KCNA Practice Test 4 — 10 Questions

Question 1

A team wants to visualize metrics from Prometheus in a dashboard. Which tool is commonly used for this purpose?

Accepted Answer

Grafana. Grafana is the most popular visualization tool for Prometheus metrics, offering rich dashboards.

Answer

Alertmanager

Answer

Jaeger UI

Answer

Kibana

Question 2

Which TWO are benefits of using a service mesh? (Choose two.)

Accepted Answer

Observability of service-to-service communication. Service mesh provides observability (e.g., metrics, tracing) and traffic management (e.g., routing, retries) between services.

Answer

Automatic database scaling

Answer

Container image building

Answer

Load balancing of external requests

Question 3

Which component of the OpenTelemetry architecture is responsible for receiving data from instrumented applications and processing it before export?

Accepted Answer

OpenTelemetry Collector. The OpenTelemetry Collector receives, processes, and exports telemetry data.

Answer

OpenTelemetry SDK

Answer

OpenTelemetry API

Answer

OpenTelemetry exporter

Question 4

Which TWO of the following tools are commonly used for distributed tracing in cloud-native environments? (Select two.)

Accepted Answer

Zipkin. Jaeger and Zipkin are popular open-source distributed tracing systems.

Answer

Grafana

Answer

Fluentd

Answer

Prometheus

Question 5

Which of the following is the correct definition of a Service Level Indicator (SLI)?

Accepted Answer

A quantitative measure of a specific aspect of the service's reliability. An SLI is a specific metric that measures a particular aspect of service reliability, such as request latency or error rate.

Answer

A formal contract between a service provider and a customer

Answer

A target value or range for a metric, agreed upon with stakeholders

Answer

A tool for aggregating logs from multiple sources

Question 6

Which THREE of the following are important considerations when defining SLOs (Service Level Objectives)? (Select three.)

Accepted Answer

They must be aligned with business impact. SLOs should be based on SLIs, define a target (e.g., 99.9%), and include a measurement window. Cost is not a direct consideration for SLO definition.

Answer

They should include an error budget

Answer

They should minimize infrastructure cost

Question 7

Which CNCF project is primarily focused on providing a unified way to define and manage cloud-native applications using declarative configuration stored in Git?

Accepted Answer

ArgoCD. GitOps uses Git as the single source of truth for declarative infrastructure and application configuration. ArgoCD is a CNCF graduated project that implements GitOps for Kubernetes. Flux is also a GitOps tool but ArgoCD is more widely recognized as the primary GitOps project.

Answer

Helm

Answer

Prometheus

Answer

Envoy

Question 8

In GitOps with ArgoCD, what happens when the desired state in Git differs from the live state in the cluster?

Accepted Answer

ArgoCD syncs the cluster to match Git if auto-sync is enabled. ArgoCD detects drift and can automatically sync the cluster to match Git, enabling self-healing.

Answer

ArgoCD reports an error and stops working

Answer

ArgoCD deletes the Git repository

Answer

ArgoCD automatically reverts the changes in Git

Question 9

What is the primary purpose of a container registry in a CI/CD pipeline?

Accepted Answer

To store and distribute container images. A container registry stores built container images and provides a mechanism to push and pull images. It is a central component in the CI/CD workflow for image distribution.

Answer

To store source code

Answer

To manage Kubernetes secrets

Answer

To run unit tests

Question 10

Which TWO of the following are common log aggregation tools used in Kubernetes environments? (Select two)

Accepted Answer

Fluentd. Fluentd and Fluent Bit are both popular log aggregators and forwarders in Kubernetes. Loki is a log storage system, not an aggregator.

Answer

Loki

Answer

Prometheus

Answer

Jaeger