AZ-204 Develop for Azure storage Practice Question
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 are building a web application that stores user-uploaded images in Azure Blob Storage. The application requires that images be accessible only via a time-limited URL. Which security mechanism should you use?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Generate a shared access signature (SAS) token for each blob.
A shared access signature (SAS) token provides delegated, time-limited access to a specific blob without exposing the storage account key. By generating a SAS token with an expiration time, you can enforce that the image URL is only valid for a limited period, meeting the requirement exactly. This is the standard Azure mechanism for granting granular, time-bound access to blob storage resources.
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.
✗
Use storage account access keys in the application code.
Why it's wrong here
Access keys provide full account access and cannot be time-limited.
✓
Generate a shared access signature (SAS) token for each blob.
Why this is correct
SAS tokens allow time-limited access to specific blobs.
Related concept
Read the scenario before looking for a memorised answer.
✗
Assign the 'Storage Blob Data Reader' role to the application's managed identity.
Why it's wrong here
Azure RBAC controls management-plane access, not data-plane access with time limits.
✗
Use Azure Key Vault to store and retrieve the storage account key.
Why it's wrong here
Managed identity is used for authentication, not for generating time-limited URLs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse persistent access control methods (like RBAC roles or account keys) with the time-limited, delegated access that only a SAS token provides, leading them to pick options that secure the key but do not enforce an expiration on the URL.
Detailed technical explanation
How to think about this question
A SAS token is generated by signing a string-to-sign with the storage account key, producing a token that includes parameters like 'se' (expiry time), 'sp' (permissions), and 'spr' (allowed protocol). The token is appended to the blob URL as query parameters, and Azure Storage validates the signature and expiry on each request. In a real-world scenario, you might generate a user-delegation SAS using Azure AD credentials for even finer control, but the core mechanism remains the same.
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-204 question in full detail.
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Generate a shared access signature (SAS) token for each blob. — A shared access signature (SAS) token provides delegated, time-limited access to a specific blob without exposing the storage account key. By generating a SAS token with an expiration time, you can enforce that the image URL is only valid for a limited period, meeting the requirement exactly. This is the standard Azure mechanism for granting granular, time-bound access to blob storage resources.
What should I do if I get this AZ-204 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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