Exam AZ-204 topic 2 question 39 discussion

Option B, On the current SpanContext, set the TraceId to the customer ID for the signed in user, is not correct because the TraceId is a unique identifier for a trace, and it is not meant to be used to store contextual information about the request. Option C, Set the header Ocp-Apim-Trace to the customer ID for the signed in user, is not correct because the Ocp-Apim-Trace header is used by Azure API Management to track requests as they pass through the API gateway, and it is not related to application instrumentation or tracing. Option D, Create a new SpanContext with the TraceFlags value set to the customer ID for the signed in user, is not correct because the TraceFlags value is used to indicate the state of the trace and is not meant to be used to store contextual information about the request."

tracestate: Carries system-specific tracing context. It is a part of correlation headers using W3C TraceContext. Correlation-Context is deprecated. But this is the same as the Request-Context which is currently in use.

Agree https://learn.microsoft.com/en-us/azure/azure-monitor/app/opentelemetry-enable?tabs=java#set-the-user-id-or-authenticated-user-id

This answer is useless without any explanation. Come on guys this is annoying and NOT helpfull. Please clarify WHY it is the correct answer. Now we have a group of people stating A is correct and an other group stating B is correct. How are we suppose to know what is correct?

"The value of trace-id SHOULD be globally unique. One recommended method to ensure global uniqueness, as well as to address some privacy and security considerations, to a satisfactory degree of certainty is to randomly (or pseudo-randomly) generate the trace-id. Implementers SHOULD use a trace-id generation method which randomly (or pseudo-randomly) generates at least the right-most 7 bytes of the ID." by specs ChatGPT is lying (as usual) that you can't use it to request, but you can't use TraceId with all operations throughout the overall system