CKA Cluster Maintenance 4

Question 1

Which kubeadm command is run on a worker node during a cluster upgrade (after the control plane is already upgraded)?

Accepted Answer

kubeadm upgrade node

Answer

kubeadm upgrade apply

Answer

kubeadm upgrade worker

Answer

kubeadm join --upgrade

Question 2

What is the purpose of the node-monitor-grace-period setting in kube-controller-manager?

Accepted Answer

How long to wait before marking a node as NotReady after losing heartbeats

Answer

Time to wait before scheduling pods on a new node

Answer

Grace period for node drain operations

Answer

Timeout for kubelet certificate rotation

Question 3

You need to check the etcd cluster health. Which etcdctl command and flag combination is correct?

Accepted Answer

etcdctl endpoint health

Answer

etcdctl cluster-info

Answer

etcdctl member health --all

Answer

etcdctl status --cluster

Question 4

A Kubernetes node shows MemoryPressure=True condition. What does the kubelet do in response?

Accepted Answer

Stops accepting new pods and begins evicting lowest-priority pods

Answer

Shuts down all running pods immediately

Answer

Notifies the API server but takes no action

Answer

Cordons the node automatically

Question 5

Which file on a kubeadm cluster stores the kubeadm configuration used during 'kubeadm init'?

Accepted Answer

A ConfigMap named kubeadm-config in kube-system namespace

Answer

/etc/kubernetes/admin.conf

Answer

/etc/kubeadm/init-config.yaml

Answer

/var/lib/kubelet/config.yaml

Question 6

What is the recommended maximum etcd database size before compaction is required?

Accepted Answer

8GB

Answer

100MB

Answer

2GB

Answer

512MB

Question 7

After restoring etcd from a snapshot, which additional step is required to make etcd operational again?

Accepted Answer

Update the etcd static pod manifest to point to the new data directory and restart kubelet

Answer

Run kubectl apply -f /etc/kubernetes/manifests/etcd.yaml

Answer

Run etcdctl member add to re-register the member

Answer

Re-run kubeadm init to reinitialize the cluster