[2024年最新] 最高のC_KYMD_01試験問題集を使って- 実際の試験問題と解答を解こう
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質問 # 24
Which command lists services in the current namespace?
- A. kubectl show services
- B. kubectl get services
- C. kubectl print services
- D. kubectl list services
正解：B
解説：
Explanation
The command kubectl get services lists all the services in the current namespace1. The get command is used to display one or more resources in Kubernetes2. The services argument specifies the type of resource to list. To list services in a differentnamespace, you can use the --namespace or -n flag3. References: Kubectl commands to list services, deployments and pods from namespace ..., kubectl Cheat Sheet | Kubernetes, How to get the current namespace of current context using kubectl - Stack Overflow
質問 # 25
Which open-source tool does the SAP BTP use to provision SAP BTP, Kyma runtime?
- A. Nomad
- B. Rancher
- C. Gardener
- D. Apache Mesos
正解：C
解説：
Explanation
SAP BTP uses Gardener to provision SAP BTP, Kyma runtime. Gardener is an open-source project that enables the creation and management of Kubernetes clusters across multiple cloud providers and regions.
Gardener automates the deployment, scaling, and maintenance of Kubernetes clusters, as well as the installation of Kyma and other extensions on top of them. Gardener also provides a unified dashboard and API for cluster administration and monitoring. With Gardener, you can choose the cloud provider and region of your choice for your SAP BTP, Kyma runtime cluster, and benefit from the high availability, scalability, and security of Kubernetes and Kyma. References: Kyma Environment | SAP Help Portal, Gardener | SAP BTP, Gardener Project
質問 # 26
Which company initially developed Kubernetes?
- A. Oracle
- B. Microsoft
- C. IBM
- D. Google
正解：D
質問 # 27
You want to run a database migration on SAP BTP, Kyma runtime. Which workload type does SAP recommend you use?
- A. DeemonSet
- B. One off/non parallel job
- C. Parallel job
- D. StatefulSet
正解：D
質問 # 28
In which order are pods created when a StatefulSet is set up?
- A. Consecutive
- B. Chronological
- C. Sequential
正解：C
質問 # 29
What is used to isolate groups of resources in a Kubernetes cluster?
- A. Semantic versioning
- B. Organizations and spaces
- C. Namespaces
- D. Object groups
正解：C
解説：
Explanation
Namespaces are used to isolate groups of resources in a Kubernetes cluster1. Namespaces provide a logical scope for resources, such as pods, services, deployments, and secrets. Namespaces can be used to separate different environments, teams, projects, or applications within the same cluster. Namespaces also enable resource quota management, access control, and service discovery within the cluster2. Namespaces are not the same as organizations and spaces, which are concepts used in Cloud Foundry to manage applications and services3. Semantic versioning is a convention for assigning version numbers to software releases, not a method for isolating resources. Object groups are not a native Kubernetes concept, but a term used in some tools or frameworks to group related resources. References: 1(https://learn.microsoft.com/en-us/azure/aks/operator-best-practices-cluster-isolation), 2(
,
質問 # 30
Which of the following technologies does the Kyme Eventing process use? Note: There are 3 correct Answers to this question.
- A. Jet Stream
- B. MQTT
- C. Apache Kafka
- D. NATS
- E. HTTP-post requests
正解：A、D、E
解説：
Explanation
The Kyma Eventing process uses the following technologies:
HTTP-post requests: HTTP requests are delivered via POST-requests in terms of sending and receiving the events1.
Jet Stream: Jet Stream provides the back end for the Kyma Eventing process1.
NATS: NATS is an open source messaging system that is used for the Kyma Eventing process12.
References: Discovering Kyma Eventing - SAP Learning, In-cluster eventing in SAP BTP, Kyma runtime | SAP Blogs
質問 # 31
What's the responsibility of the Kubernetes cluster master node? Note: There are 2 correct Answers to this question.
- A. Maintain network rules between applications
- B. Schedule workloads
- C. Run deployed applications
- D. Maintain etod
正解：B、D
質問 # 32
When do you use a Daemon Set as the main workload type?
- A. To run multiple instances of the same container
- B. To run a batch job
- C. To run a workload on every node in the cluster
正解：C
解説：
Explanation
A DaemonSet ensures that all (or some) Nodes run a copy of a Pod. As nodes are added to the cluster, Pods are added to them. As nodes are removed from the cluster, those Pods are garbage collected. Deleting a DaemonSet will clean up the Pods it created2.
Some typical uses of a DaemonSet are: running a cluster storage daemon on every node, running a logs collection daemon on every node, running a node monitoring daemon on every node2.
DaemonSets are ideal in a variety of real-world use cases: Running Node monitoring agents, Running log collection agents, Running network plugins, Running service meshes3.
References:
Kubernetes DaemonSet - What It is & How to Use It (Example)
DaemonSet | Kubernetes
Kubernetes Daemonset: A Practical Guide - Spot.io
質問 # 33
Which of the following observability tools are available in SAP BTP, Kyma runtime? Note: There are 2 correct Answers to this question.
- A. Jaeger
- B. Loki
- C. Kiali
- D. Crafana
正解：B、D
質問 # 34
Which open-source project is one part of the API Gateway in Kyma?
- A. Istio
- B. Django
- C. Kodi
- D. OpenCV
正解：A
質問 # 35
A Kubernetes cluster is a set of which of the following?
- A. Data centers
- B. Proxies
- C. Machines
正解：C
質問 # 36
In a Kubernetes cluster, which pattern represents a valid DNS name?
