- A
Upload a client certificate to the Function app's certificate store. Use ClientCertificateCredential to authenticate to Key Vault.
Why wrong: Incorrect: requires managing certificate, not fully secret-free.
- B
Use Key Vault references in application settings. Store the Key Vault URI in app settings and let the Functions runtime resolve secrets.
Why wrong: Incorrect: Key Vault references still require the Function app to have managed identity, but the question asks for code-based retrieval using libraries; also references are for app settings, not for code.
- C
Enable system-assigned managed identity on the Function app. Grant the identity 'Get' and 'List' permissions on Key Vault secrets. Use DefaultAzureCredential in code to authenticate to Key Vault.
Correct: no secrets stored, managed identity used.
- D
Create a user-assigned managed identity, assign it to the Function app, and store its client ID in application settings. Grant the identity permissions to Key Vault. Use ClientSecretCredential with the client ID and a secret.
Why wrong: Incorrect: storing client ID is not fully secret-free; using ClientSecretCredential requires a secret.
Quick Answer
The correct answer is to enable a system-assigned managed identity on the Function app, grant it 'Get' and 'List' permissions on Key Vault secrets, and use DefaultAzureCredential in the code. This approach works because DefaultAzureCredential automatically attempts authentication via the managed identity endpoint when the code runs in Azure, eliminating any need for stored secrets, client IDs, or certificates. On the AZ-204 exam, this scenario tests your understanding of secret-free authentication using Azure.Identity and Azure.Security.KeyVault.Secrets libraries, a core pattern for managed identity authentication from Azure Functions to Key Vault. A common trap is choosing options that still require a client ID or certificate thumbprint in configuration, which violates the "no secrets stored" requirement. Remember the mnemonic: "S-G-L-D" — System-assigned, Grant Get/List, use DefaultAzureCredential.
AZ-204 Practice Question: Connect to and consume Azure services and third-party services
This AZ-204 practice question tests your understanding of connect to and consume azure services and third-party services. 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.
Contoso Ltd. is migrating a legacy on-premises application to Azure. The application processes customer orders and sends confirmation emails. The new solution must use Azure Functions with an HTTP trigger to receive orders, store order data in Azure Cosmos DB, and send emails via SendGrid. Security requirements: All connections must use managed identities where possible. No secrets should be stored in code or configuration files. Cosmos DB and SendGrid API keys must be retrieved at runtime from Azure Key Vault. The Azure Function app must be able to access Key Vault without storing any connection strings or secrets in application settings. The development team plans to use the Azure.Identity and Azure.Security.KeyVault.Secrets libraries. Which approach should the team use to authenticate to Key Vault?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Enable system-assigned managed identity on the Function app. Grant the identity 'Get' and 'List' permissions on Key Vault secrets. Use DefaultAzureCredential in code to authenticate to Key Vault.
Enable system-assigned managed identity on the Function app, then grant that identity 'Get' and 'List' permissions on the Key Vault secrets. The code uses DefaultAzureCredential to authenticate. Option A is correct. Option B requires storing a client ID, not fully secret-free. Option C requires storing certificate thumbprint. Option D requires storing connection string.
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.
- ✗
Upload a client certificate to the Function app's certificate store. Use ClientCertificateCredential to authenticate to Key Vault.
Why it's wrong here
Incorrect: requires managing certificate, not fully secret-free.
- ✗
Use Key Vault references in application settings. Store the Key Vault URI in app settings and let the Functions runtime resolve secrets.
Why it's wrong here
Incorrect: Key Vault references still require the Function app to have managed identity, but the question asks for code-based retrieval using libraries; also references are for app settings, not for code.
- ✓
Enable system-assigned managed identity on the Function app. Grant the identity 'Get' and 'List' permissions on Key Vault secrets. Use DefaultAzureCredential in code to authenticate to Key Vault.
Why this is correct
Correct: no secrets stored, managed identity used.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a user-assigned managed identity, assign it to the Function app, and store its client ID in application settings. Grant the identity permissions to Key Vault. Use ClientSecretCredential with the client ID and a secret.
Why it's wrong here
Incorrect: storing client ID is not fully secret-free; using ClientSecretCredential requires a secret.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
Identify which AZ-204 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.
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Connect to and consume Azure services and third-party services — study guide chapter
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Connect to and consume Azure services and third-party services practice questions
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Microsoft Azure Developer Associate AZ-204 study guide
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FAQ
Questions learners often ask
What does this AZ-204 question test?
Connect to and consume Azure services and third-party services — This question tests Connect to and consume Azure services and third-party services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable system-assigned managed identity on the Function app. Grant the identity 'Get' and 'List' permissions on Key Vault secrets. Use DefaultAzureCredential in code to authenticate to Key Vault. — Enable system-assigned managed identity on the Function app, then grant that identity 'Get' and 'List' permissions on the Key Vault secrets. The code uses DefaultAzureCredential to authenticate. Option A is correct. Option B requires storing a client ID, not fully secret-free. Option C requires storing certificate thumbprint. Option D requires storing connection string.
What should I do if I get this AZ-204 question wrong?
Identify which AZ-204 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.
About these practice questions
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Last reviewed: Jun 20, 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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