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Guide for OTCA: OpenTelemetry Certified Associate

Quiz OTCA: OpenTelemetry Certified Associate

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Quiz

1/10
Fundamentals of Observability
A team has dashboards and threshold alerts for CPU, memory, and error rate on every service. During an incident, users report slow checkouts only for customers in one region who use a specific payment provider, and none of the predefined dashboards reveal the cause. Which statement best describes the gap?
Select the answer
1 correct answer
A.
The team only needs to scrape the existing metrics more frequently to find the issue
B.
The team has observability but lacks monitoring, because the alerts did not fire
C.
The team has monitoring for known failure modes but lacks observability, meaning the ability to ask new, unanticipated questions of rich, high-context telemetry
D.
Monitoring and observability are synonyms, so the problem is only a misconfigured alert threshold

Quiz

2/10
The OpenTelemetry API and SDK
You maintain an open-source database client library and want to add OpenTelemetry tracing so that your users get spans out of the box. Which dependency strategy follows OpenTelemetry guidance?
Select the answer
1 correct answer
A.
Depend on the OpenTelemetry SDK and an OTLP exporter so spans are always exported
B.
Depend only on the OpenTelemetry API and let the application owner choose and configure the SDK
C.
Depend on the OpenTelemetry Collector client so spans are sent directly to a Collector
D.
Bundle a private copy of the SDK so your library does not conflict with the application's version

Quiz

3/10
The OpenTelemetry Collector
A platform team is debating whether applications should export telemetry directly to their observability vendor or send it to an OpenTelemetry Collector first. Which statement BEST describes the main benefit of placing a Collector between the applications and the backend?
Select the answer
1 correct answer
A.
The Collector is required by the OTLP specification, because SDKs cannot export OTLP directly to any backend.
B.
The Collector decouples applications from backends, letting teams centralize processing such as batching, retries, enrichment, filtering and routing, and change destinations without redeploying application code.
C.
The Collector replaces the need for SDK instrumentation by automatically generating spans for every process on the host.
D.
The Collector stores telemetry long term and provides a query UI, so a separate backend is no longer needed.

Quiz

4/10
Maintaining and Debugging Observability Pipelines
An application container sends OTLP to a Collector container named "otel-collector" on the same Docker network. The Collector starts without errors, but the application logs "connection refused" on every export. The Collector config contains: receivers: otlp: protocols: grpc: endpoint: localhost:4317. What is the most likely fix?
Select the answer
1 correct answer
A.
Change the application exporter to use port 4318 instead of 4317
B.
Add the otlp receiver to the extensions list under service
C.
Change the receiver endpoint to 0.0.0.0:4317 so it listens on all interfaces of the container
D.
Set the application's OTEL_EXPORTER_OTLP_PROTOCOL to http/json

Quiz

5/10
Fundamentals of Observability
A team wants to pass a customer tier value (for example tier=premium) from the edge service to every downstream service in a request path, so that each service can read it and optionally add it to its own telemetry. Which OpenTelemetry concept is designed for this purpose?
Select the answer
1 correct answer
A.
Baggage
B.
Span events
C.
Resource attributes
D.
Exemplars

Quiz

6/10
The OpenTelemetry API and SDK
A Java application includes a library instrumented with the OpenTelemetry API, but the application itself never installs or registers an OpenTelemetry SDK (and no agent is attached). What happens when the library calls tracer.spanBuilder("query").startSpan() and later span.end()?
Select the answer
1 correct answer
A.
The call throws an exception because no TracerProvider is registered
B.
Spans are buffered in memory until an SDK is registered, then exported retroactively
C.
Spans are written to standard output by a built-in fallback console exporter
D.
The API returns no-op implementations, so the calls succeed but nothing is recorded or exported

Quiz

7/10
The OpenTelemetry Collector
A Collector configuration defines receivers otlp, processors batch and attributes/env, and exporters otlp. The service section contains only: pipelines: traces: receivers: [otlp], processors: [batch], exporters: [otlp]. What happens to the attributes/env processor?
Select the answer
1 correct answer
A.
It runs automatically on all pipelines because every defined processor is applied globally.
B.
The Collector fails to start because every defined component must be used in a pipeline.
C.
It is configured but not enabled, so it has no effect on the data flowing through the traces pipeline.
D.
It runs after the batch processor because unreferenced processors are appended to the end of each pipeline.

Quiz

8/10
Maintaining and Debugging Observability Pipelines
A service is configured with OTEL_EXPORTER_OTLP_PROTOCOL=http/protobuf and OTEL_EXPORTER_OTLP_ENDPOINT=http://collector:4317. The Collector has both OTLP protocols enabled on their default ports. Exports fail with HTTP protocol errors. What is the problem?
Select the answer
1 correct answer
A.
The client speaks OTLP/HTTP but is sending to the default gRPC port; the endpoint should use port 4318
B.
http/protobuf is not a valid value; the only valid value is grpc
C.
OTLP/HTTP requires TLS, so the scheme must be https
D.
The Collector must be restarted with the otlphttp receiver instead of the otlp receiver

Quiz

9/10
Fundamentals of Observability
Which statement correctly describes the current maturity of OpenTelemetry signals in the specification?
Select the answer
1 correct answer
A.
Only traces are stable; metrics and logs are still experimental in every part of the specification
B.
Traces, metrics, and logs are all still in development, and no part of the specification offers stability guarantees
C.
Profiles are stable, while logs are still in alpha because the log data model has not been defined
D.
Traces, metrics, and logs have stable specification components (for example the tracing and metrics API and SDK, the log data model, and the Logs Bridge API), while profiles is a newer signal that is still in development

Quiz

10/10
The OpenTelemetry API and SDK
In an instrumentation library that traces calls made with a popular HTTP client, a developer obtains a Tracer from the TracerProvider. Which set of values identifies the instrumentation scope of that Tracer?
Select the answer
1 correct answer
A.
Name of the instrumentation library, its version, and optionally a schema URL and scope attributes
B.
The service.name, service.version and deployment.environment of the application
C.
The trace ID, span ID and trace flags of the current context
D.
The exporter endpoint, protocol and headers used to send the spans
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  • Quiz name:OTCA: OpenTelemetry Certified Associate
  • Total number of questions:69
  • Number of questions for the test:50
  • Pass score:80%

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