Kubernetes and Cloud Native Associate (KCNA) Free Practice Test

Question 1

What Linux namespace is shared by default by containers running within a Kubernetes Pod?

A. Network

B. Process ID

C. Process Name

D. Host Network

Correct Answer: A

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Question 2

Which of these commands is used to retrieve the documentation and field definitions for a Kubernetes resource?

A. kubectl explain

B. kubectl get --help

C. kubectl api-resources

D. kubectl show

Correct Answer: A

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Question 3

What is the main role of the Kubernetes DNS within a cluster?

A. Allows Pods running in dual stack to convert IPv6 calls into IPv4 calls.

B. Provides a DNS as a Service, allowing users to create zones and registries for domains that they own.

C. Provides consistent DNS names for Pods and Services for workloads that need to communicate with each other.

D. Acts as a DNS server for virtual machines that are running outside the cluster.

Correct Answer: C

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Question 4

What framework does Kubernetes use to authenticate users with JSON Web Tokens?

A. OpenID Container

B. OpenID Connect

C. OpenID CNCF

D. OpenID Cluster

Correct Answer: B

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Question 5

Which cloud native tool keeps Kubernetes clusters in sync with sources of configuration (like Git repositories), and automates updates to configuration when there is new code to deploy?

A. Helm and Kustomize

B. GitOps Toolkit

C. Flux and ArgoCD

D. Linkerd and Istio

Correct Answer: C

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Question 6

What fields must exist in any Kubernetes object (e.g. YAML) file?

A. apiVersion, kind, metadata

B. apiVersion, metadata, namespace

C. kind, namespace, data

D. kind, metadata, data

Correct Answer: A

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Question 7

Services and Pods in Kubernetes are ______ objects.

A. REST

B. JSON

C. Java

D. YAML

Correct Answer: A

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Question 8

Which of the following is a valid PromQL query?

A. SELECT * from http_requests_total WHERE job=apiserver

B. http_requests_total WHERE (job="apiserver")

C. SELECT * from http_requests_total

D. http_requests_total(job="apiserver")

Correct Answer: D

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Question 9

What is the Kubernetes object used for running a recurring workload?

A. Batch

B. CronJob

C. Job

D. DaemonSet

Correct Answer: B

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Question 10

Which of the following scenarios would benefit the most from a service mesh architecture?

A. Thousands of distributed applications running in multiple clusters, each one providing multiple services.

B. Thousands of distributed applications running in a single cluster, each one providing multiple services.

C. A few applications with hundreds of Pod replicas running in multiple clusters, each one providing multiple services.

D. Tens of distributed applications running in multiple clusters, each one providing multiple services.

Correct Answer: A

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Question 11

Which of the following would fall under the responsibilities of an SRE?

A. Writing policy on how to submit a code change.

B. Developing a new application feature.

C. Submitting a budget for running an application in a cloud.

D. Creating a monitoring baseline for an application.

Correct Answer: D

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Question 12

A CronJob is scheduled to run by a user every one hour. What happens in the cluster when it's time for this CronJob to run?

A. CronJob controller component creates a Pod and waits until it finishes to run.

B. Kubelet watches API Server for CronJob objects. When it's time for a Job to run, it runs the Pod directly.

C. CronJob controller component creates a Job. Then the Job controller creates a Pod and waits until it finishes to run.

D. Kube-scheduler watches API Server for CronJob objects, and this is why it's called kube-scheduler.

Correct Answer: C

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Question 13

What does SBOM stand for?

A. System Bill of Materials

B. Security Baseline for Open Source Management

C. Software Bill Operations Management

D. Software Bill of Materials

Correct Answer: D

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Question 14

What is a Pod?

A. A group of one or more containers within Kubernetes.

B. A storage volume within Kubernetes.

C. A single container within Kubernetes.

D. A networked application within Kubernetes.

Correct Answer: A

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Linux Foundation Kubernetes and Cloud Native Associate (KCNA) Free Practice Test