Observability KCNA Practice Questions (Page 5)

Questions 21–25

1. 21application · medium · select all that apply

   A development team wants to adopt OpenTelemetry to instrument their services. They want to generate traces and metrics. Which of the following are true about OpenTelemetry? (Select all that apply.)

   • AOpenTelemetry only supports traces, not metrics or logs.
   • BOpenTelemetry is a backend for storing and visualizing telemetry data.
   • COpenTelemetry provides APIs and SDKs for multiple programming languages.
   • DOpenTelemetry can export telemetry data to multiple backends, such as Prometheus and Jaeger.
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2. 22foundation · easy

   What is the primary role of Grafana in an observability stack?

   • AScraping metrics from application endpoints
   • BStoring time-series data in a database
   • CCreating dashboards to visualize metrics and other data sources
   • DGenerating alerts based on metric thresholds
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4. 23application · medium

   A platform team manages a microservices application deployed on Kubernetes. They currently monitor CPU, memory, and disk usage per pod and have dashboards that alert when these metrics cross thresholds. After a recent incident, they struggled to understand why a user-facing service returned errors even though all pod metrics were normal. The team wants to improve their ability to answer 'why' questions about system behavior. Which approach best addresses this need?

   • AIncrease the retention period for Prometheus metrics to one year.
   • BReplace Prometheus with a commercial APM tool that automatically instruments all services.
   • CAdd more granular CPU and memory alerts for each container.
   • DInstrument the services to emit structured logs and distributed traces, and use them alongside existing metrics.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which log format is structured as key-value pairs and is commonly used in cloud native applications because it is easy for machines to parse?

   • ACSV
   • BPlain text
   • CJSON
   • DXML
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6. 25foundation · easy

   Which statement best defines observability in the context of cloud native applications?

   • AThe practice of collecting and storing all application logs in a central repository for compliance purposes
   • BThe use of dashboards to visualize system performance in real time
   • CThe process of automatically restarting failed containers to maintain service availability
   • DThe ability to infer a system's internal state from its external outputs, such as logs, metrics, and traces
   Reveal Solution Discussion Select an answer first