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Achieving the CKS certification demonstrates that an IT professional has mastered advanced Kubernetes security concepts and can effectively secure Kubernetes clusters in production environments. Certified Kubernetes Security Specialist (CKS) certification is recognized by the Cloud Native Computing Foundation (CNCF), which governs the Kubernetes project. As Kubernetes continues to be adopted by organizations, the need for Kubernetes security specialists will likely increase, making the CKS certification a valuable asset for IT professionals looking to advance their careers in this field.

The CKS certification exam is a rigorous assessment of the candidate's skills, covering a wide range of important topics such as hardening cluster components, securing network connectivity, and ensuring secure access to Kubernetes API and etcd. CKS exam consists of 15-20 performance-based tasks and scenarios that test the candidates' hands-on skills in securing a Kubernetes cluster. CKS Exam is three hours long and is proctored online.

The CKS certification exam is designed to test the candidate's Kubernetes security expertise in a real-world scenario. CKS exam is conducted online and consists of multiple-choice questions, performance-based tasks, and hands-on labs. CKS exam covers a wide range of topics including Kubernetes cluster setup, network policies, pod security policies, node security, container security, and RBAC (Role-Based Access Control). The CKS exam is a challenging exam that requires a deep understanding of Kubernetes security concepts and best practices. However, passing the exam is a great accomplishment that can help IT professionals advance their careers in the field of Kubernetes and container security.

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Linux Foundation Certified Kubernetes Security Specialist (CKS) Sample Questions (Q88-Q93):

NEW QUESTION # 88
Your Kubernetes cluster is configured with a default service account with broad permissions. You need to disable this default service account to enhance security and limit access to cluster resources.

Answer:

Explanation:
Solution (Step by Step):
1. Identify Default Service Account:
- Use the command 'kubectl get serviceaccount -n default default to identify the default service account in the default namespace.
2. Remove Default Service Account:
- You need to remove the default service account using the command 'kubectl delete serviceaccount default -n default
3. Review Permissions Check your RBAC configuration and ensure that no other roles or bindings grant unnecessary permissions to any other service accounts.
4. Create Custom Service Accounts: Create new, dedicated service accounts for each application or component that requires access to the cluster.
Assign specific roles or permissions to each service account based on its requirements.
Note: This process may require changes to your applications or configurations to use the new, dedicated service accounts instead of the default service account.

NEW QUESTION # 89
You can switch the cluster/configuration context using the following command: [desk@cli] $ kubectl config use-context qa Context: A pod fails to run because of an incorrectly specified ServiceAccount Task: Create a new service account named backend-qa in an existing namespace qa, which must not have access to any secret. Edit the frontend pod yaml to use backend-qa service account Note: You can find the frontend pod yaml at /home/cert_masters/frontend-pod.yaml

Answer:

Explanation:
[desk@cli] $ k create sa backend-qa -n qa sa/backend-qa created [desk@cli] $ k get role,rolebinding -n qa No resources found in qa namespace. [desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list # No access to secret [desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa [desk@cli] $ vim /home/cert_masters/frontend-pod.yaml apiVersion: v1 kind: Pod metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml pod created
[desk@cli] $ k create sa backend-qa -n qa serviceaccount/backend-qa created [desk@cli] $ k get role,rolebinding -n qa No resources found in qa namespace. [desk@cli] $ k create role backend -n qa --resource pods,namespaces,configmaps --verb list role.rbac.authorization.k8s.io/backend created [desk@cli] $ k create rolebinding backend -n qa --role backend --serviceaccount qa:backend-qa rolebinding.rbac.authorization.k8s.io/backend created [desk@cli] $ vim /home/cert_masters/frontend-pod.yaml apiVersion: v1 kind: Pod metadata:
name: frontend
spec:
serviceAccountName: backend-qa # Add this
image: nginx
name: frontend
[desk@cli] $ k apply -f /home/cert_masters/frontend-pod.yaml pod/frontend created https://kubernetes.io/docs/tasks/configure-pod-container/configure-service-account/

NEW QUESTION # 90
You are responsible for securing a Kubernetes cluster that runs multiple applications. You need to implement a solution that performs static analysis of the container images used in the cluster to identify potential vulnerabilities.

Answer:

Explanation:
Solution (Step by Step):
1. Choose a vulnerability scanning tool: There are many open-source and commercial tools available, such as Trivy, Anchore, and Clair-
2. Deploy the scanning tool in your cluster: This can be done by deploying the tool as a DaemonSet, so that it runs on every node, or by using a dedicated scanning service.

3. Configure the scanning tool to scan all container images in the cluster: This can be done by configuring the tool to scan images in your container registry or by scanning images as they are deployed.

4. Integrate the scanning tool with your CI/CD pipeline: This will allow you to scan images before they are deployed to the cluster.

5. Review and address any vulnerabilities identified by the scanning tool: Analyze the output of the scanning tool and take appropriate action to remediate any identified vulnerabilities.

NEW QUESTION # 91
Service is running on port 389 inside the system, find the process-id of the process, and stores the names of all the open-files inside the /candidate/KH77539/files.txt, and also delete the binary.

Answer:

Explanation:
root# netstat -ltnup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 127.0.0.1:17600 0.0.0.0:* LISTEN 1293/dropbox tcp 0 0 127.0.0.1:17603 0.0.0.0:* LISTEN 1293/dropbox tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 575/sshd tcp 0 0 127.0.0.1:9393 0.0.0.0:* LISTEN 900/perl tcp 0 0 :::80 :::* LISTEN 9583/docker-proxy tcp 0 0 :::443 :::* LISTEN 9571/docker-proxy udp 0 0 0.0.0.0:68 0.0.0.0:* 8822/dhcpcd
...
root# netstat -ltnup | grep ':22'
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 575/sshd
The ss command is the replacement of the netstat command.
Now let's see how to use the ss command to see which process is listening on port 22:
root# ss -ltnup 'sport = :22'
Netid State Recv-Q Send-Q Local Address:Port Peer Address:Port
tcp LISTEN 0 128 0.0.0.0:22 0.0.0.0:* users:("sshd",pid=575,fd=3))

NEW QUESTION # 92
You have an application running in a Kubernetes cluster that requires access to a database hosted in a different namespace. You want to implement a secure mecnanism to allow the application to access the database witnout granting it access to all resources in the database namespace.

Answer:

Explanation:
Solution (Step by Step) :
1. Create a Service Account in the Application Namespace:
- In the application's namespace, create a service account named 'db-access-sa'
2. Create a Role in the Database Namespace:
- In the database namespace, create a custom role named 'db-access-role' that grants only the required permissions to the database.
- For example, you might grant access to specific database tables, views, or stored procedures.
- Create a custom role named 'db-access-role' in the namespace where your database is running to grant only read permissions to the database.

3. Create a ROIeBinding in the Database Namespace: - In the database namespace, create a role binding named 'db-access-binding' that associates the 'db-access-sa' service account (from the application's namespace) with the 'db-access-role'.

4. Configure Your Application: - Configure your application deployment to use the 'db-access-sa' service account. - Use the Kubernetes API to connect to the database using the provided credentials or secrets.

NEW QUESTION # 93
......

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