More KCNA Demo Questions Are Available – KCNA Free Dumps (Part 2, Q41-Q90) of V10.02 Help You Check More About the Materials

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1. What is a key feature of a container network?

Proxying REST requests across a set of containers.

Allowing containers running on separate hosts to communicate.

Allowing containers on the same host to communicate.

Caching remote disk access.

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

apiVersion, kind, metadata

kind, namespace, data

apiVersion, metadata, namespace

kind, metadata, data

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

Developing a new application feature.

Creating a monitoring baseline for an application.

Submitting a budget for running an application in a cloud.

Writing policy on how to submit a code change.

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

Rook

Kubernetes

Helm

Container Storage Interface (CSI)

5. Which Kubernetes component is the smallest deployable unit of computing?

StatefulSet

Deployment

Pod

Container

6. Can a Kubernetes Service expose multiple ports?

No, you can only expose one port per each Service.

Yes, but you must specify an unambiguous name for each port.

Yes, the only requirement is to use different port numbers.

No, because the only port you can expose is port number 443.

7. What Kubernetes control plane component exposes the programmatic interface used to create, manage and interact with the Kubernetes objects?

kube-controller-manager

kube-proxy

kube-apiserver

etcd

8. What function does kube-proxy provide to a cluster?

Implementing the Ingress resource type for application traffic.

Forwarding data to the correct endpoints for Services.

Managing data egress from the cluster nodes to the network.

Managing access to the Kubernetes AP

9. Let’s assume that an organization needs to process large amounts of data in bursts, on a cloud-based Kubernetes cluster. For instance: each Monday morning, they need to run a batch of 1000 compute jobs of 1 hour each, and these jobs must be completed by Monday night.

What’s going to be the most cost-effective method?

Run a group of nodes with the exact required size to complete the batch on time, and use a combination of taints, tolerations, and nodeSelectors to reserve these nodes to the batch jobs.

Leverage the Kubernetes Cluster Autoscaler to automatically start and stop nodes as they’re needed.

Commit to a specific level of spending to get discounted prices (with e.g. “reserved instances” or similar mechanisms).

Use PriorityClasses so that the weekly batch job gets priority over other workloads running on the cluster, and can be completed on time.

10. What methods can you use to scale a Deployment?

With kubectl edit deployment exclusively.

With kubectl scale-up deployment exclusively.

With kubectl scale deployment and kubectl edit deployment.

With kubectl scale deployment exclusively.

11. What is the primary mechanism to identify grouped objects in a Kubernetes cluster?

Custom Resources

Labels

Label Selector

Pod

12. What kubectl command is used to retrieve the resource consumption (CPU and memory) for nodes or Pods?

kubectl cluster-info

kubectl version

kubectl top

kubectl api-resources

13. What are the initial namespaces that Kubernetes starts with?

default, kube-system, kube-public, kube-node-lease

default, system, kube-public

kube-default, kube-system, kube-main, kube-node-lease

kube-default, system, kube-main, kube-primary

14. What component enables end users, different parts of the Kubernetes cluster, and external components to communicate with one another?

kubectl

AWS Management Console

Kubernetes API

Google Cloud SDK

15. Which of the following characteristics is associated with container orchestration?

Application message distribution

Dynamic scheduling

Deploying application JAR files

Virtual machine distribution

16. What is the goal of load balancing?

Automatically measure request performance across instances of an application.

Automatically distribute requests across different versions of an application.

Automatically distribute instances of an application across the cluster.

Automatically distribute requests across instances of an application.

17. Which of the following capabilities are you allowed to add to a container using the Restricted policy?

CHOWN

SYS_CHROOT

SETUID

NET_BIND_SERVICE

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

kubectl explain

kubectl api-resources

kubectl get --help

kubectl show

19. Which statement about Ingress is correct?

Ingress provides a simple way to track network endpoints within a cluster.

Ingress is a Service type like NodePort and ClusterI

Ingress is a construct that allows you to specify how a Pod is allowed to communicate.

Ingress exposes routes from outside the cluster to Services in the cluster.

20. What factors influence the Kubernetes scheduler when it places Pods on nodes?

Pod memory requests, node taints, and Pod affinity.

Pod labels, node labels, and request labels.

Node taints, node level, and Pod priority.

Pod priority, container command, and node labels.

21. What is Helm?

An open source dashboard for Kubernetes.

A package manager for Kubernetes applications.

A custom scheduler for Kubernetes.

An end-to-end testing project for Kubernetes applications.

22. In the Kubernetes platform, which component is responsible for running containers?

etcd

CRI-O

cloud-controller-manager

kube-controller-manager

23. Which Kubernetes feature would you use to guard against split brain scenarios with your distributed application?

Replication controllers

Consensus protocols

Rolling updates

StatefulSet

24. What is the common standard for Service Meshes?

Service Mesh Specification (SMS)

Service Mesh Technology (SMT)

Service Mesh Interface (SMI)

Service Mesh Function (SMF)

25. Why is Cloud-Native Architecture important?

Cloud Native Architecture revolves around containers, microservices and pipelines.

