Kubernetes and Cloud Native Associate - KCNA Exam Practice Test

Question 1

What function does kube-proxy provide to a cluster?

A. Managing access to the Kubernetes API.

B. Implementing the Ingress resource type for application traffic.

C. Managing data egress from the cluster nodes to the network.

D. Forwarding data to the correct endpoints for Services.

Correct Answer: D

Question 2

What is the difference between a Deployment and a ReplicaSet?

A. A Deployment is a higher-level concept that manages ReplicaSets.

B. With a Deployment, you can't control the number of pod replicas.

C. A Deployment is basically the same as a ReplicaSet with annotations.

D. A ReplicaSet does not guarantee a stable set of replica pods running.

Correct Answer: A

Question 3

What is the main purpose of the Open Container Initiative (OCI)?

A. Improving the security of standards around container formats and runtimes

B. Creating industry standards around container formats and runtimes for private purposes.

C. Creating open industry standards around container formats and runtimes.

D. Accelerating the adoption of containers and Kubernetes in the industry.

Correct Answer: C

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Question 4

What is the purpose of the CRI?

A. To provide runtime integration control when multiple runtimes are used.

B. Support container replication and scaling on nodes.

C. Allow the definition of dynamic resource criteria across containers.

D. Provide an interface allowing Kubernetes to support pluggable container runtimes.

Correct Answer: D

Question 5

How to create a headless service?

A. By specifying .spec.clusterIP: None

B. By specifying .spec.ClusterIP: 0.0.0.0

C. By specifying .spec.ClusterIP: headless

D. By specifying .spec.ClusterIP: localhost

Correct Answer: A

Question 6

What is the correct method to access an internal service by forwarding a local port to a specific port inside a Pod running in a Kubernetes cluster?

A. Load Balancer

B. kubectl port-forward

C. Gateway API

D. NodePort

Correct Answer: B

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Question 7

A Kubernetes deployment must run only on nodes with specific hardware capabilities. What configuration should be used to ensure that Pods are scheduled only on those nodes?

A. Set a PodDisruptionBudget for the deployment.

B. Use a nodeSelector in the deployment specification.

C. Use Pod affinity rules in the deployment configuration.

D. Configure resource limits and requests for the Pods.

Correct Answer: B

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Question 8

Which mechanism can be used to automatically adjust the amount of resources for an application?

A. Kubernetes Event-driven Autoscaling (KEDA)

B. Horizontal Pod Autoscaler (HPA)

C. Cluster Autoscaler

D. Vertical Pod Autoscaler (VPA)

Correct Answer: B

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Question 9

Which storage operator in Kubernetes can help the system to self-scale, self-heal, etc?

A. Container Storage Interface (CSI)

B. Kubernetes

C. Helm

D. Rook

Correct Answer: D

Question 10

In a Kubernetes cluster, which scenario best illustrates the use case for a StatefulSet?

A. A database that requires persistent storage and stable network identities.

B. A service that routes traffic to various microservices in the cluster.

C. A web application that requires multiple replicas for load balancing.

D. A background job that runs periodically and does not maintain state.

Correct Answer: A

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Question 11

Which command provides information about the field replicas within the spec resource of a deployment object?

A. kubectl explain deployment --spec.replicas

B. kubectl describe deployment.spec.replicas

C. kubectl explain deployment.spec.replicas

D. kubectl get deployment.spec.replicas

Correct Answer: C

Question 12

In Kubernetes, what is the general purpose of certificates for cluster components?

A. Certificates are not required for communication between control plane components.

B. To secure communication between control plane components and nodes.

C. To define access policies for Kubernetes users.

D. To schedule Pods on specific nodes based on available resources.

Correct Answer: B

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Question 13

Which Kubernetes component enforces resource consumption limits on containers?

A. etcd

B. kubelet

C. kube-proxy

D. kube-apiserver

Correct Answer: B

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Question 14

Which type of Service requires manual creation of Endpoints?

A. NodePort

B. ClusterIP with selectors

C. Services without selectors

D. LoadBalancer

Correct Answer: C

Question 15

What is an important consideration when choosing a base image for a container in a Kubernetes deployment?

A. It can be any existing image from the public repository without consideration of its contents.

B. It should be the largest available image to ensure all dependencies are included.

C. It should be minimal and purpose-built for the application to reduce attack surface and improve performance.

D. It should always be the latest version to ensure access to the newest features.

Correct Answer: C

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Linux Foundation Kubernetes and Cloud Native Associate - KCNA Exam Practice Test

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