The answer is yes, the configuration is correct because setting 'publicAccess': 'None' in an ARM template for a blob container explicitly blocks all anonymous access, ensuring that only authorized Azure AD identities can interact with the container. This works because Azure Blob Storage enforces Azure AD authentication by default for any request that does not carry anonymous credentials, so no additional settings are needed to enforce RBAC-based access. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of how ARM template blob container publicAccess None prevents anonymous access while relying on the built-in Azure AD authorization model—a common trap is assuming you must separately disable container-level anonymous access or enable RBAC, but both are already handled by the 'None' setting and default Azure AD behavior. Remember the mnemonic: "None means no anonymous, AD is automatic."
SC-100 Practice Question: Design security solutions for applications and data
This SC-100 practice question tests your understanding of design security solutions for applications and data. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 reviewing an ARM template snippet that creates a blob container. The security team requires that the container be accessible only via authorized Azure AD identities, not via anonymous access. Based on the exhibit, is the configuration correct?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Yes, the setting 'publicAccess': 'None' prevents anonymous access, and Azure AD authentication is available by default
Option B is correct because 'publicAccess': 'None' ensures no anonymous access, and Azure AD authentication is the default for authorized identities. Option A is wrong because the configuration is correct. Option C is wrong because container-level access is not a separate setting. Option D is wrong because RBAC is already the default for authorized identities; no additional action needed.
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.
✗
Yes, but you also need to disable shared key access
Why it's wrong here
Shared key access is separate; the requirement is only about anonymous access.
✗
No, you need to set 'publicAccess' to 'Blob' to restrict access
Why it's wrong here
Setting to 'Blob' would allow anonymous read access for blobs, which is not desired.
✓
Yes, the setting 'publicAccess': 'None' prevents anonymous access, and Azure AD authentication is available by default
Why this is correct
Setting publicAccess to None blocks anonymous access. Azure AD authentication is always an option for authorized users.
Related concept
Read the scenario before looking for a memorised answer.
✗
No, you must also configure a firewall rule to restrict access to Azure AD users
Why it's wrong here
Firewall rules control network access, not authentication. The requirement is about anonymous access, which is already blocked.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 SC-100 question in full detail.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Design security solutions for applications and data — This question tests Design security solutions for applications and data — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Yes, the setting 'publicAccess': 'None' prevents anonymous access, and Azure AD authentication is available by default — Option B is correct because 'publicAccess': 'None' ensures no anonymous access, and Azure AD authentication is the default for authorized identities. Option A is wrong because the configuration is correct. Option C is wrong because container-level access is not a separate setting. Option D is wrong because RBAC is already the default for authorized identities; no additional action needed.
What should I do if I get this SC-100 question wrong?
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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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