- A
Enable versioning on the storage account so the archived blob can be read immediately.
Why wrong: Versioning does not make archived blobs online or readable. It helps preserve previous versions of objects, but it does not change the access tier or rehydrate archived content. The blob would still be unavailable until it is restored from Archive.
- B
Change the blob tier from Archive to Hot or Cool to start rehydration.
Archived blobs are offline and cannot be read until they are rehydrated. Changing the access tier to Hot or Cool begins the rehydration process, after which the blob becomes available again. Because the engineer can wait, this is the correct administrative action rather than copying the data elsewhere or changing account settings.
- C
Move the blob to a different container in the same storage account.
Why wrong: Moving the blob to another container does not restore access to archived data. The archive state is attached to the blob itself, so relocating it does not make it readable. The blob must first be rehydrated from Archive.
- D
Switch the storage account replication from LRS to ZRS.
Why wrong: Replication settings affect resilience, not whether a blob in Archive can be read. Changing redundancy does not rehydrate archived data and will not resolve the immediate access failure. The issue is the access tier, not the replication model.
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 lifecycle rule moved old audit logs to the Archive tier. A support engineer now needs to read one archived blob, and the download request fails with a message that the blob is archived. The engineer can wait several hours for the data to become available. What should the administrator do?
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
Change the blob tier from Archive to Hot or Cool to start rehydration.
Option B is correct because archived blobs in Azure Storage are offline and cannot be read directly. To access the data, the blob must first be rehydrated by changing its tier to Hot or Cool, which initiates an asynchronous copy of the blob data to an online tier. This process can take up to 15 hours, matching the engineer's ability to wait several hours.
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.
- ✗
Enable versioning on the storage account so the archived blob can be read immediately.
Why it's wrong here
Versioning does not make archived blobs online or readable. It helps preserve previous versions of objects, but it does not change the access tier or rehydrate archived content. The blob would still be unavailable until it is restored from Archive.
- ✓
Change the blob tier from Archive to Hot or Cool to start rehydration.
Why this is correct
Archived blobs are offline and cannot be read until they are rehydrated. Changing the access tier to Hot or Cool begins the rehydration process, after which the blob becomes available again. Because the engineer can wait, this is the correct administrative action rather than copying the data elsewhere or changing account settings.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Move the blob to a different container in the same storage account.
Why it's wrong here
Moving the blob to another container does not restore access to archived data. The archive state is attached to the blob itself, so relocating it does not make it readable. The blob must first be rehydrated from Archive.
- ✗
Switch the storage account replication from LRS to ZRS.
Why it's wrong here
Replication settings affect resilience, not whether a blob in Archive can be read. Changing redundancy does not rehydrate archived data and will not resolve the immediate access failure. The issue is the access tier, not the replication model.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse storage account settings (versioning, replication, container moves) with blob-tier operations, failing to recognize that only a tier change initiates rehydration for archived blobs.
Detailed technical explanation
How to think about this question
Rehydration of an archived blob can be performed by setting the tier to Hot (priority rehydration, ~1 hour) or Cool (standard rehydration, up to 15 hours). The operation is asynchronous: Azure Storage copies the blob data from the offline Archive tier to the selected online tier, and the original blob remains in Archive until the copy completes. During rehydration, the blob's status changes to 'rehydrate-pending-to-hot' or 'rehydrate-pending-to-cool', and reads will fail until the process finishes.
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
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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: Change the blob tier from Archive to Hot or Cool to start rehydration. — Option B is correct because archived blobs in Azure Storage are offline and cannot be read directly. To access the data, the blob must first be rehydrated by changing its tier to Hot or Cool, which initiates an asynchronous copy of the blob data to an online tier. This process can take up to 15 hours, matching the engineer's ability to wait several hours.
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.
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Last reviewed: Jun 11, 2026
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