Cloud Native Architecture removes constraints to rapid innovation.

Cloud Native Architecture is modern for application deployment and pipelines.

Cloud Native Architecture is a bleeding edge technology and service.

26. What is the core functionality of GitOps tools like Argo CD and Flux?

They track production changes made by a human in a Git repository and generate a human-readable audit trail.

They replace human operations with an agent that tracks Git commands.

They automatically create pull requests when dependencies are outdated.

They continuously compare the desired state in Git with the actual production state and notify or act upon differences.

27. What is the core metric type in Prometheus used to represent a single numerical value that can go up and down?

Summary

Counter

Histogram

Gauge

28. In which framework do the developers no longer have to deal with capacity, deployments, scaling

and fault tolerance, and OS?

Docker Swarm

Kubernetes

Mesos

Serverless

29. Which of the following systems is NOT compatible with the CRI runtime interface standard? (Typo corrected: “CRI-0” → “CRI-O”)

CRI-O

dockershim

systemd

containerd

30. How does dynamic storage provisioning work?

A user requests dynamically provisioned storage by including an existing StorageClass in their PersistentVolumeClaim.

An administrator creates a StorageClass and includes it in their Pod YAML definition file without creating a PersistentVolumeClaim.

A Pod requests dynamically provisioned storage by including a StorageClass and the Pod name in their PersistentVolumeClaim.

An administrator creates a PersistentVolume and includes the name of the PersistentVolume in their Pod YAML definition file.

31. What is the telemetry component that represents a series of related distributed events that encode the end-to-end request flow through a distributed system?

Metrics

Logs

Spans

Traces

32. What is a Kubernetes service with no cluster IP address called?

Headless Service

Nodeless Service

IPLess Service

Specless Service

33. What is the role of a NetworkPolicy in Kubernetes?

The ability to cryptic and obscure all traffic.

The ability to classify the Pods as isolated and non isolated.

The ability to prevent loopback or incoming host traffic.

The ability to log network security events.

34. What components are common in a service mesh?

Tracing and log storage

Circuit breaking and Pod scheduling

Data plane and runtime plane

Service proxy and control plane

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

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

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

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

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

36. Which of the following are tasks performed by a container orchestration tool?

Schedule, scale, and manage the health of containers.

Create images, scale, and manage the health of containers.

Debug applications, and manage the health of containers.

Store images, scale, and manage the health of containers.

37. What is the name of the Kubernetes resource used to expose an application?

Port

Service

DNS

Deployment

38. Scenario: You have a Kubernetes cluster hosted in a public cloud provider. When trying to create a Service of type LoadBalancer, the external-ip is stuck in the "Pending" state.

Which Kubernetes component is failing in this scenario?

Cloud Controller Manager

Load Balancer Manager

Cloud Architecture Manager

Cloud Load Balancer Manager

39. Which persona is normally responsible for defining, testing, and running an incident management process?

Site Reliability Engineers

Project Managers

Application Developers

Quality Engineers

40. What is the resource type used to package sets of containers for scheduling in a cluster?

Pod

ContainerSet

ReplicaSet

Deployment

41. What feature must a CNI support to control specific traffic flows for workloads running in Kubernetes?

Border Gateway Protocol

IP Address Management

Pod Security Policy

Network Policies

42. How to create a headless Service?

By specifying .spec.clusterIP: headless

By specifying .spec.clusterIP: None

By specifying .spec.clusterIP: 0.0.0.0

By specifying .spec.clusterIP: localhost

43. Kubernetes ___ allows you to automatically manage the number of nodes in your cluster to meet demand.

Node Autoscaler

Cluster Autoscaler

Horizontal Pod Autoscaler

Vertical Pod Autoscaler

44. What Kubernetes component handles network communications inside and outside of a cluster, using operating system packet filtering if available?

kube-proxy

kubelet

etcd

kube-controller-manager

45. What does CNCF stand for?

Cloud Native Community Foundation

Cloud Native Computing Foundation

Cloud Neutral Computing Foundation

Cloud Neutral Community Foundation

46. Which Kubernetes resource workload ensures that all (or some) nodes run a copy of a Pod?

DaemonSet

StatefulSet

kubectl

Deployment

47. Which is the correct kubectl command to display logs in real time?

kubectl logs -p test-container-1

kubectl logs -c test-container-1

kubectl logs -l test-container-1

kubectl logs -f test-container-1

48. Kubernetes supports multiple virtual clusters backed by the same physical cluster. These virtual clusters are called:

Namespaces

Containers

Hypervisors

cgroups

49. Which is an industry-standard container runtime with an “emphasis” on simplicity, robustness, and

portability?

CRI-O

LXD

containerd

kata-runtime

50. What is a probe within Kubernetes?

A monitoring mechanism of the Kubernetes AP

A pre-operational scope issued by the kubectl agent.

A diagnostic performed periodically by the kubelet on a container.

A logging mechanism of the Kubernetes AP

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