KCNA 無料問題集「Linux Foundation Kubernetes and Cloud Native Associate」

（A）A DaemonSet ensures that there are as many pods running as specified in the replicas field.

（B）A DaemonSet ensures that a process (agent) runs on every node.

（C）A DaemonSet ensures that the kubelet is constantly up and running.

（D）A DaemonSet ensures that all (or certain) nodes run a copy of a Pod.

（A）kata-runtime

（B）containerd

（C）CRI-O

（D）LXD

（A）3

（B）5

（C）4

（D）2

（A）etcd stores the containers running in the cluster for disaster recovery.

（B）etcd stores all cluster data in a key value store.

（C）etcd stores copies of the Kubernetes config files that live /etc/.

（D）etcd stores the YAML definitions for all the cluster components.

（A）It's used for automatically assigning IP addresses to devices connected to the network.

（B）It's a protocol that turns human-readable domain names into IP addresses on the Internet.

（C）It's a procedure for discovering a MAC address, associated with a given IP address.

（D）It's a mechanism for applications and microservices to locate each other on a network.

（A）runsc, kata

（B）crun, cri-o

（C）docker, containerd

（D）rune, cgroups

（A）k1s

（B）OpenShift

（C）RKE

（D）k3s

（A）To centrally manage and apply runtime configuration values for application components.

（B）To provide a stable endpoint for accessing Pods even when their IP addresses change.

（C）To automatically adjust the number of Pods based on CPU or memory utilization metrics.

（D）To define and attach persistent volumes that store application data across Pod restarts.

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

（B）Leverage the Kubernetes Cluster Autoscaler to automatically start and stop nodes as they're needed.

（C）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.

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

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

（B）CronJob controller component creates a Pod and waits until it finishes to run.

（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.

（A）Filtering and selecting

（B）Filtering and scoring

（C）Grouping and placing

（D）Scoring and creating

（A）Selector

（B）Job

（C）Controller

（D）Service

（A）Managing static Pods directly through the API server.

（B）Creating Pods through workload resources like Deployments.

（C）Renaming containers in a Pod using kubectl patch.

（D）Guaranteeing Pods always stay on the same node once scheduled.

（A）On start

（B）On failure

（C）On update

（D）On login