AZ-104 Implement and Manage Storage Practice Question
This AZ-104 practice question tests your understanding of implement and manage storage. 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.
A web app running in Azure App Service must upload files to a blob container. The team wants to avoid storing any secrets in application settings and wants the app to authenticate without a password or access key. What should the administrator configure?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable a system-assigned managed identity for the app and grant it a storage data role
Option B is correct because a system-assigned managed identity allows the App Service to authenticate to Azure Storage without storing any secrets. By granting the identity the 'Storage Blob Data Contributor' role via Azure RBAC, the app can upload files using Azure AD authentication, eliminating the need for passwords or access keys.
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.
✗
Store the storage account key in the app configuration and use it from the application
Why it's wrong here
Account keys work, but they create secret management overhead and are not credential-free.
✓
Enable a system-assigned managed identity for the app and grant it a storage data role
Why this is correct
Managed identity allows the app to authenticate to Storage with Microsoft Entra ID and no stored secret.
Related concept
Read the scenario before looking for a memorised answer.
✗
Create an anonymous public container so the app can upload without authentication
Why it's wrong here
Anonymous access is insecure and does not provide the required controlled upload authentication.
✗
Use a shared access signature generated from the storage account root key
Why it's wrong here
A SAS is temporary, but generating it from an account key still depends on a stored secret.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse managed identities with SAS tokens or access keys, assuming any form of shared secret is acceptable, but the question explicitly requires no secrets in application settings and no password or access key.
Detailed technical explanation
How to think about this question
Under the hood, a system-assigned managed identity creates a service principal in Azure AD tied to the App Service resource. The app uses the Azure Identity SDK to obtain an OAuth 2.0 token from the Azure Instance Metadata Service (IMDS) endpoint, then passes it as a Bearer token in the Authorization header to Blob Storage. This approach supports role-based access control (RBAC) with granular permissions, and the token is automatically rotated, eliminating key rotation overhead.
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.
Implement and Manage Storage — This question tests Implement and Manage Storage — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable a system-assigned managed identity for the app and grant it a storage data role — Option B is correct because a system-assigned managed identity allows the App Service to authenticate to Azure Storage without storing any secrets. By granting the identity the 'Storage Blob Data Contributor' role via Azure RBAC, the app can upload files using Azure AD authentication, eliminating the need for passwords or access keys.
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.
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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