Quick Answer
The answer is assigning RBAC roles like Storage Blob Data Contributor and using a Shared Access Signature (SAS) token. RBAC roles provide identity-based access control, allowing you to grant permissions to users, groups, or service principals at the storage account, container, or blob level without exposing account keys, while a SAS token offers delegated, time-limited access with granular permissions such as read, write, or delete, plus constraints like IP restrictions and enforced HTTPS. On the AZ-204 exam, this tests your understanding of the principle of least privilege and the distinction between Azure AD-based authorization and shared key or SAS-based access—a common trap is confusing SAS with account keys or thinking RBAC only works at the subscription level. Remember the memory tip: “Roles for people, SAS for apps”—use RBAC when managing human or service identities, and SAS when you need to grant temporary, scoped access to external clients without exposing your storage account key.
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.
Which TWO of the following are valid approaches to secure access to Azure Blob Storage?
Use a Shared Access Signature (SAS) token
Delegated, time-limited access.
Use Azure Front Door to restrict access
Why wrong: Front Door is a CDN, not an access control mechanism.
Assign RBAC roles like Storage Blob Data Contributor
Fine-grained access control.
Embed storage account keys in client code
Why wrong: Exposes full access; not secure.
Enable public blob access
Why wrong: Public access is insecure.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Use a Shared Access Signature (SAS) token
A Shared Access Signature (SAS) token provides delegated, time-limited access to specific Azure Blob Storage resources without exposing the storage account key. It allows you to grant granular permissions (read, write, delete) and enforce constraints like IP restrictions and allowed protocols (HTTPS only). This is a secure, recommended approach for sharing access with clients or third parties.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use a Shared Access Signature (SAS) token
Why this is correct
Delegated, time-limited access.
Related concept
Read the scenario before looking for a memorised answer.
Use Azure Front Door to restrict access
Why it's wrong here
Front Door is a CDN, not an access control mechanism.
Assign RBAC roles like Storage Blob Data Contributor
Why this is correct
Fine-grained access control.
Related concept
Read the scenario before looking for a memorised answer.
Embed storage account keys in client code
Why it's wrong here
Exposes full access; not secure.
Enable public blob access
Why it's wrong here
Public access is insecure.
Common exam traps
The trap here is that candidates often confuse Azure Front Door's traffic routing and WAF capabilities with actual blob-level authentication, or they mistakenly believe embedding storage account keys is acceptable for client-side applications, ignoring the severe security implications.
Detailed technical explanation
SAS tokens are generated using the HMAC-SHA256 algorithm with the storage account key, and they can be scoped to a single blob, container, or entire account with expiration times down to seconds. RBAC roles like Storage Blob Data Contributor use Azure AD authentication and support fine-grained access control at the storage account, container, or blob level, integrating with managed identities for secure, keyless access. A common real-world scenario is using a user-delegation SAS (secured with Azure AD credentials) for applications that need temporary access without storing keys.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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Develop for Azure storage — study guide chapter
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FAQ
Develop for Azure storage — This question tests Develop for Azure storage — Read the scenario before looking for a memorised answer..
The correct answer is: Use a Shared Access Signature (SAS) token — A Shared Access Signature (SAS) token provides delegated, time-limited access to specific Azure Blob Storage resources without exposing the storage account key. It allows you to grant granular permissions (read, write, delete) and enforce constraints like IP restrictions and allowed protocols (HTTPS only). This is a secure, recommended approach for sharing access with clients or third parties.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Same concept, more angles
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO authentication methods can be used to authorize access to Azure Blob Storage without requiring shared keys?
mediumWhy B: Microsoft Entra ID (formerly Azure AD) authentication and managed identities for Azure resources are both identity-based authentication methods that do not require shared keys. Entra ID authentication uses OAuth 2.0 tokens to authorize access to Blob Storage, while managed identities provide an automatically managed identity in Entra ID for Azure resources, eliminating the need for developers to manage credentials. Both methods support role-based access control (RBAC) for fine-grained permissions.
Last reviewed: Jun 24, 2026
This AZ-204 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-204 exam.
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