Linux Foundation CKS Exam Questions

Name: Linux Foundation CKS Exam
Brand: Pass4Success
SKU: CKS
Price: 69.00 USD
Availability: InStock
Rating: 5.0 (121 reviews)

Exam Name: Certified Kubernetes Security Specialist

Exam Code: CKS

Related Certification(s): Linux Foundation Kubernetes Security Specialist Certification

Certification Provider: Linux Foundation

Actual Exam Duration: 120 Minutes

Number of CKS practice questions in our database: 48 (updated: Jun. 26, 2025)

Expected CKS Exam Topics, as suggested by Linux Foundation :

Topic 1: Cluster Setup: This topic assesses the skills of Kubernetes practitioners in configuring secure Kubernetes clusters. It covers network security policies, CIS benchmarks, ingress security, node metadata protection, minimizing GUI access, and verifying platform binaries. Proficiency in these areas ensures a secure foundation for Kubernetes deployments.
Topic 2: Cluster Hardening: Cluster hardening focuses on securing Kubernetes API access, utilizing Role-Based Access Controls, managing service accounts, and keeping Kubernetes updated. This CKS exam topic measures Kubernetes practitioners' ability to enhance cluster security by reducing exposure and managing permissions effectively.
Topic 3: System Hardening: It involves minimizing the host OS footprint, managing IAM roles, limiting network access, and using kernel hardening tools like AppArmor and seccomp. The topic tests the skills of Kubernetes practitioners that are required to secure the underlying OS and its interactions with Kubernetes.
Topic 4: Minimize Microservice Vulnerabilities: This topic of the Linux Foundation Kubernetes Security Specialist exam evaluates techniques to secure microservices, including OS-level security domains, managing Kubernetes secrets, using container runtime sandboxes, and implementing pod-to-pod encryption. It measures the ability to safeguard against vulnerabilities within a multi-tenant environment.
Topic 5: Supply Chain Security: Supply chain security addresses securing base images, whitelisting registries, signing images, performing static analysis, and scanning for vulnerabilities. The CKA exam assesses the skills of Kubernetes practitioners in protecting the entire supply chain of containerized applications from creation to deployment.
Topic 6: Monitoring, Logging, and Runtime Security: This area of the Certified Kubernetes Security Specialist exam focuses on behavioral analytics, threat detection across infrastructure, and ensuring container immutability. The proficiency of the Kubernetes practitioner here demonstrates the ability to maintain security and investigate incidents effectively.

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Natalya

8 days ago

The exam had questions on network security beyond just policies. Understand how to use tools like Calico for advanced network security features.

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Onita

17 days ago

New CKS here! Pass4Success, thanks for the efficient study materials.

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Tamar

2 months ago

Kubernetes upgrade security was tested. Know the process of safely upgrading a cluster and verifying security settings post-upgrade. Pass4Success really prepared me for this topic!

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Margery

2 months ago

Passed CKS on my first try. Pass4Success questions were spot on!

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Vallie

3 months ago

I encountered scenarios on container runtime security. Understand how to configure and use seccomp and AppArmor profiles to restrict container capabilities.

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Truman

3 months ago

CKS certification achieved! Pass4Success made last-minute prep possible.

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Arminda

3 months ago

Just passed the CKS exam! The last section tested incident response in Kubernetes. Practice creating and executing incident response plans. Thanks to Pass4Success for the comprehensive prep materials!

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Sunshine

4 months ago

I had to deal with Kubernetes audit logging. Understand how to configure and analyze audit logs to detect security events. Practice interpreting log entries.

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Fletcher

4 months ago

Nailed the Kubernetes Security exam. Pass4Success, you're the real MVP!

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Alease

4 months ago

Open Policy Agent (OPA) and Gatekeeper were featured. Know how to write and apply policies to enforce security standards across your cluster.

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Eleonore

5 months ago

The exam tested knowledge on minimizing microservice vulnerabilities. Practice analyzing and fixing security issues in Kubernetes manifests. Pass4Success questions were spot on for this!

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Geoffrey

5 months ago

CKS exam conquered! Pass4Success, your practice tests were lifesavers.

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Barbra

5 months ago

Cluster hardening was a significant part. I had to disable unnecessary services and limit node access. Know how to secure kubelet and set proper permissions.

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Francoise

5 months ago

Thrilled to have passed the Kubernetes Security Specialist exam! The Pass4Success practice questions were a great help. One question that I found difficult was about system hardening, specifically how to configure SELinux policies for Kubernetes nodes. I wasn't entirely confident, but I passed.

