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[General] Real Linux Foundation CKS Dumps PDF Format

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【General】 Real Linux Foundation CKS Dumps PDF Format

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The Linux Foundation CKS Exam covers various aspects of Kubernetes security, including access control, network security, cluster hardening, authentication and authorization, and monitoring and logging. Candidates are required to demonstrate their knowledge of these topics through a series of practical, scenario-based questions that test their ability to analyze and solve security problems in real-world situations.
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Linux Foundation CKS Certification is a valuable credential for IT professionals who want to demonstrate their expertise in securing Kubernetes environments. Certified Kubernetes security specialists are in high demand, and the CKS certification can help individuals advance their careers and increase their earning potential. Certified Kubernetes Security Specialist (CKS) certification also provides organizations with assurance that their Kubernetes environments are being managed and secured by qualified professionals.
Linux Foundation Certified Kubernetes Security Specialist (CKS) Sample Questions (Q47-Q52):NEW QUESTION # 47
Imagine a scenario where you nave multiple Kubernetes clusters. You want to establish a secure supply chain by allowing only images from a centralized image registry to be deployed across all clusters. Explain how you can achieve this.
Answer:
Explanation:
Solution (Step by Step) :
1. Centralized Image Registry:
- Set up a centralized image registry that will serve as the single source of truth for all container images-
- Some popular choices include:
- Docker Hub: A public registry with a free tier for personal and open-source projects.
- Harbor: An open-source registry with features like vulnerability scanning and access control.
- Google Container Registry (GCR): A registry integrated with Google Cloud Platform, offering features like image signing and storage management.
2. Configure Cluster Access:
- Ensure all your Kubernetes clusters have access to this centralized image registry.
- For private registries, configure authentication and authorization mechanisms to control which clusters have access to which images.
3. Implement Image Pull Policies:
- On each cluster, set the 'imagePullPolicy' to 'Always' for deployments using images from the centralized registry. This ensures that every pod pulls
the image directly from the registry, avoiding reliance on cached images.
- Example (for a deployment using 'nginx:latest' from a private registry):

4. Enable Image Signing (Optional): - Implement image signing to further enhance security - Sign images in the centralized registry using a trusted key - Configure Kubernetes clusters to only allow images signed with the trusted key to be deployed. 5. Monitoring and Auditing: - Implement robust monitoring and auditing to track image pulls, deployments, and any potential vulnerabilities. 6. Consider a Software Supply Chain Management (SSCM) Tool: - Use a dedicated SSCM tool to manage the entire image lifecycle, including vulnerability scanning, policy enforcement, and access control. Tools like JFrog Xray or Aqua Security can help automate this process.

NEW QUESTION # 48
A container image scanner is set up on the cluster.
Given an incomplete configuration in the directory
/etc/Kubernetes/confcontrol and a functional container image scanner with HTTPS endpoint https://acme.local.8081/image_policy
  • A. 1. Enable the admission plugin.
Answer: A
Explanation:
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as the latest.

NEW QUESTION # 49
You're designing a security policy for your Kubernetes cluster to restrict container image sources. You want to allow only images from your private registry and a few trusted public registries. How would you implement this policy using Admission Webhooks and what kind of validation logic would you implement in the webhook?
Answer:
Explanation:
Solution (Step by Step) :
1. Create Admission Webhook:
- Define a Kubernetes Admission Webhook that will intercept requests to create or modify pods.
- You'll need to create a webhook configuration and a service that will handle the validation logic-
- Example webhook configuration:

2. Implement Validation Logic (Service): - Create a service that will handle the webhook requests. This service should contain your validation logic. - The validation logic should check the container images used in the pod definitions. - Sample validation logic (Python using Flask, but you could use any language/framework): python from flask import Flask, request, jsonity import json

3. Deploy Service and Webhook: - Deploy your service and the webhook configuration. - Ensure that your service is accessible by the Kubernetes API server. 4. Test: - Create or update a pod with a container image from an allowed source. The webhook should allow it. - Create a pod with a container image from a disallowed source. The webhook should deny it.

