Quick Answer
The answer is locally-redundant storage (LRS). LRS replicates your data three times within a single physical location in the same Azure region, which means no copy ever leaves that region, making it the only replication option that guarantees full compliance with data residency regulations. On the Microsoft Azure Data Fundamentals DP-900 exam, this question tests your understanding of how replication choices directly map to compliance requirements—a common trap is confusing zone-redundant storage (ZRS), which still stays in one region but spans multiple availability zones, with true single-location residency. To remember, think of LRS as "Locked to Region Storage": all three copies are locked inside one datacenter, ensuring your data never crosses regional boundaries.
This DP-900 practice question tests your understanding of describe core data concepts. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Your company stores customer data in Azure Blob Storage. To comply with data residency regulations, you must ensure data is replicated within the same Azure region. Which replication option should you choose?
Zone-redundant storage (ZRS)
Why wrong: ZRS replicates across zones within the same region, but LRS is sufficient.
Locally-redundant storage (LRS)
LRS replicates within a single region, keeping data resident.
Geo-redundant storage (GRS)
Why wrong: GRS replicates to a paired region, moving data out of the region.
Read-access geo-redundant storage (RA-GRS)
Why wrong: RA-GRS also replicates to a secondary region.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Locally-redundant storage (LRS)
Locally-redundant storage (LRS) replicates data three times within a single physical location in the same Azure region, ensuring data residency compliance by never copying data outside that region. This is the only option that guarantees all replicas stay within one region without any cross-region or cross-zone replication.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Zone-redundant storage (ZRS)
Why it's wrong here
ZRS replicates across zones within the same region, but LRS is sufficient.
Locally-redundant storage (LRS)
Why this is correct
LRS replicates within a single region, keeping data resident.
Related concept
Read the scenario before looking for a memorised answer.
Geo-redundant storage (GRS)
Why it's wrong here
GRS replicates to a paired region, moving data out of the region.
Read-access geo-redundant storage (RA-GRS)
Why it's wrong here
RA-GRS also replicates to a secondary region.
Common exam traps
The trap here is that candidates often confuse 'replication within the same region' with 'zone-redundant storage' (ZRS) because ZRS also stays within the region, but the question's emphasis on 'data residency' and 'same region' is designed to test whether you know that LRS is the simplest and most restrictive option that keeps all copies in a single location, while ZRS still uses multiple zones which may be considered separate data centers for some compliance definitions.
Detailed technical explanation
Under the hood, LRS writes three synchronous replicas to different fault domains within the same Azure storage scale unit, providing 11 nines of durability (99.999999999%) but no protection against a regional disaster. For strict data residency, LRS is the only option that guarantees no data leaves the region, as ZRS still distributes across zones (which are physically separate but within the same region) and GRS/RA-GRS explicitly replicate to a paired region. In real-world scenarios, financial institutions or healthcare providers subject to regulations like GDPR or local data sovereignty laws often mandate LRS to avoid any cross-border data movement.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Describe core data concepts — This question tests Describe core data concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Locally-redundant storage (LRS) — Locally-redundant storage (LRS) replicates data three times within a single physical location in the same Azure region, ensuring data residency compliance by never copying data outside that region. This is the only option that guarantees all replicas stay within one region without any cross-region or cross-zone replication.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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