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Deane

6 months ago

The exam included scenarios on securing service accounts. Know how to manage and restrict service account tokens and permissions.

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Hermila

6 months ago

Successfully cleared CKS. Pass4Success questions were incredibly relevant.

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Blossom

6 months ago

I encountered questions on Kubernetes secrets management. Know how to create, use, and rotate secrets securely. Understanding encryption at rest is important too.

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Felix

7 months ago

I passed the Kubernetes Security Specialist exam, and I owe a lot to the Pass4Success practice questions. There was a tough question on monitoring, logging, and runtime security, asking how to set up Prometheus to monitor Kubernetes clusters. I wasn't completely sure, but I still managed to pass.

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William

7 months ago

The exam included scenarios on securing container images. Practice using tools like Trivy to scan for vulnerabilities and interpret scan results.

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Jolanda

7 months ago

Passed the CKS exam with flying colors. Kudos to Pass4Success for the help!

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Micaela

7 months ago

Just passed the Kubernetes Security Specialist exam, and the practice questions from Pass4Success were invaluable. One question that puzzled me was about minimizing microservice vulnerabilities, specifically how to use PodSecurityPolicies to restrict container privileges. I wasn't entirely sure, but I passed nonetheless.

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Eladia

7 months ago

Runtime security was a key topic. I had to work with tools like Falco to detect and respond to security threats. Familiarize yourself with Falco rules and how to interpret its output.

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Sherita

8 months ago

I successfully passed the Kubernetes Security Specialist exam, and Pass4Success practice questions were a key part of my preparation. There was a question on supply chain security that asked how to verify the integrity of container images using Notary. I was a bit uncertain, but I still passed the exam.

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Adolph

8 months ago

Securing the Kubernetes API server was emphasized. Know how to configure and audit API server flags for security best practices. Pass4Success practice questions really helped me prepare for this!

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Janet

8 months ago

CKS certified! Pass4Success materials were key to my quick preparation.

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8 months ago

Happy to share that I passed the Kubernetes Security Specialist exam! The Pass4Success practice questions were a big help. One question that caught me off guard was about cluster setup, asking how to configure etcd for high availability. I wasn't sure about the exact steps, but I managed to pass.

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Camellia

9 months ago

The exam tested my knowledge of RBAC. I had to create roles and role bindings to grant specific permissions. Study the different API resources and verbs used in RBAC.

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Tarra

9 months ago

I passed the Kubernetes Security Specialist exam, thanks in part to the practice questions from Pass4Success. One challenging question was about cluster hardening, specifically how to enforce network policies to isolate namespaces. I wasn't completely confident in my answer, but I still passed.

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Glynda

9 months ago

Aced the Kubernetes Security Specialist exam. Pass4Success made prep a breeze!

upvoted 0 times

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Hassie

9 months ago

Network policies were a big part of my exam. Practice creating and troubleshooting them to control traffic between pods. Understanding ingress and egress rules is crucial.

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Jesus

9 months ago

Just cleared the Kubernetes Security Specialist exam, and Pass4Success was a great resource. There was a tricky question on system hardening that asked how to implement AppArmor profiles to restrict container capabilities. I was a bit unsure about the exact syntax, but I still managed to get through the exam.

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Julene

10 months ago

Just passed the CKS exam! Glad I studied Pod Security Policies. Had to analyze and modify PSPs to enforce security constraints. Make sure you understand PSP syntax and how to apply them.

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Loren

10 months ago

I recently passed the Linux Foundation Certified Kubernetes Security Specialist exam, and I have to say, the Pass4Success practice questions were incredibly helpful. One question that stumped me was about setting up monitoring and logging for runtime security. It asked how to configure Fluentd to collect logs from all nodes in a Kubernetes cluster. I wasn't entirely sure about the configuration details, but I managed to pass the exam.

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Billye

10 months ago

Just passed the CKS exam! Thanks Pass4Success for the spot-on practice questions.

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Nadine

1 years ago

Just passed the CKS exam! One tricky area was Pod Security Policies. Expect questions on configuring and troubleshooting PSPs. Study the different policy options and their impact on pod creation. Big thanks to Pass4Success for their spot-on practice questions that helped me prepare quickly!

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Free Linux Foundation CKS Exam Actual Questions

Note: Premium Questions for CKS were last updated On Jun. 26, 2025 (see below)

Question #1

Fix all issues via configuration and restart the affected components to ensure the new setting takes effect.

