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 grant access to a blob stored in Azure Blob Storage for 30 minutes to a user who does not have an Azure account. Which security mechanism should you use?
Azure RBAC roles
Why wrong: Requires an Azure AD user account.
Storage account access keys
Why wrong: Provide full access, not time-limited.
Managed identity
Why wrong: Used for Azure resources, not external users.
Shared Access Signature (SAS) token
Time-limited access without Azure account.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Shared Access Signature (SAS) token
A Shared Access Signature (SAS) token is the correct choice because it provides delegated, time-limited access to a specific blob resource without requiring the user to have an Azure account. You can set the token's expiry to 30 minutes, granting temporary access via a URI that includes the necessary authentication parameters. This mechanism is designed for scenarios where you need to grant granular, time-bound access to external users or clients.
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.
Azure RBAC roles
Why it's wrong here
Requires an Azure AD user account.
Storage account access keys
Why it's wrong here
Provide full access, not time-limited.
Managed identity
Why it's wrong here
Used for Azure resources, not external users.
Shared Access Signature (SAS) token
Why this is correct
Time-limited access without Azure account.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse SAS tokens with storage account access keys, mistakenly thinking keys can be scoped or time-limited, or they assume RBAC can be used for external users without understanding the Azure AD dependency.
Detailed technical explanation
A SAS token is generated using the storage account key or a user delegation key, and it includes parameters such as 'sv' (service version), 'se' (expiry time), 'sp' (permissions like read), and a signature computed via HMAC-SHA256. The token is appended to the blob URL, allowing the bearer to perform specified operations until the expiry time. In real-world scenarios, SAS tokens are commonly used for secure file sharing, such as allowing a customer to upload a document to a specific container for exactly 30 minutes.
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: Shared Access Signature (SAS) token — A Shared Access Signature (SAS) token is the correct choice because it provides delegated, time-limited access to a specific blob resource without requiring the user to have an Azure account. You can set the token's expiry to 30 minutes, granting temporary access via a URI that includes the necessary authentication parameters. This mechanism is designed for scenarios where you need to grant granular, time-bound access to external users or clients.
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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