This AZ-204 practice question tests your understanding of develop for azure 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.
You need to implement a shared access signature (SAS) for an Azure blob container that allows a client to list blobs and read blob contents. The SAS must be valid for one hour and should not allow write or delete operations. Which permissions should you include in the SAS token?
r, l, and c
Why wrong: Create permission is not required.
r and l
Read and list permissions are sufficient for the requirements.
r, l, and d
Why wrong: Delete permission is not required.
r, l, and w
Why wrong: Write permission is not required and would grant unintended access.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
r and l
Option B is correct because the SAS token needs 'r' (read) to allow reading blob contents and 'l' (list) to allow listing blobs in the container. These two permissions together satisfy the requirement for read-only access without write or delete capabilities.
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.
r, l, and c
Why it's wrong here
Create permission is not required.
r and l
Why this is correct
Read and list permissions are sufficient for the requirements.
Related concept
Read the scenario before looking for a memorised answer.
r, l, and d
Why it's wrong here
Delete permission is not required.
r, l, and w
Why it's wrong here
Write permission is not required and would grant unintended access.
Common exam traps
The trap here is that candidates may confuse 'l' (list) with 'r' (read) or include 'c' (create) thinking it's needed for listing, but 'l' alone enables listing blobs in a container without requiring create permissions.
Detailed technical explanation
Azure SAS tokens use granular permissions mapped to REST API operations: 'r' maps to GetBlob, 'l' maps to ListBlobs, 'w' maps to PutBlob, 'd' maps to DeleteBlob, and 'c' maps to CreateContainer or PutBlob. The SAS token is signed with the storage account key and includes the permissions string, expiry time, and resource URI, ensuring the token cannot be modified without invalidating the signature.
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
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
The correct answer is: r and l — Option B is correct because the SAS token needs 'r' (read) to allow reading blob contents and 'l' (list) to allow listing blobs in the container. These two permissions together satisfy the requirement for read-only access without write or delete capabilities.
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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