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Linux Foundation CKA Exam Syllabus Topics:

Section	Weight	Objectives
Storage	10%	- PersistentVolumes and PersistentVolumeClaims - Storage classes
Workloads & Scheduling	15%	- Scheduling constraints - Deployments and rolling updates - ConfigMaps and Secrets
Troubleshooting	30%	- Cluster component troubleshooting - Application and networking debugging
Cluster Architecture, Installation & Configuration	25%	- High availability setup - Cluster installation and configuration - Kubernetes architecture components
Services & Networking	20%	- Network policies - Ingress configuration - Services (ClusterIP, NodePort, LoadBalancer)

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q73-Q78):

NEW QUESTION # 73
Score: 7%

Task
First, create a snapshot of the existing etcd instance running at https://127.0.0.1:2379, saving the snapshot to
/srv/data/etcd-snapshot.db.

Next, restore an existing, previous snapshot located at /var/lib/backup/etcd-snapshot-previo us.db

Answer:

Explanation:
See the solution below.
Explanation
Solution:
#backup
ETCDCTL_API=3 etcdctl --endpoints="https://127.0.0.1:2379" --cacert=/opt/KUIN000601/ca.crt
--cert=/opt/KUIN000601/etcd-client.crt --key=/opt/KUIN000601/etcd-client.key snapshot save
/etc/data/etcd-snapshot.db
#restore
ETCDCTL_API=3 etcdctl --endpoints="https://127.0.0.1:2379" --cacert=/opt/KUIN000601/ca.crt
--cert=/opt/KUIN000601/etcd-client.crt --key=/opt/KUIN000601/etcd-client.key snapshot restore
/var/lib/backup/etcd-snapshot-previoys.db

NEW QUESTION # 74
You have a Kubernetes cluster with a multi-tenant setup where different teams manage their own applications. You need to enforce a policy where only developers from the "engineering" team can create deployments for applications within the "dev" namespace. How would you implement this using RBAC?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
Step 1: Create a Role for the "engineering" team

Step 2: Create a RoleBinding to assign the role to the "engineering" team

- The Role defines the permissions for the "engineering" team, allowing them to create deployments in the "dev" namespace. - The RoleBinding associates the "engineering-role" with the user "john.doe@example.com" (representing a developer from the "engineering" team). Step 3: Validate the setup - A developer from the "engineering" team should be able to create deployments in the "dev" namespace. - Other users or teams without the appropriate permissions should be prevented from creating deployments in the "dev" namespace.

NEW QUESTION # 75
Create a pod with init container which waits for a service called "myservice" to be created. Once init container completes, the myapp-container should start and print a message "The app is running" and sleep for 3600 seconds.

A. vim multi-container-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox:1.28
command: ['sh', '-c', 'echo The app is running! && sleep
3600']
initContainers:
- name: init-myservice
image: busybox:1.28
command: ['sh', '-c', "until nslookup myservice.$(cat
/var/run/secrets/kubernetes.io/serviceaccount/namespace).s
vc.cluster.local; do echo waiting for myservice; sleep 2;
done"]
// Check whether service called "myservice" exists
kubectl get svc
Note: Pod will not start if service called "myservice" doesn't
exist.
// Now, Create the pod
kubectl apply -f multi-container-pod.yaml
B. vim multi-container-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox:1.28
command: ['sh', '-c', 'echo The app is running! && sleep
3600']
initContainers:
- name: init-myservice
done"]
// Check whether service called "myservice" exists
kubectl get svc
Note: Pod will not start if service called "myservice" doesn't
exist.
// Now, Create the pod
kubectl apply -f multi-container-pod.yaml

Answer: A

NEW QUESTION # 76
You have a deployment that runs multiple replicas of a web server application. You need to ensure that the Deployment always maintains at least 2 replicas available, even if one or more pods are deleted or become unavailable. How can you configure the Deployment to achieve this using the 'maxUnavailable' field in the 'strategy.rollingUpdate' section?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define the Deployment with maxUnavailable': Define a Deployment YAML file with 'replicas: 3', indicating that you want three replicas of the web server application. Then, in the 'strategy.rollinglJpdate' section, set the 'maxUnavailable' field to '1'.

2. Apply the Deployment: Apply the YAML file to your cluster using 'kubectl apply -f my-web-server.yamr. The deployment will create three replicas of your web server application. 3. Test the 'maxUnavailable' Configuration: Delete or terminate one of the pods in the Deployment. The Deployment will automatically create a new pod to replace the deleted or unavailable one, ensuring that at least two replicas are always available. You can monitor the status of the deployment using 'kubectl get pods -l app=my-web-server'. You should see that two pods are consistently running, while the third is being replaced.

NEW QUESTION # 77
Perform the following tasks:
* Add an init container tohungry-bear(which has beendefined in spec file
/opt/KUCC00108/pod-spec-KUCC00108.yaml)
* The init container should createan empty file named/workdir/calm.txt
* If/workdir/calm.txtis notdetected, the pod should exit
* Once the spec file has beenupdatedwith the init containerdefinition, the pod should becreated

Answer:

Explanation:
See the solution below.
Explanation
solution

NEW QUESTION # 78
......

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