Which command is used to add a worker node to an existing Kubernetes cluster?

kubeadm join : --token --discovery-token-ca-cert-hash

After running kubeadm init, you notice that the kube-scheduler and kube-controller-manager are running as static pods on the control plane node. You need to change the scheduler's leader election lease duration. What is the correct way to make this change?

Use kubectl edit deployment kube-scheduler -n kube-system

Run kubeadm init --config with the scheduler.extraArgs and re-initialize the cluster

Edit the static pod manifest for kube-scheduler in /etc/kubernetes/manifests and add --leader-elect-lease-duration=30s to the command

SSH to the node and run systemctl restart kube-scheduler

Certified Kubernetes Administrator (CKA)

Domain 4Objective 3

Create and Manage Kubernetes Clusters Using Kubeadm CKA Practice Questions (Page 1)

Part of the Cluster Architecture, Installation and Configuration domain, which accounts for 25% of the CKA exam. Linux Foundation does not publish an official question count, but from its 120-minute exam (~50–80 total, ~13–20 in this domain), expect 2–3 from this objective — we provide 26 practice questions to prepare you well beyond it. (estimate)

26questions here

6free pages

10concepts

25%of the exam

Questions 1–5

1foundation · easy
Which command is used to add a worker node to an existing Kubernetes cluster?
Select an answer first
2foundation · easy
Which component is typically placed in front of multiple control plane nodes to distribute API server traffic?
Select an answer first
3application · medium
After running kubeadm init, you notice that the kube-scheduler and kube-controller-manager are running as static pods on the control plane node. You need to change the scheduler's leader election lease duration. What is the correct way to make this change?
Select an answer first
4foundation · easy
Which control plane component is responsible for maintaining the cluster's desired state and watching for changes?
Select an answer first
5foundation · easy
After initializing a cluster with kubeadm, what must be installed to enable pod-to-pod communication?
Select an answer first

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Create and Manage Kubernetes Clusters Using Kubeadm CKA Practice Questions (Page 1)

Questions 1–5

Which command is used to add a worker node to an existing Kubernetes cluster?

Which component is typically placed in front of multiple control plane nodes to distribute API server traffic?

After running kubeadm init, you notice that the kube-scheduler and kube-controller-manager are running as static pods on the control plane node. You need to change the scheduler's leader election lease duration. What is the correct way to make this change?

Which control plane component is responsible for maintaining the cluster's desired state and watching for changes?

After initializing a cluster with kubeadm, what must be installed to enable pod-to-pod communication?

Keep studying — Cluster Architecture, Installation and Configuration