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Linux Foundation CKA Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Troubleshooting	30%	- Troubleshoot cluster component failure - Understand how to monitor applications - Troubleshoot networking - Manage container stdout & stderr logs - Evaluate cluster and node logging - Troubleshoot application failure
Topic 2: Services & Networking	20%	- Know how to use Ingress controllers and Ingress resources - Understand connectivity between Pods - Use ClusterIP, NodePort, LoadBalancer service types and endpoints - Define and enforce Network Policies - Use the Gateway API to manage Ingress traffic - Understand and use CoreDNS
Topic 3: Cluster Architecture, Installation & Configuration	25%	- Create and manage Kubernetes clusters using kubeadm - Implement and configure a highly-available control plane - Prepare underlying infrastructure for installing a Kubernetes cluster - Understand extension interfaces (CNI, CSI, CRI, etc.) - Manage the lifecycle of Kubernetes clusters - Use Helm and Kustomize to install cluster components - Understand CRDs, install and configure operators - Manage role based access control (RBAC)
Topic 4: Workloads & Scheduling	15%	- Understand Static Pods - Understand DaemonSets - Understand how to run multiple schedulers and configure scheduler policies - Understand how scheduler works - Use label selectors to schedule Pods - Understand Deployments and rolling update/rollback - Understand resource limits and requests - Use ConfigMaps and Secrets to configure applications
Topic 5: Storage	10%	- Understand volume mode, access modes and reclaim policies - Understand persistent volume claims primitive - Understand how to configure applications with persistent storage - Understand Storage Classes and Persistent Volumes

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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q15-Q20):

NEW QUESTION # 15
A bootstrap USB flash drive has been prepared using a Linux workstation to load the initial configuration of a Palo Alto Networks firewall. The USB flash drive was formatted using file system ntfs and the initial configuration is stored in a file named init-cfg.txt.
The contents of Init-cfg.txt in the USB flash drive are as follows:
type=static
ip-address=10.5.107.19
default-gateway=10.5.107.1
netmask=255.255.255.0
Ipv6-address=2001:400:100::1/64
ipv6-default-gateway=2001:400:100::2
hostname=Ca-FW-DC1
panorama-server=10.5.107.20
panorama-server-2=10.5.107.21
tplname=FINANCE TG4
dgname=finance_dg
dns-primary=10.5.6.6
op-command-modes multi-vsys.jumbo-frame
dhcp-send-hostname=no
dhcp-send-client-id=no
dhcp-accept-server-hostname=no
dhcp-accept-server-domain=no
The USB flash drive has been inserted in the firewalls' USB port, and the firewall has been powered on.Upon boot, the firewall fails to begin the bootstrapping process. The failure is caused because:

A. There must be commas between the parameter names and their values instead of the equal symbols
B. nit-cfg bit is an incorrect filename the correct filename should be init-ofg.xml
C. The USB must be formatted using the ext4 file system
D. The bootstrap.xml file is a required file, but it is missing
E. The USB drive has been formatted with an unsupported file system

Answer: C

NEW QUESTION # 16
Create a Pod with main container busybox and which executes this
"while true; do echo 'Hi I am from Main container' >>
/var/log/index.html; sleep 5; done" and with sidecar container
with nginx image which exposes on port 80. Use emptyDir Volume
and mount this volume on path /var/log for busybox and on path
/usr/share/nginx/html for nginx container. Verify both containers
are running.

A. // create an initial yaml file with this
kubectl run multi-cont-pod --image=busbox --restart=Never --
dry-run -o yaml > multi-container.yaml
// edit the yml as below and create it
kubectl create -f multi-container.yaml
vim multi-container.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: multi-cont-pod
name: multi-cont-pod
spec:
volumes:
- name: var-logs
emptyDir: {}
containers:
- image: busybox
command: ["/bin/sh"]
args: ["-c", "while true; do echo 'Hi I am from Main
container' >> /var/log/index.html; sleep 5;done"]
name: main-container
volumeMounts:
- name: var-logs
mountPath: /var/log
- image: nginx
name: sidecar-container
ports:
- containerPort: 80
volumeMounts:
- name: var-logs
mountPath: /usr/share/nginx/html
restartPolicy: Never
// Create Pod
kubectl apply -f multi-container.yaml
//Verify
kubectl get pods
B. // create an initial yaml file with this
kubectl run multi-cont-pod --image=busbox --restart=Never --
dry-run -o yaml > multi-container.yaml
// edit the yml as below and create it
kubectl create -f multi-container.yaml
vim multi-container.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: multi-cont-pod
name: multi-cont-pod
spec:
volumes:
- image: busybox
command: ["/bin/sh"]
args: ["-c", "while true; do echo 'Hi I am from Main
container' >> /var/log/index.html; sleep 5;done"]
name: main-container
volumeMounts:
- name: var-logs
mountPath: /var/log
- image: nginx
name: sidecar-container
ports:
mountPath: /usr/share/nginx/html
restartPolicy: Never
// Create Pod
kubectl apply -f multi-container.yaml
//Verify
kubectl get pods

Answer: A

NEW QUESTION # 17
Set the node named ek8s-node-1 as unavailable and reschedule all the pods running on it.

Answer:

Explanation:
solution

NEW QUESTION # 18
Scale the deployment webserver to 6 pods.

Answer:

Explanation:
solution

NEW QUESTION # 19
You are setting up a persistent volume to host a MySQL database, but you want to ensure data consistency and availability. You have multiple nodes in your Kubernetes cluster. Describe the volume mode, access mode, and reclaim policy you would use for this volume.

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Volume Mode: For a MySQL database, you would use the "Block" volume mode. Block mode allows for direct access to the storage device as a block device, which is ideal for databases that require low-level access and control over storage.
2. Access Mode: To ensure data consistency and availability, you would use the "ReadWriteOnce" access mode. This mode allows only one pod to mount the volume at a time, preventing data corruption.
3. Reclaim Policy: To prevent accidental data deletion, you would use the "Retain" reclaim policy. This policy ensures that the volume is not deleted when the pod is deleted, preserving the database data. Here's an example of a PersistentVolume definition using the specified configurations:

NEW QUESTION # 20
......

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