4.4 Capturing and Analyzing Distributed Traces PROFESSIONAL-CLOUD-DEVOPS-ENGINEER Practice Questions (Page 1)

Questions 1–5

1. 1foundation · medium

   Why is trace context propagation essential in a microservices architecture?

   • AIt correlates spans from different services into a single trace
   • BIt ensures all services use the same logging library
   • CIt encrypts trace data in transit
   • DIt allows each service to generate its own independent trace ID
   Reveal Solution Discussion Select an answer first
2. 2foundation · medium

   Which standard defines the HTTP headers used to propagate trace context across services?

   • AW3C Trace Context
   • BOpenTelemetry Protocol (OTLP)
   • CHTTP/2
   • DCloud Trace API
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   You are adding OpenTelemetry tracing to a Python service. The service uses a popular web framework and also makes calls to a database. You want to minimize code changes while still capturing spans for incoming HTTP requests and database calls. What should you do?

   • AWrite a custom middleware that manually propagates trace context and creates spans for every function call.
   • BConfigure the service to export traces to Cloud Trace and rely on Cloud Trace's auto-instrumentation for all Python services.
   • CInstall the appropriate OpenTelemetry instrumentation libraries for the web framework and database client.
   • DUse the OpenTelemetry Python SDK to manually create spans around each database call and HTTP handler.
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A request flows through Service A, which calls Service B over HTTP, and Service B calls Service C over a message queue. You notice that the trace waterfall shows Service A and Service B in the same trace, but Service C's spans are in a separate trace. What is the most likely reason?

   • AService B is not propagating the trace context when it sends the message to Service C.
   • BService C is not instrumented with OpenTelemetry.
   • CThe message queue is not supported by OpenTelemetry automatic instrumentation.
   • DService C is using a different OpenTelemetry SDK version than Service A and B.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   While examining a trace, you see a span with status code ERROR and an event that says 'exception' with a stack trace. The span duration is normal. What does this indicate?

   • AThe operation succeeded but was slow due to the exception handling.
   • BThe operation is still in progress and the exception is a warning.
   • CThe operation failed and caused the entire trace to be marked as failed.
   • DThe operation failed, but the error did not cause significant delay.
   Reveal Solution Discussion Select an answer first