Fix all of the following violations that were found against theAPI server:-

a. Ensure the --authorization-mode argument includes RBAC

b. Ensure the --authorization-mode argument includes Node

c. Ensure that the --profiling argument is set to false

Fix all of the following violations that were found against theKubelet:-

a. Ensure the --anonymous-auth argument is set to false.

b. Ensure that the --authorization-mode argument is set to Webhook.

Fix all of the following violations that were found against theETCD:-

a. Ensure that the --auto-tls argument is not set to true

Hint: Take the use of Tool Kube-Bench

AExplanation:
API server:
Ensure the --authorization-mode argument includes RBAC
Turn on Role Based Access Control.
Role Based Access Control (RBAC) allows fine-grained control over the operations that different entities can perform on different objects in the cluster. It is recommended to use the RBAC authorization mode.
Fix - Buildtime
Kubernetes
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
component: kube-apiserver
tier: control-plane
name: kube-apiserver
namespace: kube-system
spec:
containers:
- command:
+ - kube-apiserver
+ - --authorization-mode=RBAC,Node
image: gcr.io/google_containers/kube-apiserver-amd64:v1.6.0
livenessProbe:
failureThreshold: 8
httpGet:
host: 127.0.0.1
path: /healthz
port: 6443
scheme: HTTPS
initialDelaySeconds: 15
timeoutSeconds: 15
name: kube-apiserver-should-pass
resources:
requests:
cpu: 250m
volumeMounts:
- mountPath: /etc/kubernetes/
name: k8s
readOnly: true
- mountPath: /etc/ssl/certs
name: certs
- mountPath: /etc/pki
name: pki
hostNetwork: true
volumes:
- hostPath:
path: /etc/kubernetes
name: k8s
- hostPath:
path: /etc/ssl/certs
name: certs
- hostPath:
path: /etc/pki
name: pki
Ensure the --authorization-mode argument includes Node
Remediation:Edit the API server pod specification file/etc/kubernetes/manifests/kube-apiserver.yamlon the master node and set the--authorization-modeparameter to a value that includesNode.
--authorization-mode=Node,RBAC
Audit:
/bin/ps -ef | grep kube-apiserver | grep -v grep
Expected result:
'Node,RBAC' has 'Node'
Ensure that the --profiling argument is set to false
Remediation:Edit the API server pod specification file/etc/kubernetes/manifests/kube-apiserver.yamlon the master node and set the below parameter.
--profiling=false
Audit:
/bin/ps -ef | grep kube-apiserver | grep -v grep
Expected result:
'false' is equal to 'false'
Fix all of the following violations that were found against theKubelet:-
Ensure the --anonymous-auth argument is set to false.
Remediation:If using a Kubelet config file, edit the file to set authentication:anonymous: enabled tofalse. If using executable arguments, edit the kubelet service file/etc/systemd/system/kubelet.service.d/10-kubeadm.confon each worker node and set the below parameter inKUBELET_SYSTEM_PODS_ARGSvariable.
--anonymous-auth=false
Based on your system, restart the kubelet service. For example:
systemctl daemon-reload
systemctl restart kubelet.service
Audit:
/bin/ps -fC kubelet
Audit Config:
/bin/cat /var/lib/kubelet/config.yaml
Expected result:
'false' is equal to 'false'
2) Ensure that the --authorization-mode argument is set to Webhook.
Audit
docker inspect kubelet | jq -e '.[0].Args[] | match('--authorization-mode=Webhook').string'
Returned Value:--authorization-mode=Webhook
Fix all of the following violations that were found against theETCD:-
a. Ensure that the --auto-tls argument is not set to true
Do not use self-signed certificates for TLS. etcd is a highly-available key value store used by Kubernetes deployments for persistent storage of all of its REST API objects. These objects are sensitive in nature and should not be available to unauthenticated clients. You should enable the client authentication via valid certificates to secure the access to the etcd service.
Fix - Buildtime
Kubernetes
apiVersion: v1
kind: Pod
metadata:
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
creationTimestamp: null
labels:
component: etcd
tier: control-plane
name: etcd
namespace: kube-system
spec:
containers:
- command:
+ - etcd
+ - --auto-tls=true
image: k8s.gcr.io/etcd-amd64:3.2.18
imagePullPolicy: IfNotPresent
livenessProbe:
exec:
command:
- /bin/sh
- -ec
- ETCDCTL_API=3 etcdctl --endpoints=https://[192.168.22.9]:2379 --cacert=/etc/kubernetes/pki/etcd/ca.crt
--cert=/etc/kubernetes/pki/etcd/healthcheck-client.crt --key=/etc/kubernetes/pki/etcd/healthcheck-client.key
get foo
failureThreshold: 8
initialDelaySeconds: 15
timeoutSeconds: 15
name: etcd-should-fail
resources: {}
volumeMounts:
- mountPath: /var/lib/etcd
name: etcd-data
- mountPath: /etc/kubernetes/pki/etcd
name: etcd-certs
hostNetwork: true
priorityClassName: system-cluster-critical
volumes:
- hostPath:
path: /var/lib/etcd
type: DirectoryOrCreate
name: etcd-data
- hostPath:
path: /etc/kubernetes/pki/etcd
type: DirectoryOrCreate
name: etcd-certs
status: {}

