Try Linux Foundation : CKS valid & accurate questions and answers
Last Updated: Oct 27, 2026
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Amateurs compile lists; professionals build frameworks. The Exams-boost expert team holds itself to exacting standards — 66 practice questions for the CKS exam, every answer verified, every topic mapped to the syllabus.
Linux Foundation CKS Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Monitoring, Logging, and Runtime Security | 20% | - Understand and monitor network traffic - Minimize the attack surface using container health indicators - Falco - container security monitoring and threat detection - Audit and detect logs and events for anomalies - Detect threats at the container level - Perform behavioral analytics to detect malicious activity |
| System Hardening | 15% | - Understand the concept of OPA (Open Policy Agent) and Gatekeeper - Kernel defaults and parameters using sysctl - Modify host components to improve security - Enable audit logging |
| Minimize Microservice Vulnerabilities | 20% | - Set appropriate security contexts for pods and containers - Understand the principle of immutable containers - Configure network policies for namespace isolation - Use AppArmor or seccomp profiles to constrain container behavior - Use PSP to enforce security controls - Use OPA Gatekeeper to enforce security controls |
| Supply Chain Security | 20% | - Use image admission controllers to prevent use of untrusted images - Use static analysis tools to detect vulnerabilities - Minimize base image footprint - Understand the software supply chain best practices - Understand image security scanning and its workflow - Use distroless images for static workload - Understand the container build process - Sign container images and verify signatures |
| Cluster Hardening | 15% | - Minimize admission of containers with allowPrivilegeEscalation - Minimize admission of containers with raw block devices - Minimize admission of containers with FlexVolume volumes - Minimize admission of containers with hostPath volumes - Minimize admission of containers that allow host namespaces - Minimize admission of containers with added capabilities - Minimize admission of containers with sharing the host process namespace - Minimize admission of containers without a security context - Minimize admission of containers with sharing the host network namespace - Minimize admission of containers without seccomp profiles - Minimize admission of privileged containers - Minimize admission of containers with sharing the host IPC namespace - Minimize admission of containers without AppArmor profile - Minimize admission of containers with capabilities assigned |
| Cluster Setup | 10% | - Use Pod Security Policies to control security-related pod behaviors - Manage sensitive information in clusters - Configure TLS certificates and minimum version for etcd - Understand the security implications of embedding cloud provider flags - Implement Pod-to-Pod encryption using mTLS or WireGuard - Use role-based access control (RBAC) to minimize exposure - Use Cis benchmarks to check Kubernetes cluster settings |
Common Questions About the Linux Foundation Certified Kubernetes Security Specialist (CKS) Exam
The CKS exam is a Linux Foundation certification exam validating the Linux Foundation Certified Kubernetes Security Specialist (CKS) syllabus shown above. It belongs to these credential paths: CKA (Certified Kubernetes Administrator). Candidates in 2026 prepare for it with Exams-boost's 66 practice questions, available as a printable PDF, a Windows Desktop Test Engine, and an Online Test Engine — three versions of the same materials.
Online proctored exam (remote) or at a testing center Register for the Linux Foundation Certified Kubernetes Security Specialist (CKS) exam through these official channels:
After booking, Exams-boost delivers your practice questions within 1 minute — preparation starts the same day.
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The Linux Foundation Certified Kubernetes Security Specialist (CKS) exam contains 15-20 to complete within 120 minutes. Timed simulation in the Exams-boost Desktop Test Engine teaches that rhythm before exam day does.
The official Linux Foundation Certified Kubernetes Security Specialist (CKS) outline defines 6 domains. The leading three are Monitoring, Logging, and Runtime Security (20%), Minimize Microservice Vulnerabilities (20%), and Cluster Setup (10%). The full list is in the topics section above, and Exams-boost's 66 practice questions cover each one.
Linux Foundation recommends these training resources for the Linux Foundation Certified Kubernetes Security Specialist (CKS) exam:
Follow the training with steady self-testing — the 66 practice questions from Exams-boost help you apply theory and fill any gaps the training leaves.
CKA (Certified Kubernetes Administrator) certification is required before taking CKS Since requirements change over time, confirm the latest on the official Linux Foundation exam page before scheduling.
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The Linux Foundation Certified Kubernetes Security Specialist (CKS) exam requires 66% to pass, and registration costs $395 USD. A failed attempt means paying the same fee again — a readiness check with the Exams-boost engines before booking is the cheaper option.
