The answer is to create a custom RBAC role with blob dataActions only and assign it at the container scope. This is correct because Azure RBAC separates data plane permissions (blob read, write, delete) from management plane permissions (account keys, settings), and by scoping the role to a specific container, you enforce the principle of least privilege. On the AZ-104 exam, this scenario tests your understanding of custom role definitions and scope granularity, often appearing as a trap where candidates mistakenly assign a built-in role like Storage Blob Data Contributor at the resource group level, which would grant access to all containers. A common memory tip is to remember that dataActions are for blob data, while Actions are for management operations; if the service principal doesn’t need keys or account settings, stick strictly to dataActions. Think of it as “container-locked blob permissions” to avoid over-scoping.
AZ-104 Manage Azure Identities and Governance Practice Question
This AZ-104 practice question tests your understanding of manage azure identities and governance. 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.
A storage automation service principal must upload, read, and delete blob data in one container by using Microsoft Entra authentication. It must not manage storage account settings, keys, or other containers. Which approach is best?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create a custom role with blob dataActions only and assign it at the container scope.
Option B is correct because it creates a custom Azure RBAC role with only the required blob data actions (e.g., Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read, write, delete) and assigns it at the container scope. This ensures the service principal can upload, read, and delete blobs in that specific container using Microsoft Entra authentication, without any permissions to manage storage account settings, keys, or other containers.
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.
✗
Assign Storage Account Contributor at the resource group scope.
Why it's wrong here
This grants management-plane control over the storage account and is much broader than needed.
✓
Create a custom role with blob dataActions only and assign it at the container scope.
Why this is correct
This allows data access while avoiding storage account management permissions and limiting scope.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Assign Reader and give the service principal a storage account access key.
Why it's wrong here
This introduces stored credentials and does not follow the Entra-based least-privilege requirement.
✗
Assign Contributor at the subscription scope and restrict access with naming conventions.
Why it's wrong here
Naming conventions do not enforce security, and subscription scope is unnecessarily broad.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse built-in roles like Storage Blob Data Contributor (which works at the storage account scope) with the need for a custom role at the container scope, or they mistakenly think that assigning a management role like Contributor combined with an access key satisfies the requirement for Microsoft Entra authentication and container-specific access.
Detailed technical explanation
How to think about this question
Azure RBAC custom roles allow fine-grained permission assignment using specific action strings under the Microsoft.Storage namespace, such as Microsoft.Storage/storageAccounts/blobServices/containers/blobs/delete. Assigning the role at the container scope (e.g., /subscriptions/{sub}/resourceGroups/{rg}/providers/Microsoft.Storage/storageAccounts/{account}/blobServices/default/containers/{container}) ensures the principal can only interact with blobs in that container, not the account-level settings or other containers. This approach leverages Microsoft Entra ID (formerly Azure AD) for authentication, avoiding shared access keys and supporting conditional access policies.
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-104 question in full detail.
Manage Azure Identities and Governance — This question tests Manage Azure Identities and Governance — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Create a custom role with blob dataActions only and assign it at the container scope. — Option B is correct because it creates a custom Azure RBAC role with only the required blob data actions (e.g., Microsoft.Storage/storageAccounts/blobServices/containers/blobs/read, write, delete) and assigns it at the container scope. This ensures the service principal can upload, read, and delete blobs in that specific container using Microsoft Entra authentication, without any permissions to manage storage account settings, keys, or other containers.
What should I do if I get this AZ-104 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: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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