Reveal Solution

Correct Answer: A

Question #2

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.

AExplanation:
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

Reveal Solution

Correct Answer: A

Question #3

Create a new ServiceAccount named backend-sa in the existing namespace default, which has the capability to list the pods inside the namespace default.

Create a new Pod named backend-pod in the namespace default, mount the newly created sa backend-sa to the pod, and Verify that the pod is able to list pods.

Ensure that the Pod is running.

AExplanation:
A service account provides an identity for processes that run in a Pod.
When you (a human) access the cluster (for example, usingkubectl), you are authenticated by the apiserver as a particular User Account (currently this is usuallyadmin, unless your cluster administrator has customized your cluster). Processes in containers inside pods can also contact the apiserver. When they do, they are authenticated as a particular Service Account (for example,default).
When you create a pod, if you do not specify a service account, it is automatically assigned thedefaultservice account in the same namespace. If you get the raw json or yaml for a pod you have created (for example,kubectl get pods/ -o yaml), you can see thespec.serviceAccountNamefield has beenautomatically set.
You can access the API from inside a pod using automatically mounted service account credentials, as described inAccessing the Cluster. The API permissions of the service account depend on theauthorization plugin and policyin use.
In version 1.6+, you can opt out of automounting API credentials for a service account by settingautomountServiceAccountToken: falseon the service account:
apiVersion: v1
kind: ServiceAccount
metadata:
name: build-robot
automountServiceAccountToken: false
...
In version 1.6+, you can also opt out of automounting API credentials for a particular pod:
apiVersion: v1
kind: Pod
metadata:
name: my-pod
spec:
serviceAccountName: build-robot
automountServiceAccountToken: false
...
The pod spec takes precedence over the service account if both specify aautomountServiceAccountTokenvalue.

Reveal Solution

Correct Answer: A

Question #4

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.

Reveal Solution

Correct Answer: A

Question #5

You must complete this task on the following cluster/nodes: Cluster:trace Master node:master Worker node:worker1 You can switch the cluster/configuration context using the following command: [desk@cli] $kubectl config use-context trace Given: You may use Sysdig or Falco documentation. Task: Use detection tools to detect anomalies like processes spawning and executing something weird frequently in the single container belonging to Podtomcat. Two tools are available to use: 1. falco 2. sysdig Tools are pre-installed on the worker1 node only. Analyse the container's behaviour for at least 40 seconds, using filters that detect newly spawning and executing processes. Store an incident file at/home/cert_masters/report, in the following format: [timestamp],[uid],[processName] Note:Make sure to store incident file on the cluster's worker node, don't move it to master node.

AExplanation:
$vim /etc/falco/falco_rules.local.yaml
- rule: Container Drift Detected (open+create)
desc: New executable created in a container due to open+create
condition: >
evt.type in (open,openat,creat) and
evt.is_open_exec=true and
container and
not runc_writing_exec_fifo and
not runc_writing_var_lib_docker and
not user_known_container_drift_activities and
evt.rawres>=0
output: >
%evt.time,%user.uid,%proc.name # Add this/Refer falco documentation
priority: ERROR
$kill -1 <PID of falco>
Explanation
[desk@cli] $ssh node01
[node01@cli] $vim /etc/falco/falco_rules.yaml
search for Container Drift Detected & paste in falco_rules.local.yaml
[node01@cli] $vim /etc/falco/falco_rules.local.yaml
- rule: Container Drift Detected (open+create)
desc: New executable created in a container due to open+create
condition: >
evt.type in (open,openat,creat) and
evt.is_open_exec=true and
container and
not runc_writing_exec_fifo and
not runc_writing_var_lib_docker and
not user_known_container_drift_activities and
evt.rawres>=0
output: >
%evt.time,%user.uid,%proc.name # Add this/Refer falco documentation
priority: ERROR
[node01@cli] $vim /etc/falco/falco.yaml

Reveal Solution

Correct Answer: A

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