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ZRS
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RA-GRS
RA-GZRS
AZ-104 Implement and Manage Storage Practice Question
Match each storage resiliency requirement to the Azure redundancy option that best satisfies it.
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
✓
LRS: Locally redundant storage replicates data three times within a single datacenter in the primary region.
LRS replicates within a single datacenter; ZRS across zones; GRS across regions; RA-GRS adds read access to GRS; RA-ZRS adds read access to ZRS. LRS is cheapest, GRS is highest durability.
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: Locally redundant storage replicates data three times within a single datacenter in the primary region.
Why this is correct
LRS correctly defines the base redundancy tier: data is written three times within a single datacenter in the primary region. This protects against server and drive failures, but offers no resilience against a full datacenter outage. LRS is the lowest-cost option and is acceptable when you can accept a single-datacenter point-of-failure or when data can be reconstructed from source.
- ✓
ZRS: Zone-redundant storage replicates data synchronously across three Azure availability zones in the primary region.
Why this is correct
ZRS accurately describes synchronous replication across three Azure availability zones within the primary region, ensuring that data survives entire zone outages. Unlike LRS, ZRS provides zone-level fault tolerance while keeping a single-region footprint, which is ideal for high-availability applications that do not need geo-redundancy. The synchronous write path guarantees no data loss when a zone fails.
- ✓
GRS: Geo-redundant storage replicates data to a secondary region asynchronously and provides six copies across two regions.
Why this is correct
GRS is correctly defined by asynchronous replication to a secondary region, resulting in six copies total: three in the primary region and three in the secondary region. The asynchronous nature introduces a possible RPO of up to 15 minutes, so data written just before a regional disaster could be lost. GRS improves durability against region-wide outages but does not offer read access to the secondary copy unless RA-GRS is enabled.
- ✓
RA-GRS: Read-access geo-redundant storage provides read access to the secondary region data.
Why this is correct
RA-GRS extends GRS by allowing read access to the secondary-region replica, which is a key differentiator for disaster-recovery and read-scaling scenarios. With RA-GRS, you can always read from the secondary endpoint even when the primary is healthy, and you can continue reading if the primary becomes unavailable. This is essential for applications requiring business continuity without write access in the secondary region.
- ✗
LRS: Provides synchronous replication across three availability zones.
Why it's wrong here
This statement is incorrect because synchronous replication across three availability zones is the defining characteristic of ZRS, not LRS. LRS replicates data three times within a single datacenter, providing no protection against an entire availability zone or datacenter failure. The mismatched description would mislead you into choosing the wrong redundancy tier if you were seeking zone-level fault tolerance.
- ✗
GRS: Provides read access to the secondary region.
Why it's wrong here
This statement is wrong because read access to the secondary region is a feature unique to RA-GRS (Read-Access Geo-Redundant Storage). GRS only replicates data asynchronously to a secondary region for durability but does not expose that secondary endpoint for reads. If you selected GRS expecting to read from the secondary region, you would need RA-GRS instead.
Go deeper
Related to this question
Learn chapter
Managed Identities for Azure Resources
Key term
GRS
GRS (Georedundant Storage) is a data replication method that copies your stored data to a secondary region hundreds of miles away to protect against regional disasters.
Key term
LRS
An LRS (Learning Record Store) is a system that collects, stores, and retrieves learning data from various training activities, often used to track progress in IT certification study programs.
About these practice questions
Courseiva writes every AZ-104 question from scratch — 1,049 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.