NEW QUESTION # 50
SIMULATION
Create a RuntimeClass named gvisor-rc using the prepared runtime handler named runsc.
Create a Pods of image Nginx in the Namespace server to run on the gVisor runtime class
Answer:
Explanation:
SeetheExplanationbelowExplanation:
Install the Runtime Class for gVisor
{ # Step 1: Install a RuntimeClass
cat <<EOF | kubectl apply -f -
apiVersion: node.k8s.io/v1beta1
kind: RuntimeClass
metadata:
name: gvisor
handler: runsc
EOF
}
Create a Pod with the gVisor Runtime Class
{ # Step 2: Create a pod
cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
name: nginx-gvisor
spec:
runtimeClassName: gvisor
containers:
- name: nginx
image: nginx
EOF
}
Verify that the Pod is running
{ # Step 3: Get the pod
kubectl get pod nginx-gvisor -o wide
}

NEW QUESTION # 51
SIMULATION
Documentation
Deployment, Pod Security Admission, Pod Security Standards
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000036
Context
For compliance, all user namespaces enforce the restricted Pod Security Standard .
Task
The confidential namespace contains a Deployment that is not compliant with the restricted Pod Security Standard . Thus, its Pods can not be scheduled.
Modify the Deployment to be compliant and verify that the Pods are running.
The Deployment's manifest file can be found at /home/candidate/nginx-unprivileged.yaml.
Answer:
Explanation:
See the Explanation below for complete solution
Explanation:
1) Connect to the correct host
ssh cks000036
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) Confirm the failing Pods + see the PSA error (fast)
kubectl -n confidential get deploy
kubectl -n confidential get pods
kubectl -n confidential describe deploy <deployment-name> | sed -n '/Events/,$p' (You'll usually see "violates PodSecurity 'restricted' ..." with the exact missing fields.)
3) Edit the provided manifest
vi /home/candidate/nginx-unprivileged.yaml
You must ensure the Pod template becomes compliant. Add/ensure the following exact blocks:
4) Add Pod-level securityContext (under spec.template.spec)
Find:
spec:
template:
spec:
Add this block under it (or merge if securityContext: already exists):
securityContext:
runAsNonRoot: true
runAsUser: 65535
seccompProfile:
type: RuntimeDefault
5) Add Container-level securityContext (under the nginx container)
Find:
containers:
- name: ...
image: ...
Under that container, add (or adjust) this exact block:
securityContext:
allowPrivilegeEscalation: false
readOnlyRootFilesystem: true
capabilities:
drop:
- ALL
If there are multiple containers, apply the same container securityContext to each one.
Save and exit:
:wq
6) Apply the manifest to the confidential namespace
kubectl -n confidential apply -f /home/candidate/nginx-unprivileged.yaml Wait rollout:
kubectl -n confidential rollout status deployment/<deployment-name>
If you don't know the deployment name from the file, list:
kubectl -n confidential get deploy
7) Verify Pods are running
kubectl -n confidential get pods -o wide
If still failing, show the exact PSA violation (this tells you what else to fix):
kubectl -n confidential describe pod <pod-name> | sed -n '/Events/,$p'
Quick "if it still fails" fixes (common restricted blockers)
Open the manifest again and ensure these are NOT set (or are removed/false):
hostNetwork: true
hostPID: true
hostIPC: true
any hostPort:
privileged: true
capabilities.add:
seccompProfile: Unconfined
runAsUser: 0 or runAsNonRoot: false
Then re-apply.
Minimal compliant result (what the grader expects)
Your Pod template should include:
seccompProfile: RuntimeDefault
runAsNonRoot: true (and a non-root UID like 65535)
container: allowPrivilegeEscalation: false
container: capabilities.drop: [ALL]
container: readOnlyRootFilesystem: true

NEW QUESTION # 52
......
Exam CKS Simulator: https://www.prepawaypdf.com/Linux-Foundation/CKS-practice-exam-dumps.html
P.S. Free 2026 Linux Foundation CKS dumps are available on Google Drive shared by PrepAwayPDF: https://drive.google.com/open?id=1fA5wyQwl9Hte0KpQb932CxiLVRfN3Wk1
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