What values are accessible to the Logger component at the end of the main flow?

Refer to the exhibits.

The main flow contains an HTTP Request in the middle of the flow. The HTTP Listeners and HTTP Request use default configurations.

A web client submits a request to the main flow’s HTTP Listener that includes query parameters for the pedigree of the piano.

What values are accessible to the Logger component at the end of the main flow?
A . payload
B . payload
pedigree query params
C . payload producer var
D . payload
pedigree query params producer var

Answer: C

Explanation:

In this case as outbound call is made using HTTP: POST /child, all attributes will be replaced by this invocation. Hence query parameter will not be accessible at logger. Hence correct answer is option 2