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  The Linux Foundation CKAD certification exam is recognized globally as a standard of excellence in Kubernetes application development. The certification demonstrates that a developer has the knowledge and skills to design, deploy, and manage Kubernetes-based applications. CKAD certification is highly valued by employers who are looking for developers with the skills to work with Kubernetes and to build and deploy cloud-native applications.

  The Linux Foundation CKAD (Linux Foundation Certified Kubernetes Application Developer) Certification Exam is a popular certification program designed for developers who wish to validate their skills in developing and deploying applications on Kubernetes clusters. Kubernetes is a powerful and widely-used open-source platform for container orchestration, and it is increasingly being adopted by organizations to manage their containerized applications. The CKAD certification exam is one of the most sought-after certifications in the industry, and it is recognized by leading companies around the world.

  The Linux Foundation Certified Kubernetes Application Developer (CKAD) exam is a certification program that is designed to test the skills and knowledge of developers who work with Kubernetes. It is an online, performance-based exam that evaluates a candidate’s ability to design and build containerized applications that run on Kubernetes. The exam is designed to be challenging, but it is also an excellent way for developers to showcase their skills and knowledge in the Kubernetes ecosystem.

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  CKAD Exam Questions - CKAD Guide Torrent & CKAD Test Torrent

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  Linux Foundation Certified Kubernetes Application Developer Exam Sample Questions (Q28-Q33):

  NEW QUESTION # 28
  
  Context
  A user has reported an aopticauon is unteachable due to a failing livenessProbe .
  Task
  Perform the following tasks:
  * Find the broken pod and store its name and namespace to /opt/KDOB00401/broken.txt in the format:
  
  The output file has already been created
  * Store the associated error events to a file /opt/KDOB00401/error.txt, The output file has already been created. You will need to use the -o wide output specifier with your command
  * Fix the issue.
  

  Answer:

  Explanation:
  See the solution below.
  Explanation
  Solution:
  Create the Pod:
  kubectl create
  -f http://k8s.io/docs/tasks/configure-pod-container/
  exec-liveness.yaml
  Within 30 seconds, view the Pod events:
  kubectl describe pod liveness-exec
  The output indicates that no liveness probes have failed yet:
  FirstSeen LastSeen Count From SubobjectPath Type Reason Message
  --------- -------- ----- ---- ------------- -------- ------ -------
  24s 24s 1 {default-scheduler } Normal Scheduled Successfully assigned liveness-exec to worker0
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Pulling pulling image
  "gcr.io/google_containers/busybox"
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Pulled Successfully pulled image
  "gcr.io/google_containers/busybox"
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Created Created container with docker id
  86849c15382e; Security:[seccomp=unconfined]
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Started Started container with docker id
  86849c15382e
  After 35 seconds, view the Pod events again:
  kubectl describe pod liveness-exec
  At the bottom of the output, there are messages indicating that the liveness probes have failed, and the containers have been killed and recreated.
  FirstSeen LastSeen Count From SubobjectPath Type Reason Message
  --------- -------- ----- ---- -------------
  37s 37s 1 {default-scheduler } Normal Scheduled Successfully assigned liveness-exec to worker0
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Pulling pulling image
  "gcr.io/google_containers/busybox"
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Pulled Successfully pulled image
  "gcr.io/google_containers/busybox"
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Created Created container with docker id
  86849c15382e; Security:[seccomp=unconfined]
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Started Started container with docker id
  86849c15382e
  2s 2s 1 {kubelet worker0} spec.containers{liveness} Warning Unhealthy Liveness probe failed: cat: can't open
  '/tmp/healthy': No such file or directory
  Wait another 30 seconds, and verify that the Container has been restarted:
  kubectl get pod liveness-exec
  The output shows that RESTARTS has been incremented:
  NAME READY STATUS RESTARTS AGE
  liveness-exec 1/1 Running 1 m

  
  

  NEW QUESTION # 29
  Exhibit:
  
  Task
  A deployment is falling on the cluster due to an incorrect image being specified. Locate the deployment, and fix the problem.

