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Linux Foundation Certified Kubernetes Administrator (CKA) Program Exam Sample Questions (Q34-Q39):

NEW QUESTION # 34
You are deploying a microservices application on Kubernetes where each service has its own dedicated namespace. You want to implement a robust network security policy that allows communication between specific services only. How can you achieve this using NetworkPolicies?

Answer:

Explanation:
See the solution below with Step by Step Explanation.
Explanation:
Solution (Step by Step) :
1. Define Network Policies for Each Service:
- For each service, create a NetworkPolicy that defines the allowed ingress and egress traffic.
- Example for service "service-A":

2. Apply Network Policies: - Apply the NetworkPolicies to the respective namespaces using 'kubectl apply -f networkpolicy.yaml'

NEW QUESTION # 35
Update the deployment with the image version 1.17.4 and verify

A. kubectl set image deploy/webapp nginx=nginx:1.17.4
//Verify
kubectl describe deploy webapp | grep Image
kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]}
{.metadata.name}{" "}{.spec.template.spec.containers[*].i
mage}{" "}'
B. kubectl set image deploy/webapp nginx=nginx:1.17.4
//Verify
kubectl describe deploy webapp | grep Image
kubectl get deploy -
{.metadata.name}{" "}{.spec.template.spec.containers[*].i
mage}{" "}'

Answer: A

NEW QUESTION # 36
Allow traffic from all the pods in "web" namespace and from pods
with label "type=monitoring" to the pods matching label "app: db"

A. kubectl create namespace web
kubectl label namespace/web app=web
vim web-allow-all-ns-monitoring.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: web-allow-all-ns-monitoring
namespace: default
spec:
podSelector:
matchLabels:
app: db
ingress:
- from:
- namespaceSelector:
matchLabels:
app: web
podSelector:
matchLabels:
type: monitoring
k kubectl apply -f web-allow-all-ns-monitoring.yaml
B. kubectl create namespace web
kubectl label namespace/web app=web
vim web-allow-all-ns-monitoring.yaml
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: web-allow-all-ns-monitoring
namespace: default
spec:
podSelector:
podSelector:
matchLabels:
type: monitoring
k kubectl apply -f web-allow-all-ns-monitoring.yaml

Answer: A

NEW QUESTION # 37
Score: 4%

Task
Create a pod named kucc8 with a single app container for each of the following images running inside (there may be between 1 and 4 images specified): nginx + redis + memcached .

Answer:

Explanation:
Solution:
kubectl run kucc8 --image=nginx --dry-run -o yaml > kucc8.yaml
# vi kucc8.yaml
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
name: kucc8
spec:
containers:
- image: nginx
name: nginx
- image: redis
name: redis
- image: memcached
name: memcached
- image: consul
name: consul
#
kubectl create -f kucc8.yaml
#12.07

NEW QUESTION # 38
Deployment
a. Create a deployment of webapp with image nginx:1.17.1 with
container port 80 and verify the image version

A. // Create initial YAML file with -dry-run option
kubectl create deploy webapp --image=nginx:1.17.1 --dryrun=client -o yaml > webapp.yaml vim webapp.yaml apiVersion: apps/v1 kind: Deployment metadata:
labels:
app: webapp
name: webapp
spec: replicas: 1 containers: - image: nginx:1.17.1 name: nginx kubectl create -f webapp.yaml -record=true //Verify Image Version kubectl describe deploy webapp | grep -i "Image" Using JsonPath kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]} {.metadata.name}{" "}{.spec.template.spec.containers[*].i mage}{" "}'
B. // Create initial YAML file with -dry-run option
kubectl create deploy webapp --image=nginx:1.17.1 --dryrun=client -o yaml > webapp.yaml vim webapp.yaml apiVersion: apps/v1 kind: Deployment metadata:
labels:
app: webapp
name: webapp
spec: replicas: 1 selector: matchLabels: app: webapp template: metadata: labels: app: webapp spec: containers: - image: nginx:1.17.1 name: nginx kubectl create -f webapp.yaml -record=true //Verify Image Version kubectl describe deploy webapp | grep -i "Image" Using JsonPath kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]} {.metadata.name}{" "}{.spec.template.spec.containers[*].i mage}{" "}'

Answer: B

NEW QUESTION # 39
......

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