Linux Foundation Certified Kubernetes Security Specialist (CKS) Sample Questions:
SIMULATION
Documentation Secrets, TLS Secrets, Volumes
You must connect to the correct host . Failure to do so may result in a zero score.
[candidate@base] $ ssh cks000m40
Path
Key
Context
You must complete securing access to a web server using SSL files stored in a TLS Secret .
Task
Create a TLS Secret named clever-cactus in the clever-cactus namespace for an existing Deployment named clever-cactus.
Use the following SSL files:
File
Certificate /home/candidate/clever-cactus/web.k8s.local.crt
/home/candidate/clever-cactus/web.k8s.local.key
The Deployment is already configured to use the TLS Secret.
Do not modify the existing Deployment.
Failure to do so may result in a reduced score.
Correct Answer:
See the Explanation below for complete solution
Explanation:
1) Connect to the correct host
ssh cks000m40
sudo -i
export KUBECONFIG=/etc/kubernetes/admin.conf
2) Verify namespace exists (quick check)
kubectl get ns clever-cactus
3) Verify certificate and key files exist
ls -l /home/candidate/clever-cactus/web.k8s.local.crt
ls -l /home/candidate/clever-cactus/web.k8s.local.key
Both files must exist.
4) Create the TLS Secret (THIS IS THE MAIN TASK)
Create a TLS Secret named clever-cactus in namespace clever-cactus:
kubectl -n clever-cactus create secret tls clever-cactus \
--cert=/home/candidate/clever-cactus/web.k8s.local.crt \
--key=/home/candidate/clever-cactus/web.k8s.local.key
Do NOT use apply
Do NOT edit the Deployment
5) Verify the Secret
kubectl -n clever-cactus get secret clever-cactus
Expected type:
kubernetes.io/tls
Optional detail check:
kubectl -n clever-cactus describe secret clever-cactus
You should see:
tls.crt
tls.key
6) (Optional) Confirm Pods are running
Since the Deployment is already configured to use the Secret, Pods should now work.
kubectl -n clever-cactus get pods
SIMULATION
Using the runtime detection tool Falco, Analyse the container behavior for at least 20 seconds, using filters that detect newly spawning and executing processes in a single container of Nginx.
store the incident file art /opt/falco-incident.txt, containing the detected incidents. one per line, in the format
[timestamp],[uid],[processName]
Correct Answer:
Send us your feed back on it
SIMULATION
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://test-server.local.8081/image_policy
1. Enable the admission plugin.
2. Validate the control configuration and change it to implicit deny.
Finally, test the configuration by deploying the pod having the image tag as latest.
Correct Answer:
SeetheExplanationbelowExplanation:
ssh-add ~/.ssh/tempprivate
eval "$(ssh-agent -s)"
cd contrib/terraform/aws
vi terraform.tfvars
terraform init
terraform apply -var-file=credentials.tfvars
ansible-playbook -i ./inventory/hosts ./cluster.yml -e ansible_ssh_user=core -e bootstrap_os=coreos -b --become-user=root --flush-cache -e ansible_user=core
SIMULATION
Create a new NetworkPolicy named deny-all in the namespace testing which denies all traffic of type ingress and egress traffic
Correct Answer:
You can create a "default" isolation policy for a namespace by creating a NetworkPolicy that selects all pods but does not allow any ingress traffic to those pods.
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: default-deny-ingress
spec:
podSelector: {}
policyTypes:
- Ingress
You can create a "default" egress isolation policy for a namespace by creating a NetworkPolicy that selects all pods but does not allow any egress traffic from those pods.
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: allow-all-egress
spec:
podSelector: {}
egress:
- {}
policyTypes:
- Egress
Default deny all ingress and all egress traffic
You can create a "default" policy for a namespace which prevents all ingress AND egress traffic by creating the following NetworkPolicy in that namespace.
---
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: default-deny-all
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
This ensures that even pods that aren't selected by any other NetworkPolicy will not be allowed ingress or egress traffic.
SIMULATION
Create a network policy named allow-np, that allows pod in the namespace staging to connect to port 80 of other pods in the same namespace.
Ensure that Network Policy:-
1. Does not allow access to pod not listening on port 80.
2. Does not allow access from Pods, not in namespace staging.
Correct Answer:
See the Explanation belowExplanation:
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: network-policy
spec:
podSelector: {} #selects all the pods in the namespace deployed
policyTypes:
- Ingress
ingress:
- ports: #in input traffic allowed only through 80 port only
- protocol: TCP
port: 80
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