1. What is the difference between distributed tracing and metrics? 
  2. What functionality do distributed tracing systems usually provide?
  3. What parts of the system are automatically traced in MicroProfile OpenTracing?
  4. Which tags are added for every REST request by MicroProfile OpenTracing?
  5. How can explicit instrumentation be added to the business code?
  6. What are scopes in Metrics and what is their rationale?
  7. What determines the output format of a REST request to the Metrics API?
  8. What ways are available to export metrics within a user application?

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