AZ-204 Certification Practice Question #58

Question

You are developing a web application that runs as an Azure Web App. The web application stores data in Azure SQL Database and stores files in an Azure
Storage account. The web application makes HTTP requests to external services as part of normal operations.
The web application is instrumented with Application Insights. The external services are OpenTelemetry compliant.
You need to ensure that the customer ID of the signed in user is associated with all operations throughout the overall system.
What should you do?

Accepted Answer

To associate custom properties (such as a customer ID) across distributed operations in a system monitored by OpenTelemetry-compliant tools (like Application Insights), you propagate user-defined context properties. In OpenTelemetry, these custom key-value pairs are stored and passed through the distributed system using the `CorrelationContext` (also referred to as Baggage). This ensures that the context is automatically propagated across HTTP calls and downstream services. Option B is incorrect because `TraceId` is a globally unique random identifier for the trace and cannot be overwritten with a customer ID. Option C is incorrect because `Ocp-Apim-Trace` is specific to Azure API Management diagnostics and does not propagate custom application telemetry. Option D is incorrect because `TraceFlags` indicates options like sampling details, not user contexts.

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