Kubernetes Administrator (CKA) Practice Questions: Second Edition Part 3

Which of the following validates and configures data for the api objects, including pods, services, replication controllers, and others? The API Server handles REST operations and serves as an interface to the cluster’s shared state through which all other components interact.

Which is a network proxy that runs on each node in your cluster, implementing part of the Kubernetes Service concept? It maintains network rules on nodes that allow network communication to your Pods from network sessions inside or outside your cluster.

Docker and Kubernetes network troubleshooting can become complex. With a proper understanding of how Docker and Kubernetes networking works and the right set of tools, you can troubleshoot and resolve these networking issues. Which container has a set of powerful networking troubleshooting tools that can be used to troubleshoot Docker networking issues? Along with these tools come a set of use-cases that show how this container can be used in real-world scenarios.

Which of the following uses Kubernetes resources (DaemonSet, Deployment) to implement cluster features? Because these provide cluster-level features, namespaced resources for addons belong within the kube-system namespace.

Which mechanism is responsible for saving container logs to a central log store with a search/browsing interface?

Which checks and configures data for API objects such as pods, services, and replication controllers?

Check the status of your nodes to see if any of them are experiencing issues. Which is used to see the overall status of each node?

Check the status of your nodes to see if any of them are experiencing issues. Which is used to get more information on any nodes not in the READY state?

In a kubeadm cluster, several K8s components run as pods in the kube-system namespace. Check the status of these components with which commands?

Which logs are an important part of troubleshooting a Kubernetes cluster? Can you check the logs for your Kubernetes-related services on each node using journalctl?

In Kubernetes, which type of logs redirect log output to /var/log?

Which command allows you to see systemd logs, giving you a list of log lines? If the node does not have a systemd, are logs managed in the same way they are in conventional server setups?

Which logs relate to Kubernetes and all of its system component logs, and you can distinguish between components that operate in a container and components that do not?

You can also run commands inside containers. Suppose you need to troubleshoot what is going on inside a container. You can use which command to run inside those containers?

You can see a pod’s status with which two commands to get more information about what may be happening with an unhealthy pod?

In Kubernetes, which can you use to gain insight into what is happening within the container?

Which command is used to view a container’s logs? A container’s log contains everything the standard output (stdout) and error (stderr) streams by the container process?

In addition to checking on your Kubernetes networking plugin, it may be a good idea to look at which you are experiencing issues within the Kubernetes cluster network? In a kubeadm cluster, which runs as Pods in the kube-system namespace?

You can run a container in the cluster that you can use to run commands to test and gather information about network functionality. Which image is a great tool for this? Which image contains a variety of networking exploration and troubleshooting tools?

In Kubernetes, kubectl returns two main sets of metrics, one for pods and one for nodes. You may use which command to see how much CPU and RAM each pod uses?

Containers have ephemeral __________, which means data is stored as long as the container is alive.

Volume retains the data even after the container has crashed or been removed. True or false?

You treat __________ as an abstract resource.

To consume persistentVolume (PV), you need to use __________.

PersistentVolume has access modes such as ReadWriteOnce, ReadWriteMany and ReadOnlyMany. True or false?

Volume is defined in the pod and mounted in the __________ .

Containers can share a single volume, but they must be in different pods. True or false?

hostPath is a type of volume that allows storing data on the specified location on the disk. True or false?

StorageClass has an attribute called __________ that allows expansion or resizing of volume after they are created.

When a user requests a persistentVolume, which API is used to represent the request?

Kubernetes is an open-source platform, but it is not scalable. True or false?

The K8s cluster is a collection of servers called __________.

Containers can communicate with other containers easily. True or false?

Inside a Node, there is a Cluster and a Control Plane. True or false?

Kubernetes cluster is easily built by a tool called __________.