Question 1easymultiple choice
Full question →easymultiple choiceObjective-mapped
You are building an Azure Logic App that needs to call an external REST API. The API requires an API key to be passed in the 'X-API-Key' header. You have stored the API key as a secret in Azure Key Vault. The Logic App uses a managed identity that has read access to the Key Vault secret. You want to retrieve the API key securely at runtime and include it in the HTTP request. Which approach should you use?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
A
Best answer
Add a 'Get secret' action from Key Vault to retrieve the secret, then use the 'HTTP' action and set the 'X-API-Key' header to the secret value using a dynamic expression.
This is the correct approach. The Logic App can use a managed identity to authenticate to Key Vault, retrieve the secret via the 'Get secret' action, and then use that value in the HTTP request header.
B
Distractor review
Configure the HTTP action to use managed identity authentication and set the 'Audience' to the Key Vault URL. This will automatically pass the API key as the Authorization header.
Managed identity authentication for an HTTP action is used for authenticating to Microsoft Entra ID-protected resources, not for passing an arbitrary API key. The API key must be explicitly retrieved and placed in the header.
C
Distractor review
Store the API key in an Azure App Service application setting and reference it from the Logic App using the 'appsetting' function.
This approach is less secure because application settings are not designed for highly sensitive secrets and may be visible in configuration files. Key Vault is the recommended secret store.
D
Distractor review
Use the 'Invoke an HTTP endpoint' action with Application Insights dependency tracking enabled. The API key is automatically logged by Application Insights.
Application Insights does not automatically inject API keys. It tracks dependencies but does not handle authentication or secret retrieval.
Common exam trap
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Technical deep dive
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Related practice questions
Related AZ-204 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
An application stores customer invoices in Azure Blob Storage. Deleted blobs must be recoverable for 14 days. What should be enabled?
Question 2
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Question 3
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Question 4
You are developing a web app that authenticates users via Microsoft Entra ID. The app needs to read the user's profile and send emails on their behalf. You want to minimize user consent prompts. Which OAuth 2.0 grant type should you use?
Question 5
You are developing an Azure Function that processes messages from an Azure Service Bus queue. The function uses a Service Bus queue trigger and runs on a Consumption Plan. The queue receives a high volume of messages in bursts. You need to ensure that the function scales out to handle the load but does not exceed 10 concurrent instances. Which configuration should you apply?
Question 6
You are monitoring an Azure App Service using Application Insights. You notice that the server response time is high for certain requests. You need to drill down to see which external dependencies (like databases or APIs) are causing the delay. Which Application Insights feature should you use?
FAQ
Questions learners often ask
What does this AZ-204 question test?
Authentication checks who the user is.
What is the correct answer to this question?
The correct answer is: Add a 'Get secret' action from Key Vault to retrieve the secret, then use the 'HTTP' action and set the 'X-API-Key' header to the secret value using a dynamic expression. — The recommended approach is to use the 'Get secret' action from Key Vault within the Logic App, then pass the secret value into the HTTP action header. This correctly retrieves the secret securely and uses it in the request.
What should I do if I get this AZ-204 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
Discussion
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