KCNA Cloud Native Observability Practice Question
Which open-source project provides a unified standard for collecting and exporting telemetry data (metrics, logs, and traces) from applications?
⚠ Common exam trap
KCNA often tests the difference between a telemetry standard and a backend — candidates pick Prometheus or Jaeger because they recognize the names, missing that the question asks for the unified collection/export standard, which is OpenTelemetry.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
OpenTelemetry
OpenTelemetry (OTel) is a CNCF project that provides a vendor-neutral, unified standard — APIs, SDKs, and the Collector — for instrumenting applications to emit metrics, logs, and traces. It solves the fragmentation problem where each backend required its own agent and format. OTel is the answer when the question asks for a unified telemetry collection and export standard.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Prometheus
Why it's wrong here
Prometheus scrapes and stores time-series metrics only; it handles neither logs nor traces and defines no unified cross-signal standard. It is tempting because it is the default Kubernetes monitoring tool, and would be correct when collecting numeric metrics such as CPU usage or request counts and alerting on thresholds.
- ✓
OpenTelemetry
Why this is correct
OpenTelemetry is the CNCF project supplying vendor-neutral APIs, SDKs and specifications for metrics, logs and traces together, so it satisfies the stem's requirement for one unified standard covering all three telemetry signals rather than separate per-signal agents.
- ✗
Jaeger
Why it's wrong here
Jaeger is a distributed tracing backend only; it stores and visualises spans and cannot collect metrics or logs, nor does it define a unified telemetry standard. It is tempting because it is a CNCF observability project, and would be correct when tracing request flow across microservices to diagnose latency in a specific transaction path.
- ✗
Fluentd
Why it's wrong here
Fluentd is a log collection and forwarding agent; it processes log events only, not metrics or traces, so it cannot serve as a unified telemetry standard. It is tempting because it is a CNCF project handling observability data, and would be correct when shipping and parsing application log streams to a central store.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CNCF exam blueprint
This KCNA practice question is part of Courseiva's free CNCF certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the KCNA exam.