  • A. Pending

  Answer: A

  
  

  NEW QUESTION # 30
  
  Context
  A pod is running on the cluster but it is not responding.
  Task
  The desired behavior is to have Kubemetes restart the pod when an endpoint returns an HTTP 500 on the
  /healthz endpoint. The service, probe-pod, should never send traffic to the pod while it is failing. Please complete the following:
  * The application has an endpoint, /started, that will indicate if it can accept traffic by returning an HTTP 200.
  If the endpoint returns an HTTP 500, the application has not yet finished initialization.
  * The application has another endpoint /healthz that will indicate if the application is still working as expected by returning an HTTP 200. If the endpoint returns an HTTP 500 the application is no longer responsive.
  * Configure the probe-pod pod provided to use these endpoints
  * The probes should use port 8080

  Answer:

  Explanation:
  See the solution below.
  Explanation
  Solution:
  apiVersion: v1
  kind: Pod
  metadata:
  labels:
  test: liveness
  name: liveness-exec
  spec:
  containers:
  - name: liveness
  image: k8s.gcr.io/busybox
  args:
  - /bin/sh
  - -c
  - touch /tmp/healthy; sleep 30; rm -rf /tmp/healthy; sleep 600
  livenessProbe:
  exec:
  command:
  - cat
  - /tmp/healthy
  initialDelaySeconds: 5
  periodSeconds: 5
  In the configuration file, you can see that the Pod has a single Container. The periodSeconds field specifies that the kubelet should perform a liveness probe every 5 seconds. The initialDelaySeconds field tells the kubelet that it should wait 5 seconds before performing the first probe. To perform a probe, the kubelet executes the command cat /tmp/healthy in the target container. If the command succeeds, it returns 0, and the kubelet considers the container to be alive and healthy. If the command returns a non-zero value, the kubelet kills the container and restarts it.
  When the container starts, it executes this command:
  /bin/sh -c "touch /tmp/healthy; sleep 30; rm -rf /tmp/healthy; sleep 600" For the first 30 seconds of the container's life, there is a /tmp/healthy file. So during the first 30 seconds, the command cat /tmp/healthy returns a success code. After 30 seconds, cat /tmp/healthy returns a failure code.
  Create the Pod:
  kubectl apply -f https://k8s.io/examples/pods/probe/exec-liveness.yaml
  Within 30 seconds, view the Pod events:
  kubectl describe pod liveness-exec
  The output indicates that no liveness probes have failed yet:
  FirstSeen LastSeen Count From SubobjectPath Type Reason Message
  --------- -------- ----- ---- ------------- -------- ------ -------
  24s 24s 1 {default-scheduler } Normal Scheduled Successfully assigned liveness-exec to worker0
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Pulling pulling image "k8s.gcr.io/busybox"
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Pulled Successfully pulled image
  "k8s.gcr.io/busybox"
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Created Created container with docker id
  86849c15382e; Security:[seccomp=unconfined]
  23s 23s 1 {kubelet worker0} spec.containers{liveness} Normal Started Started container with docker id
  86849c15382e
  After 35 seconds, view the Pod events again:
  kubectl describe pod liveness-exec
  At the bottom of the output, there are messages indicating that the liveness probes have failed, and the containers have been killed and recreated.
  FirstSeen LastSeen Count From SubobjectPath Type Reason Message
  --------- -------- ----- ---- ------------- -------- ------ -------
  37s 37s 1 {default-scheduler } Normal Scheduled Successfully assigned liveness-exec to worker0
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Pulling pulling image "k8s.gcr.io/busybox"
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Pulled Successfully pulled image
  "k8s.gcr.io/busybox"
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Created Created container with docker id
  86849c15382e; Security:[seccomp=unconfined]
  36s 36s 1 {kubelet worker0} spec.containers{liveness} Normal Started Started container with docker id
  86849c15382e
  2s 2s 1 {kubelet worker0} spec.containers{liveness} Warning Unhealthy Liveness probe failed: cat: can't open
  '/tmp/healthy': No such file or directory
  Wait another 30 seconds, and verify that the container has been restarted:
  kubectl get pod liveness-exec
  The output shows that RESTARTS has been incremented:
  NAME READY STATUS RESTARTS AGE
  liveness-exec 1/1 Running 1 1m

  
  

  NEW QUESTION # 31
  
  Context
  You are tasked to create a ConfigMap and consume the ConfigMap in a pod using a volume mount.
  Task
  Please complete the following:
  * Create a ConfigMap named another-config containing the key/value pair: key4/value3
  * start a pod named nginx-configmap containing a single container using the nginx image, and mount the key you just created into the pod under directory /also/a/path See the solution below.

  Answer:

  Explanation:
  Explanation
  Solution:
  
  
  
  
  
  

  
  

  NEW QUESTION # 32
  Refer to Exhibit.
  
  Task:
  Update the Deployment app-1 in the frontend namespace to use the existing ServiceAccount app.

  Answer:

  Explanation:
  Solution:
  

  
  

  NEW QUESTION # 33
  ......

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