A company has a monitoring system that tracks known failure modes (e.g., high CPU, low disk space) and alerts on them. They want to move towards observability to handle unknown failure modes. Which change best represents this shift?

Instrument the system to emit high-cardinality data such as traces and structured logs, and provide tools to query them.

Use a single dashboard that displays all metrics in one place.

Add more predefined alerts for potential failure modes.

Increase the frequency of metric scraping to every 5 seconds.

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

Collecting and querying distributed traces

Aggregating logs from multiple applications

Visualizing metrics on dashboards

Collecting and storing metrics from monitored targets

How do distributed traces help identify performance bottlenecks in a microservices architecture?

By recording every log message generated during a request

By counting the total number of errors across all services

By aggregating CPU and memory usage of all containers

By showing the time spent in each service or operation for a request, revealing which component is slow

A team is setting up a monitoring stack with Prometheus and Grafana. They want to ensure they can effectively monitor their Kubernetes cluster. Which of the following are appropriate uses of Prometheus and Grafana? (Select all that apply.)

Using Grafana to create dashboards that visualize Prometheus metrics.

Using Grafana to send alerts based on Prometheus metrics.

Using Prometheus to store and query logs.

Using Prometheus to scrape metrics from Kubernetes nodes and pods.

Kubernetes and Cloud Native Associate (KCNA)

Domain 3Objective 3

Observability KCNA Practice Questions (Page 3)

Part of the Cloud Native Application Delivery domain, which accounts for 16% of the KCNA exam. Linux Foundation does not publish an official question count, but from its 90-minute exam (~35–60 total, ~6–10 in this domain), expect 2–3 from this objective — we provide 31 practice questions to prepare you well beyond it. (estimate)

31questions here

7free pages

7concepts

16%of the exam

Questions 11–15

11foundation · easy
Which type of metric is best suited for measuring a value that can only increase, such as the total number of requests processed by a service?
Select an answer first
12expert · hard
A company has a monitoring system that tracks known failure modes (e.g., high CPU, low disk space) and alerts on them. They want to move towards observability to handle unknown failure modes. Which change best represents this shift?
Select an answer first
13foundation · easy
What is the primary role of Prometheus in an observability stack?
Select an answer first
14foundation · easy
How do distributed traces help identify performance bottlenecks in a microservices architecture?
Select an answer first
15application · medium · select all that apply
A team is setting up a monitoring stack with Prometheus and Grafana. They want to ensure they can effectively monitor their Kubernetes cluster. Which of the following are appropriate uses of Prometheus and Grafana? (Select all that apply.)
Select an answer first

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