Question 47 of 1,170

Implement and Manage Storage →mediumMatchingObjective-mapped

Azure Storage Redundancy Options

This AZ-104 practice question tests your understanding of implement and manage storage. 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.

Match each storage resiliency requirement to the Azure redundancy option that best satisfies it.

A
LRS: Locally redundant storage replicates data three times within a single datacenter in the primary region.
LRS is correctly defined as replicating data three times within a single datacenter, providing resilience against server and drive failures but not against datacenter or regional outages.
B
ZRS: Zone-redundant storage replicates data synchronously across three Azure availability zones in the primary region.
ZRS correctly describes synchronous replication across availability zones, protecting against zone-level failures.
C
GRS: Geo-redundant storage replicates data to a secondary region asynchronously and provides six copies across two regions.
GRS is correctly defined with asynchronous replication to a secondary region, offering high durability across regions.
D
RA-GRS: Read-access geo-redundant storage provides read access to the secondary region data.
RA-GRS adds read access to the secondary region, allowing read operations even if the primary region is unavailable.
E
LRS: Provides synchronous replication across three availability zones.
Why wrong: Incorrect — this description applies to ZRS, not LRS. LRS replicates within a single datacenter, not across zones.
F
GRS: Provides read access to the secondary region.
Why wrong: Incorrect — this describes RA-GRS, not GRS. GRS does not provide read access to the secondary region unless you have RA-GRS.

Full breakdown with real-world context →

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.

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: Locally redundant storage replicates data three times within a single datacenter in the primary region.
Why this is correct
LRS is correctly defined as replicating data three times within a single datacenter, providing resilience against server and drive failures but not against datacenter or regional outages.
Related concept
Read the scenario before looking for a memorised answer.
✓
ZRS: Zone-redundant storage replicates data synchronously across three Azure availability zones in the primary region.
Why this is correct
ZRS correctly describes synchronous replication across availability zones, protecting against zone-level failures.
Related concept
Read the scenario before looking for a memorised answer.
✓
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 with asynchronous replication to a secondary region, offering high durability across regions.
Related concept
Read the scenario before looking for a memorised answer.
✓
RA-GRS: Read-access geo-redundant storage provides read access to the secondary region data.
Why this is correct
RA-GRS adds read access to the secondary region, allowing read operations even if the primary region is unavailable.
Related concept
Read the scenario before looking for a memorised answer.
✗
LRS: Provides synchronous replication across three availability zones.
Why it's wrong here
Incorrect — this description applies to ZRS, not LRS. LRS replicates within a single datacenter, not across zones.
✗
GRS: Provides read access to the secondary region.
Why it's wrong here
Incorrect — this describes RA-GRS, not GRS. GRS does not provide read access to the secondary region unless you have RA-GRS.

Common exam traps

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.

Detailed technical explanation

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.

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.

Identify which AZ-104 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.

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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: 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.

What should I do if I get this AZ-104 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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