The answer is that the SAS token was generated with insufficient permissions. This is correct because setting publicAccess to 'None' in an ARM template only disables anonymous public read access to the container, but it does not block or invalidate SAS tokens, which are a separate authorization mechanism. A SAS token grants delegated access based on the permissions explicitly assigned when it was created, so if the token lacks necessary permissions like read, list, or write, or has a restricted scope such as a single blob or a very short expiry, users will receive an access denied error even though the container is private. On the Microsoft Azure Data Fundamentals DP-900 exam, this scenario tests your understanding of the distinction between public access levels and shared access signatures, a common trap where candidates mistakenly blame the publicAccess setting for SAS failures. Remember the memory tip: "Public blocks strangers, SAS needs its own keys"—disabling public access only stops anonymous users, not properly permissioned tokens.
DP-900 Describe an analytics workload on Azure Practice Question
This DP-900 practice question tests your understanding of describe an analytics workload on azure. 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.
Refer to the exhibit. A team is deploying an Azure Storage container using an ARM template. The template sets publicAccess to 'None'. However, after deployment, users report they cannot access data even with a valid SAS token. What is the most likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The SAS token was generated with insufficient permissions
The ARM template sets publicAccess to 'None', which only disables anonymous public access to the container. It does not affect SAS token access. The most likely cause is that the SAS token was generated with insufficient permissions (e.g., missing read, list, or write permissions) or with a restricted scope (e.g., limited to a specific blob or with a short expiry), preventing users from accessing the data even though the container is private.
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.
✗
The container disables SAS tokens by default
Why it's wrong here
Containers do not disable SAS tokens; SAS is controlled at the account level.
✗
The storage account firewall is blocking all traffic
The storage account requires RBAC permissions, not SAS
Why it's wrong here
RBAC is not required for SAS; SAS can be used with account key.
✓
The SAS token was generated with insufficient permissions
Why this is correct
A valid SAS token with proper permissions should work regardless of publicAccess='None'.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'publicAccess = None' with disabling all forms of access, including SAS tokens, but in reality, SAS tokens are a separate authorization mechanism that remains functional on private containers.
Trap categories for this question
Command / output trap
Firewall settings are not shown in the template.
Detailed technical explanation
How to think about this question
When publicAccess is set to 'None', the container is private, meaning anonymous requests are denied. However, SAS tokens (including service SAS, account SAS, or user delegation SAS) are still valid as long as they are properly scoped with the correct permissions (e.g., r, w, d, l) and have not expired. A common misconfiguration is generating a SAS token with only 'Read' permissions but attempting to list blobs (which requires 'List' permission), or using a SAS token with a restricted IP range or service endpoint that does not match the client's request. The SAS token's signature is validated against the stored access policy or the token's parameters, and any mismatch (e.g., missing 's' for service-level access) will result in a 403 error.
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 DP-900 question in full detail.
Describe an analytics workload on Azure — This question tests Describe an analytics workload on Azure — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The SAS token was generated with insufficient permissions — The ARM template sets publicAccess to 'None', which only disables anonymous public access to the container. It does not affect SAS token access. The most likely cause is that the SAS token was generated with insufficient permissions (e.g., missing read, list, or write permissions) or with a restricted scope (e.g., limited to a specific blob or with a short expiry), preventing users from accessing the data even though the container is private.
What should I do if I get this DP-900 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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