Observability Foundation study guide
Observability Foundation · Work through your exam, one topic at a time.
The Observability Foundation℠ credential is offered by DevOps Institute, which is now part of the PeopleCert Group, and is aimed at practitioners and leaders who need to make distributed, cloud-native systems understandable in production. The source describes it as introducing best practices for building full-stack observability toward advancing resilience in a distributed ecosystem, including meaningful traces across temporal topologies, the impact of DevSecOps and AIOps on observability, and a 360-degree view of building mature observability practices. The Observability Foundation study guide has 4 sections and about 2,829 words.
01Observability Culture and Principles
This domain tests whether you can separate monitoring from observability, state what each of the three pillars is actually for, and describe the cultural practices - SLOs, blameless postmortems, developer-owned instrumentation - that turn telemetry into answers. Monitoring watches a known set of signals against known failure modes: dashboards, thresholds, alerts.
441 words, about 2 min02OpenTelemetry Standards
This domain tests practical knowledge of OpenTelemetry (OTel): the API/SDK/Collector split, OTLP, semantic conventions, context propagation, and when to use agent versus gateway collectors. A CNCF project created in 2019 by merging OpenTracing (API-only) and OpenCensus (SDK plus agent).
403 words, about 2 min03Distributed Tracing: Traces and Spans
This domain tests whether you can read a trace correctly: identifier formats, span fields and kinds, context propagation, and how to find the critical path. A trace is a directed acyclic graph of spans sharing a trace id - 16 bytes, written as 32 hex characters.
421 words, about 2 min04Full-Stack Observability
This domain tests whether you can reason across every tier a request touches - browser or device, edge, network, service, datastore - and the business layer above them, and whether you can correlate those tiers into one narrative. Client and RUM - page load and Core Web Vitals, JavaScript errors, mobile crashes, session replay.
1,564 words, about 8 min