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.
An administrator moved a blob to the Archive tier last month. A user needs to open it tomorrow. What must happen before the file can be read?
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 to Hot or Cool and wait for rehydration to complete
To read a blob in the Archive tier, it must first be rehydrated to the Hot or Cool tier. This process, called rehydration, changes the blob's tier and makes it accessible for reading. Until rehydration completes, the blob remains offline and cannot be read.
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.
✓
Change the blob to Hot or Cool and wait for rehydration to complete
Why this is correct
Archive blobs are offline, so they must be rehydrated to an online tier such as Hot or Cool before they can be read.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create a snapshot of the archived blob
Why it's wrong here
A snapshot does not make an archived blob readable; it only captures a point-in-time copy of the blob.
✗
Enable versioning on the storage account
Why it's wrong here
Versioning helps track blob changes, but it does not bring archived data back online for immediate access.
✗
Move the storage account to LRS redundancy
Why it's wrong here
Changing redundancy affects replication, not the online or offline state of an archived blob.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think archived blobs can be read directly or that other operations like snapshots or versioning bypass the rehydration requirement, but Azure explicitly requires tier change and rehydration before any read access.
Detailed technical explanation
How to think about this question
Rehydration from Archive tier involves changing the blob tier to Hot or Cool, which triggers an asynchronous copy operation. The rehydration time depends on the priority (Standard or High) and can take up to 15 hours for Standard priority. During rehydration, the blob's status is 'rehydrate-pending-to-hot' or 'rehydrate-pending-to-cool', and read requests return HTTP 409 (Conflict) until complete.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-104 question in full detail.
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 to Hot or Cool and wait for rehydration to complete — To read a blob in the Archive tier, it must first be rehydrated to the Hot or Cool tier. This process, called rehydration, changes the blob's tier and makes it accessible for reading. Until rehydration completes, the blob remains offline and cannot be read.
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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Question Discussion
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