The correct answer is to invite the user as a guest in your Microsoft Entra ID tenant and assign the Storage Blob Data Reader role to the container. This solution is correct because it leverages cross-tenant RBAC access to Azure Blob Storage container by using Microsoft Entra B2B collaboration, which allows you to grant granular permissions without managing shared keys or SAS tokens. By scoping the role assignment directly to the container, you minimize administrative overhead and follow the principle of least privilege. On the AZ-204 exam, this scenario tests your understanding of Azure RBAC versus shared access signatures for cross-tenant scenarios, with a common trap being to choose SAS tokens or access keys instead. Remember the memory tip: “Guest plus role at the container scope” — if you need cross-tenant access with RBAC, invite the external user as a guest, then assign the role at the narrowest scope required.
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 need to grant a user from another Microsoft Entra ID tenant access to a specific blob container in your Azure Storage account. The solution must use Azure RBAC and minimize administrative overhead. What should you do?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "minimum / minimize"
Why it matters: Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Invite the user as a guest in your Microsoft Entra ID tenant and assign the Storage Blob Data Reader role to the container.
Option B is correct because it uses Azure RBAC to grant cross-tenant access by inviting the user as a guest in your Microsoft Entra ID tenant, then assigning the Storage Blob Data Reader role at the container scope. This minimizes administrative overhead by leveraging existing role assignments without managing shared keys or SAS tokens, and it follows the principle of least privilege by scoping access to a specific container.
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.
✗
Generate a shared access signature (SAS) with read permissions for the container.
Why it's wrong here
SAS does not use Azure RBAC.
✓
Invite the user as a guest in your Microsoft Entra ID tenant and assign the Storage Blob Data Reader role to the container.
Why this is correct
B2B collaboration enables cross-tenant RBAC.
Clue confirmation
The clue word "minimum / minimize" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Add the user as a Storage Blob Data Reader at the storage account level.
Why it's wrong here
Granting at account level gives access to all containers.
✗
Share the storage account key with the user.
Why it's wrong here
Storage account keys provide full access, not RBAC.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse RBAC with shared access signatures or account keys, assuming that any cross-tenant access requires a SAS token, when in fact Azure AD B2B collaboration with RBAC is the correct, low-overhead solution.
Detailed technical explanation
How to think about this question
Under the hood, Azure RBAC for Blob Storage uses Azure AD authentication with OAuth 2.0 tokens; when a guest user is invited, their identity is resolved via cross-tenant trust, and the role assignment is stored in the resource's Azure RBAC policy. The Storage Blob Data Reader role includes the 'Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read' action, which is evaluated at the container scope when the role is assigned there. A real-world scenario is a partner company needing read-only access to a specific audit log container; using guest invites and RBAC avoids the complexity of managing SAS tokens or exposing the account key.
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: Invite the user as a guest in your Microsoft Entra ID tenant and assign the Storage Blob Data Reader role to the container. — Option B is correct because it uses Azure RBAC to grant cross-tenant access by inviting the user as a guest in your Microsoft Entra ID tenant, then assigning the Storage Blob Data Reader role at the container scope. This minimizes administrative overhead by leveraging existing role assignments without managing shared keys or SAS tokens, and it follows the principle of least privilege by scoping access to a specific container.
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.
Are there clue words in this question I should notice?
Yes — watch for: "minimum / minimize". Asks for the least resource use — fewest addresses, smallest subnet, lowest overhead. Eliminate over-provisioned options even if they would technically work.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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