- A
LRS, because it keeps three copies within one datacenter.
Why wrong: LRS protects against disk or server failures within a datacenter, but it does not add zone-level resiliency.
- B
ZRS, because it stores copies across multiple availability zones in the region.
ZRS places copies of the data across availability zones in the same region, which helps the storage remain available during a zone failure.
- C
GRS, because it automatically makes the account available in another region for reads.
Why wrong: GRS adds geo-replication to a paired region, but the primary benefit here is zone resilience, not secondary-region read access.
- D
RA-GRS, because it is the only option that keeps a secondary copy.
Why wrong: RA-GRS provides read access to the secondary region, but it is designed for geo-redundancy rather than zone-level protection.
AZ-104 Implement and Manage Storage Practice Question
This AZ-104 practice question tests your understanding of implement and manage storage. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company hosts documents in Azure Blob Storage. The files must remain available if one availability zone in the region fails. Which redundancy option should the administrator choose?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
ZRS, because it stores copies across multiple availability zones in the region.
B is correct because Zone-Redundant Storage (ZRS) synchronously replicates data across three Azure availability zones within a primary region, ensuring data remains accessible if one zone fails. This meets the requirement for high availability within a single region without relying on a secondary region.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
LRS, because it keeps three copies within one datacenter.
Why it's wrong here
LRS protects against disk or server failures within a datacenter, but it does not add zone-level resiliency.
- ✓
ZRS, because it stores copies across multiple availability zones in the region.
Why this is correct
ZRS places copies of the data across availability zones in the same region, which helps the storage remain available during a zone failure.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
GRS, because it automatically makes the account available in another region for reads.
Why it's wrong here
GRS adds geo-replication to a paired region, but the primary benefit here is zone resilience, not secondary-region read access.
- ✗
RA-GRS, because it is the only option that keeps a secondary copy.
Why it's wrong here
RA-GRS provides read access to the secondary region, but it is designed for geo-redundancy rather than zone-level protection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse LRS (three copies in one datacenter) with zone-level redundancy, or they incorrectly assume GRS or RA-GRS are needed for intra-region availability, when ZRS is the correct choice for zone failure protection within a single region.
Detailed technical explanation
How to think about this question
ZRS uses synchronous replication across three distinct Azure availability zones, each with independent power, cooling, and networking, providing a Recovery Point Objective (RPO) of zero and a Recovery Time Objective (RTO) of minutes for zone failures. Under the hood, Azure Blob Storage with ZRS commits writes only after all three copies are confirmed, ensuring strong consistency. A real-world scenario is a regional event like a power outage in one zone; ZRS allows continued read and write operations without manual intervention, unlike LRS which would lose data.
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.
TExam Day Tips
- 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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this AZ-104 question test?
Implement and Manage Storage — This question tests Implement and Manage Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: ZRS, because it stores copies across multiple availability zones in the region. — B is correct because Zone-Redundant Storage (ZRS) synchronously replicates data across three Azure availability zones within a primary region, ensuring data remains accessible if one zone fails. This meets the requirement for high availability within a single region without relying on a secondary region.
What should I do if I get this AZ-104 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jun 11, 2026
This AZ-104 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-104 exam.
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