AZ-204 Quiz

Application Insights

Question:

You have a very old Azure function app and you want to integrate it with Application Insights to save informational log data. Which tasks should you perform?

Add Azure App Insights Service Principle Id to the App settings.
Call the TrackEvent method of the TelemetryClient class.
Store the name of the instrumentation key in an app setting named APPINSIGHTS_INSTRUMENTATIONKEY.
Add the Azure App Insights into function App using RBAC.
Manually enable Application Insights in the function app.
Call the LogInformation method of the ILogger class.
Store a key named APPINSIGHTS_INSTRUMENTATIONKEY as a secret named applicationinsights in an Azure Key Vault.
Add the function App into Azure App Insights using RBAC.
Disable built-in logging in the function app.

Note: This question has more than one correct answer

Answer:

Application Insights may have to be manually enabled for old functions. To send data, you need the key named APPINSIGHTS_INSTRUMENTATIONKEY. ILogger is used to log to Application Insights (not TelemetryClient!).
Azure function apps use app settings to find the Application Insights key, not secrets from the Key Vault.

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Exam revision: April 11, 2025