KCNA practice questions 11–20

1. Question 11 · 282 in bank

   What is a best practice to minimize the container image size?

   • AUse a DockerFile.
   • BUse multistage builds.
   • CBuild images with different tags.
   • DAdd a build.sh script.

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   Answer: B

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2. Question 12 · 282 in bank

   How long should a stable API element in Kubernetes be supported (at minimum) after deprecation?

   • A9 months
   • B24 months
   • C12 months
   • D6 months

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   Answer: C

   References

   • Kubernetes documentation

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3. Question 13 · 282 in bank

   Which tools enable Kubernetes HorizontalPodAutoscalers to use custom, application-generated metrics to trigger scaling events?

   • APrometheus and the prometheus-adapter.
   • BGraylog and graylog-autoscaler metrics.
   • CGraylog and the kubernetes-adapter.
   • DGrafana and Prometheus.

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   Answer: A

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4. Question 14 · 282 in bank

   Which of the following is a valid PromQL query?

   • ASELECT * from http_requests_total WHERE job=apiserver
   • Bhttp_requests_total WHERE (job="apiserver")
   • CSELECT * from http_requests_total
   • Dhttp_requests_total(job="apiserver")

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   Answer: D

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5. Question 15 · 282 in bank

   Which of the following best describes horizontally scaling an application deployment?

   • AThe act of adding/removing node instances to the cluster to meet demand.
   • BThe act of adding/removing applications to meet demand.
   • CThe act of adding/removing application instances of the same application to meet demand.
   • DThe act of adding/removing resources to application instances to meet demand.

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   Answer: C

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6. Question 16 · 282 in bank

   How many different Kubernetes service types can you define?

   • A2
   • B3
   • C4
   • D5

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   Answer: C

   Explanation

   The correct answer is: C. 4 Explanation: Kubernetes supports four different service types: ClusterIP: The default service type, which exposes the service on a cluster-internal IP. It is accessible only within the cluster. NodePort: Exposes the service on each node's IP at a static port. This makes the service accessible outside the cluster via : . LoadBalancer: Exposes the service externally using a cloud provider's load balancer. This service type automatically provisions a load balancer for the service. ExternalName: Maps the service to a DNS name by returning a CNAME record, redirecting traffic to an external service outside the Kubernetes cluster. These are the four primary service types in Kubernetes.

   Source: Adapted from community discussion — miskill

   References

   • Kubernetes documentation

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7. Question 17 · 282 in bank

   What is the difference between a Deployment and a ReplicaSet?

   • AWith a Deployment, you can’t control the number of pod replicas.
   • BA ReplicaSet does not guarantee a stable set of replica pods running.
   • CA Deployment is basically the same as a ReplicaSet with annotations.
   • DA Deployment is a higher-level concept that manages ReplicaSets.

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   Answer: D

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8. Question 18 · 282 in bank

   The Container Runtime Interface (CRI) defines the protocol for the communication between:

   • AThe kubelet and the container runtime.
   • BThe container runtime and etcd.
   • CThe kube-apiserver and the kubelet.
   • DThe container runtime and the image registry.

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   Answer: A

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9. Question 19 · 282 in bank

   Which authorization-mode allows granular control over the operations that different entities can perform on different objects in a Kubernetes cluster?

   • AWebhook Mode Authorization Control
   • BRole Based Access Control
   • CNode Authorization Access Control
   • DAttribute Based Access Control

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   Answer: B

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10. Question 20 · 282 in bank

    Which of the following is a correct definition of a Helm chart?

    • AA Helm chart is a collection of YAML files bundled in a tar.gz file and can be applied without decompressing it.
    • BA Helm chart is a collection of JSON files and contains all the resource definitions to run an application on Kubernetes.
    • CA Helm chart is a collection of YAML files that can be applied on Kubernetes by using the kubectl tool.
    • DA Helm chart is similar to a package and contains all the resource definitions to run an application on Kubernetes.

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    Answer: D

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KCNA practice, question 11. 282 questions available.