover,' so GRS alone does not meet the requirement.
D
Best answer
Read-Access Geo-Redundant Storage (RA-GRS)
RA-GRS is identical to GRS in replication (data is copied to a secondary region), but it additionally enables read access to the secondary region at all times. If the primary region fails, data is automatically readable from the secondary endpoint without any manual failover steps, exactly matching the requirement. (The same logic applies to RA-GZRS for zone-redundant geo-replication.)
Common exam trap
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Technical deep dive
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Read the scenario before looking for a memorised answer.
- Find the constraint that changes the correct option.
- Eliminate answers that are true in general but not in this case.
- Use explanations to understand the rule behind the answer.
TExam Day Tips
- Underline the problem statement mentally.
- Watch for words such as best, first, most likely and least administrative effort.
- Review why wrong options are wrong, not only why the correct option is correct.
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More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
A developer is building a serverless application that requires integration with an on-premises SQL Server database for real-time data processing. The on-premises network is connected to Azure via a site-to-site VPN. Which Azure service would allow the function to securely access the on-premises database without exposing it to the public internet?
Question 2
A solutions architect is designing a storage solution for a large media company. The company needs to store video files that are accessed infrequently but must be retained for several years for compliance. Which two Azure storage options meet these requirements? (Select two.)
Question 3
A company deploys a multi-tier application using Azure virtual machines. The web tier VMs must be evenly distributed across two distinct data centers within an Azure region to avoid a single point of failure from an infrastructure outage. Which Azure construct should they use to meet this requirement?
Question 4
A company wants to enforce a set of security policies across all their Azure subscriptions. They have created several individual policy definitions. Which Azure construct should they use to group these policies together and assign them as a single package?
Question 5
A company deploys a line-of-business application on an Azure virtual machine. The IT team wants to ensure the application remains secure. According to the shared responsibility model, which of the following security tasks is the sole responsibility of the customer (the company)?
Question 6
A company develops a web API that runs on Azure App Service. The development team wants to deploy a new version of the API to a staging environment, run integration tests against it, and then gradually shift production traffic to the new version. If any issues are detected, they want to immediately roll back to the previous version without redeploying. Which Azure App Service feature should the team use to meet these requirements?
FAQ
Questions learners often ask
What does this AZ-900 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: Read-Access Geo-Redundant Storage (RA-GRS) — The question tests knowledge of Azure Storage redundancy options, specifically the difference between Geo-Redundant Storage (GRS) and Read-Access Geo-Redundant Storage (RA-GRS). While both replicate data to a paired secondary region, only RA-GRS (or RA-GZRS) provides automatic read access to the secondary region without requiring a manual failover. LRS protects against a single datacenter failure, ZRS protects against a zone failure within a region, and GRS requires a customer-initiated failover to access data in the secondary region.
What should I do if I get this AZ-900 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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