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[General] Linux Foundation CKS Certification Exam Questions in 3 User-Friendly Formats

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【General】 Linux Foundation CKS Certification Exam Questions in 3 User-Friendly Formats

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Linux Foundation Certified Kubernetes Security Specialist (CKS) Sample Questions (Q38-Q43):NEW QUESTION # 38
You are running a microservices application on Kubernetes where each service is deployed as a separate Deployment. You want to implement multi-tenancy to ensure that different tenants nave their own isolated environments. How would you implement this multi-tenancy strategy, and what are some of the potential challenges?
Answer:
Explanation:
Solution (Step by Step) :
1. Namespaces: Use Kubernetes namespaces to isolate tenants. Each tenant will have their own namespace, which will contain their deployments, services, and other resources.
- Example: You could create namespaces for "tenant-a", "tenant-b", "tenant-c", etc.
2. RBAC (Role-Based Access Control): Implement RBAC to control access to resources within each namespace.
- Example: Define roles for each tenant, granting them access to the resources they need in their namespace. For instance, a "tenant-a-admin" role could have full control over resources in "tenant-a" namespace.
3. Network Policies: Define network policies to control communication between pods in different namespaces.
- Example: Create network policies to allow communication between services within the same tenant's namespace but restrict communication between services in different tenant namespaces.
4. Service Accounts: Use separate service accounts for each tenant to isolate their access to resources.
5. Persistent Volumes: Create separate persistent volumes for each tenant to ensure that their data is isolated.
6. ConfigMaps and Secrets: Store tenant-specific configuration data in separate ConfigMaps and Secrets.
7. Resource Quotas: Set resource quotas for each tenant to limit the resources they can consume.
8. Challenges of Multi-Tenancy:
- Complexity: Implementing multi-tenancy can add complexity to your Kubernetes configuration and deployment process.
- Performance: Isolating tenants can potentially impact performance, as network communication may be restricted.
- Resource Allocation: You need to carefully manage resource allocation to ensure that each tenant gets the resources they need.
- Security: You need to carefully secure your multi-tenant environment to prevent one tenant from compromising another.

NEW QUESTION # 39
Enable audit logs in the cluster, To Do so, enable the log backend, and ensure that
1. logs are stored at /var/log/kubernetes/kubernetes-logs.txt.
2. Log files are retained for 5 days.
3. at maximum, a number of 10 old audit logs files are retained.
Edit and extend the basic policy to log:
  • A. 1. Cronjobs changes at RequestResponse
Answer: A
Explanation:
2. Log the request body of deployments changes in the namespace kube-system.
3. Log all other resources in core and extensions at the Request level.
4. Don't log watch requests by the "system:kube-proxy" on endpoints or

NEW QUESTION # 40
You have a Kubernetes cluster running a highly sensitive microservices application. You need to implement a strict security policy wnere only pods with specific labels can communicate with each other within the same namespace. How can you achieve this using NetworkPolicies?
Answer:
Explanation:
Solution (Step by Step) :
1. Define Label-Based Access: Identify the specific labels tnat pods within tne namespace Should have to allow communication. For example, let'S say pods with the labels Sapp: serviceAS and Sapp: serviceB' should be allowed to communicate, but other pods should be isolated.
2. Create NetworkPolicy: Create a NetworkPolicy YAML file named 'strict-communication.yaml to define the communication policy:

- This policy allows pods with the labels 'app: serviceA' or Sapp: serviced' to communicate witn each other. Other pods Within the same namespace are not allowed to communicate. 3. Apply Network Policy: Apply the NetworkPolicy using 'kubectr: bash kubectl apply -f strict-communication.yaml 4. Verify Network Policy: Verify the NetworkPolicy is applied: bash kubectl get networkpolicies -n 5. Test Access: Test communication between pods within the namespace. Pods with the specified labels Capp: serviceAS and Sapp: serviceB') should be able to communicate. Other pods should not be able to communicate with each other or with the labeled pods. This NetworkPolicy enforces a strict communication policy within the namespace. It restricts communication to pods with specific labels, effectively isolating other pods within the same namespace. This policy can be tuner customized to define more granular communication rules based on labels and other pod attributes.

NEW QUESTION # 41
Create a Pod name Nginx-pod inside the namespace testing, Create a service for the Nginx-pod named nginx-svc, using the ingress of your choice, run the ingress on tls, secure port.
  • A. Send us your Feedback on this.
Answer: A

NEW QUESTION # 42
You are running a critical web application on Kubernetes. You have implemented Pod Security Policies (PSPs) to enforce security restrictions on your pods. You want to configure PSPs to enforce the following security requirements:
Only allow specific image registries: Ensure pods can only pull images from authorized registries like 'docker.ios and 'gcr.ios. Restrict container privileges: Enforce the principle of least privilege by ensuring that only a minimum number of containers have root privileges. Limit resource usage: Prevent resource starvation by restricting the CPU and memory requests of pods.
Provide the detailed configuration for your PSP to enforce these security requirements.
Answer:
Explanation:
Solution (Step by Step) :
1. create a PSP YAML file:

2. Apply the PSP: bash kubectl apply -f restricted-psp.yaml 3. Create a Deployment with a securityContext

4. Apply the Deployment: bash kubectl apply -f myapp-deploymentyaml Note: This configuration assumes that the 'restricted-psps is applied to your entire namespace. You can use a more granular approach by applying the PSP to specific pods or deployments.

NEW QUESTION # 43
......
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CKS Valid Test Questions: https://www.pdfvce.com/Linux-Foundation/CKS-exam-pdf-dumps.html
P.S. Free 2026 Linux Foundation CKS dumps are available on Google Drive shared by PDFVCE: https://drive.google.com/open?id=1r2voWpRtoyploHEp6BksD8Ig7aBPS1i8
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