KCNA Monitoring and Logging 2

Question 1

Which Kubernetes object exposes metrics in Prometheus format for cluster-level resource usage?

Accepted Answer

kube-state-metrics

Answer

kube-state-metrics exposes cluster-level metrics about Kubernetes objects (deployments, pods, nodes) in Prometheus format, distinct from resource usage metrics.

Question 2

What is the default log driver used by Docker (and many container runtimes) when no driver is specified?

Accepted Answer

json-file

Answer

The json-file driver is the default Docker log driver, writing container logs as JSON to files on the host filesystem.

Question 3

In a Kubernetes cluster, where are container logs stored on the node by default?

Accepted Answer

/var/log/pods/

Answer

Kubernetes stores container logs under /var/log/pods/ on each node, organized by namespace, pod name, and container name.

Question 4

Which CNCF project provides a vendor-neutral observability framework for generating, collecting, and exporting telemetry data?

Accepted Answer

OpenTelemetry

Answer

OpenTelemetry (OTel) is the CNCF standard for instrumenting, generating, collecting, and exporting telemetry (metrics, logs, traces) in a vendor-neutral way.

Question 5

What does the `kubectl top nodes` command rely on to return resource usage data?

Accepted Answer

metrics-server

Answer

kubectl top nodes queries the Metrics API, which is typically served by metrics-server aggregating cAdvisor data from each node.

(KCNA) Kubernetes and Cloud Native Associate Practice Test

(KCNA) Kubernetes and Cloud Native Associate Practice Test

KCNA Monitoring and Logging 2