- A. <Namespace> <service-name> svc. Cluster. Local
- B. svc.cluster.local.<service-name>.<namespace>
- C. <service name> <namespace>.svc.cluster.local
- D. svc.cluster.local.<namespace> <service-name>
正解：C
解説：
Explanation
In a Kubernetes cluster, services are assigned a DNS name based on the following pattern: <service-name>.<namespace>.svc.cluster.local. This allows pods to access services within the same namespace or across namespaces using the fully qualified domain name (FQDN). The svc.cluster.local part is the default domain for the cluster, but it can be customized by the cluster administrator. References: Kubernetes Services, DNS for Services and Pods
質問 # 37
Where can you check which SAP BTP services are available to create in your subaccount?
- A. SAP Community
- B. SAP Help Desk
- C. SAP Discovery Center
- D. SAP BTP Service Marketplace
正解：D
質問 # 38
Which kubectl command updates objects?
- A. create - <filename> yam
- B. apply -f <filename>.yaml
- C. kustomize <filename> yaml
正解：B
解説：
Explanation
Use kubectl apply to create or update resources from a file or stdin. This command does a three-way diff between the previous configuration, the input configuration, and the current configuration of the resource, and then applies the changes.
Use kubectl patch to update Kubernetes API objects in place. Do a strategic merge patch or a JSON merge patch.
Use kubectl replace to delete and re-create the resource. You can use this command to update immutable fields of a resource, such as its kind or name.
References:
Manage Kubernetes Objects
Command line tool (kubectl)
kubectl Quick Reference
質問 # 39
Which proxy pattern is used by the service mesh solution in SAP BTP, Kyma runtime?
- A. Per-Node
- B. Shared library
- C. Per-Container
- D. Sidecar
正解：D
解説：
Explanation
The service mesh solution in SAP BTP, Kyma runtime is based on Istio, which is one of the most popular service mesh solutions. Istio uses the Sidecar proxy pattern, which means that a proxy is deployed as a sidecar container next to each service. This way, the proxy can intercept and manage the traffic between the services, without requiring any changes in the application code. The proxy also communicates with the Istio control plane, whichprovides configuration and policies for the service mesh. The other options are not valid proxy patterns for the service mesh solution in SAP BTP, Kyma runtime. References: Discovering the Service Mesh
- SAP Learning, Istio Documentation - What is Istio?
質問 # 40
Which open-source projects provide data visualization in the kyma-system Namespace? Note: There are 2 correct Answers to this question.
- A. Loki
- B. Prometheus Web UI
- C. Vector
- D. Grafana
正解：B、D
質問 # 41
Which command lists the pods in a specific namespace?
- A. kubectl list pods n <namespace>
- B. kubectl print pods n <namespace>
- C. kubectl get pods -n <namespace>
- D. kubectl show pods -n <namespace>
正解：C
質問 # 42
Why would you use observability tools in SAP BTP, Kyma runtime?
- A. To manage StatefulSets
- B. To monitor system behaviour
- C. To run distributed tracing
正解：B
質問 # 43
If an application requires a persistent state between reboots, what must be done before it can be deployed?
- A. Create a new entry in etcd.
- B. Create a Persistent Volume Claim for a pod.
- C. Create a Persistent Volume in the namespace
正解：B
解説：
Explanation
A Persistent Volume Claim (PVC) is a request for storage by a user. It is similar to a Pod, which is a request for compute resources by a user. A PVC enables a Pod to consume a slice of the available storage in the cluster without knowing the details of the underlying storage infrastructure. A PVC is associated with a StorageClass, which defines the type and characteristics of the storage. A PVC is also bound to a Persistent Volume (PV), which is an abstraction of the physical or cloud-based storage resource. A PV is created by the cluster administrator and has a lifecycle independent of any Pod. A PVC can specify the size, access mode, and storage class of the PV it requires. Before deploying an application that needs persistent state, a user must create a PVC for the Pod that will run the application. The PVC will then be automatically bound to a suitable PV by the cluster, or dynamically provisioned if the storage class supports it. The Pod can then mount the PVC as a volumeand access the persistent storage12345. References: Persistent Volumes | Kubernetes, How Kubernetes Persistent Volume Claims Work - CBT Nuggets, Exploring Kubernetes Storage: Persistent Volumes and Persistent Volume Claims - Atatus, Configure a Pod to Use a PersistentVolume for Storage | Kubernetes, kubernetes - How to mount a persistent volume on a Deployment/Pod using PersistentVolumeClaim? - Stack Overflow.
質問 # 44
What are some features of Kubernetes? Note: There are 3 correct Answers to this question.
- A. Automated rollouts and rollbacks
- B. Integration and assessment
- C. Immutability and self-healing
- D. Extensibility and ecosystem
- E. Process management and optimization
正解：A、C、D
解説：
Explanation
Some of the features of Kubernetes are:
Immutability and self-healing: Kubernetes treats pods as immutable, meaning that they are not modified after they are created. Instead, pods are replaced with new ones when they need to be updated or repaired. This ensures that the pods are always in a consistent and predictable state. Kubernetes also monitors the health and availability of the pods and automatically restarts, reschedules, or replicates them if they fail or become unresponsive1.
Extensibility and ecosystem: Kubernetes is designed to be extensible and modular, allowing users to customize and extend its functionality according to their needs. Kubernetes supports various extensions, such as custom resources, operators, admission controllers, schedulers, network plugins, storage plugins, and more. Kubernetes also has a large and vibrant ecosystem of tools, services, and applications that are built on top of or integrate with it2.
Automated rollouts and rollbacks: Kubernetes enables users to deploy and update their applications with zero downtime, using declarative configuration and rolling updates. Kubernetes ensures that only a certain number of pods are changed at a time, and that the new pods are ready before terminating the old ones. Kubernetes also tracks the history of each update and allows users to roll back to a previous version if something goes wrong3.
References:
1: Pods | Kubernetes
2: Extending Kubernetes | Kubernetes
3: Deployments | Kubernetes
質問 # 45
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