- A
Create the storage account with zone-redundant storage (ZRS).
ZRS keeps copies across multiple availability zones in the region, so one zone outage will not interrupt access.
- B
Create a private endpoint in AppSubnet for the storage account.
A private endpoint places a private IP for the storage service into the VNet, which satisfies private-only access.
- C
Disable public network access on the storage account.
Turning off public network access prevents use of the public endpoint and forces clients to use private connectivity.
- D
Use locally redundant storage (LRS) because it stays inside one datacenter.
Why wrong: LRS protects only within a single datacenter, so it does not meet the requirement to survive a zone outage.
- E
Enable a service endpoint on AppSubnet instead of using a private endpoint.
Why wrong: A service endpoint does not create a private IP, so it does not satisfy the private-only connectivity requirement.
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. A key principle to apply: zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.. 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 finance application stores monthly invoice PDFs in Azure Blob Storage. The data must survive a single availability zone outage in the region, and the storage account must be reachable only through a private IP from AppSubnet. Public network access must not be available. Which three actions should the administrator take? Select three.
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
Create the storage account with zone-redundant storage (ZRS).
Option A is correct because Zone-Redundant Storage (ZRS) synchronously replicates data across three Azure availability zones within the same region, ensuring data durability even if one entire zone fails. This meets the requirement to survive a single availability zone outage.
Key principle: Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create the storage account with zone-redundant storage (ZRS).
Why this is correct
ZRS keeps copies across multiple availability zones in the region, so one zone outage will not interrupt access.
Related concept
Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
- ✓
Create a private endpoint in AppSubnet for the storage account.
Why this is correct
A private endpoint places a private IP for the storage service into the VNet, which satisfies private-only access.
Related concept
Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
- ✓
Disable public network access on the storage account.
Why this is correct
Turning off public network access prevents use of the public endpoint and forces clients to use private connectivity.
Related concept
Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
- ✗
Use locally redundant storage (LRS) because it stays inside one datacenter.
Why it's wrong here
LRS protects only within a single datacenter, so it does not meet the requirement to survive a zone outage.
When this WOULD be correct
If the question required cost optimization and only needed resilience against a single datacenter failure (e.g., a non-critical app with low durability needs), LRS would be correct. For example, a development storage account where data loss is acceptable.
- ✗
Enable a service endpoint on AppSubnet instead of using a private endpoint.
Why it's wrong here
A service endpoint does not create a private IP, so it does not satisfy the private-only connectivity requirement.
When this WOULD be correct
A scenario where the requirement is to restrict access to a specific subnet without needing private IP addresses, such as when using a service endpoint to allow access from a VNet while still permitting public access from other sources, or when the storage account must be accessible over the internet but only from a specific subnet.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-104 exam frequently reuses these exact scenarios with slightly different constraints.
✓Create the storage account with zone-redundant storage (ZRS).Correct answer▾
Why this is correct
ZRS keeps copies across multiple availability zones in the region, so one zone outage will not interrupt access.
✗Use locally redundant storage (LRS) because it stays inside one datacenter.Wrong answer — click to see why▾
Why this is wrong here
LRS does not survive a single availability zone outage because it replicates data within a single datacenter, not across zones. The requirement for zone-level resilience necessitates ZRS.
★ When this WOULD be the correct answer
If the question required cost optimization and only needed resilience against a single datacenter failure (e.g., a non-critical app with low durability needs), LRS would be correct. For example, a development storage account where data loss is acceptable.
Why candidates choose this
Candidates may confuse LRS with ZRS or assume LRS provides zone redundancy, or they focus on cost savings without reading the resilience requirement carefully.
✗Enable a service endpoint on AppSubnet instead of using a private endpoint.Wrong answer — click to see why▾
Why this is wrong here
Service endpoints do not provide private IP connectivity; they route traffic over the Azure backbone but still use public endpoints. The requirement for reachability only through a private IP from AppSubnet mandates a private endpoint, not a service endpoint.
★ When this WOULD be the correct answer
A scenario where the requirement is to restrict access to a specific subnet without needing private IP addresses, such as when using a service endpoint to allow access from a VNet while still permitting public access from other sources, or when the storage account must be accessible over the internet but only from a specific subnet.
Why candidates choose this
Candidates may confuse service endpoints with private endpoints, thinking both provide private connectivity, or they may believe service endpoints are sufficient for private access when the question explicitly requires private IP reachability.
Analysis generated from the official AZ-104blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse service endpoints with private endpoints, thinking a service endpoint alone provides private IP-only access, but it does not disable the public endpoint and still relies on the storage account's public DNS name.
Detailed technical explanation
How to think about this question
Azure Private Endpoint uses a network interface with a private IP from the virtual network, routing traffic over the Microsoft backbone via Private Link, which completely bypasses the public internet. ZRS uses synchronous replication across three zones with a Recovery Point Objective (RPO) of zero and a Recovery Time Objective (RTO) typically within minutes, making it suitable for critical financial data that must survive zone failures.
KKey Concepts to Remember
- Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
- ZRS ensures data availability during a single availability zone outage.
- Private Endpoints provide a private IP address for Azure services within a VNet.
- Disabling public network access restricts access to only private endpoints.
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
Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
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.
Visual reference
Quick reference
Azure Blob Storage Tier Comparison
| Tier | Storage Cost | Retrieval Cost | Latency | Use Case |
|---|---|---|---|---|
| Hot | Highest | Lowest | Immediate | Active data, frequent reads |
| Cool | Lower | Higher | Immediate | Data accessed < once / month |
| Cold | Lower still | Higher | Immediate | Data accessed < once / quarter |
| Archive | Lowest | Highest + rehydration delay | Hours | Long-term compliance retention |
What to study next
Got this wrong? Here's your next step.
Review zone-Redundant Storage (ZRS) replicates data across three Azure availability zones., then practise related AZ-104 questions on the same topic to reinforce the concept.
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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 — Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones..
What is the correct answer to this question?
The correct answer is: Create the storage account with zone-redundant storage (ZRS). — Option A is correct because Zone-Redundant Storage (ZRS) synchronously replicates data across three Azure availability zones within the same region, ensuring data durability even if one entire zone fails. This meets the requirement to survive a single availability zone outage.
What should I do if I get this AZ-104 question wrong?
Review zone-Redundant Storage (ZRS) replicates data across three Azure availability zones., then practise related AZ-104 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Zone-Redundant Storage (ZRS) replicates data across three Azure availability zones.
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Last reviewed: Jun 11, 2026
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