Do I need the CKA before taking the CKS?

Yes. The CKS is the only Linux Foundation Kubernetes exam with a hard prerequisite: you must hold a valid, unexpired CKA before you can sit it. The CKAD does not count. If your CKA has lapsed, you have to renew it first, which is worth checking before you spend US$445 on a CKS registration.

What is the passing score for the CKS exam?

You need 67% or above to pass the CKS, one point higher than the 66% bar on the CKA and CKAD. It is performance-based, so that score comes from weighted hands-on tasks, and your report is emailed within 24 hours. The fee includes one free retake with a 12 month eligibility window.

How hard is the CKS exam?

Most candidates rate the CKS the hardest of the three Kubernetes certs. It assumes CKA-level cluster fluency and then tests security tooling on top: AppArmor and seccomp profiles, NetworkPolicies, admission control, audit logs, and supply chain checks, all against live clusters on a 2 hour clock.

How much does the CKS exam cost?

The CKS costs US$445 exam-only, the same as the CKA and CKAD. That includes one free retake, a 12 month eligibility window, and two sessions of the official exam simulator with 36 hours of access each. Bundles with an annual training subscription or the Kubernetes Security Essentials course run US$625 to US$645.

Is the CKS exam multiple choice?

No. Like the CKA and CKAD, the CKS is fully performance-based: 2 hours of live command-line tasks on real Kubernetes clusters. You will actually write NetworkPolicies, configure admission controllers, apply seccomp profiles, and read audit logs, which is why instant recall of the security objects matters so much.

Does the CKS certification expire?

Yes, the CKS is valid for 2 years, and because the prerequisite CKA must also stay valid, security specialists effectively maintain two certifications on a rolling basis. The exam tracks the newest Kubernetes minor version, currently v1.35, so the curriculum you renew against will have moved.

For platform and security engineers, the CKS is the strongest signal in the Kubernetes cert family precisely because of its prerequisite: everyone who holds it has passed two hands-on exams. US postings for platform security, DevSecOps, and senior SRE roles increasingly call it out, and supply chain security skills are in demand well beyond Kubernetes.

Certified Kubernetes Security Specialist

CKS Practice Exam: Certified Kubernetes Security Specialist Practice Questions

Upload your Kubernetes security notes, course PDFs, or the official curriculum, and the AI writes unlimited CKS practice questions with an answer key in seconds. Built for the current curriculum: pod security standards, supply chain security with SBOMs and artifact signing, AppArmor and seccomp, and the runtime security domain that separates a pass from a retake.

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The CKS exam is 2 hours long, performance-based (live command-line tasks on real clusters, not multiple choice), costs US$445, and requires a score of 67% or above to pass. It is the only Kubernetes cert with a prerequisite: you must hold a valid CKA first. The certification is valid for 2 years, and the fee includes one free retake, a 12 month eligibility window, and two sessions of the official exam simulator. The exam currently tests on Kubernetes v1.35. Six domains: Minimize Microservice Vulnerabilities 20%, Supply Chain Security 20%, Monitoring Logging and Runtime Security 20%, Cluster Setup 15%, Cluster Hardening 15%, System Hardening 10%.

Last updated July 2026

What the CKS exam tests on the current curriculum

We read the official CNCF curriculum document, as we do for every cert page on this site. Six domains, with an unusual shape: three domains tie at 20% each (microservice vulnerabilities, supply chain security, and runtime security), which together decide 60% of your score. There is no single center of gravity like the CKA's troubleshooting domain, so thin spots anywhere are expensive.

Domain	What is actually in it	Weight
Minimize Microservice Vulnerabilities	Pod security standards, managing Kubernetes Secrets, isolation techniques such as multi-tenancy and sandboxed containers, and pod-to-pod encryption with Cilium or Istio.	20%
Supply Chain Security	Minimizing base image footprint, understanding your supply chain (SBOMs, CI/CD, artifact repositories), securing it with permitted registries and artifact signing and validation, and static analysis of workloads and images with tools like Kubesec and KubeLinter.	20%
Monitoring, Logging and Runtime Security	Behavioral analytics to detect malicious activity, threat detection across infrastructure, apps, networks, data, users, and workloads, identifying phases of attack, container immutability at runtime, and Kubernetes audit logs.	20%
Cluster Setup	Network security policies for cluster-level access, CIS benchmark review of etcd, kubelet, kubedns, and kubeapi, Ingress objects with TLS, protecting node metadata and endpoints, and verifying platform binaries before deploying.	15%
Cluster Hardening	RBAC to minimize exposure, careful service account usage (disable defaults, minimize permissions), restricting access to the Kubernetes API, and upgrading Kubernetes to avoid vulnerabilities.	15%
System Hardening	Minimizing the host OS footprint, least-privilege identity and access management, minimizing external network access, and kernel hardening tools such as AppArmor and seccomp.	10%

Every task starts with knowing exactly which object, profile, or flag you need. Drill that recall: generate practice questions from your own Kubernetes security notes until NetworkPolicy selectors, seccomp profile fields, and admission controller names come back without thinking.

Format: Hands-on
Passing score: 67%
Prerequisite: Valid CKA
Exam fee: US$445

Why drill questions for a hands-on security exam?

Because the CKS punishes lookup time twice. First the CKA-level basics have to be automatic, then the security layer on top: which pod security standard blocks a privileged container, whether a seccomp profile is applied per-pod or per-container, what an egress NetworkPolicy needs to still allow DNS, which admission controller enforces image registries, where audit policy lives and what each level logs. None of that is typing skill; it is recall, and on a 2 hour clock recall you have to reconstruct is recall you do not have. Question drills move all of it into instant memory so your terminal time goes into configuring clusters, not remembering flags.

On the current curriculum

Pod security standards (not the retired PodSecurityPolicy), pod-to-pod encryption with Cilium or Istio, SBOMs and artifact signing in the supply chain domain, static analysis with Kubesec and KubeLinter, and CIS benchmark review of control plane components. The exam tests Kubernetes v1.35 and tracks each new minor version.

The staleness test for your course

Search your prep material for "SBOM" and "Cilium". If neither appears, the course predates the current curriculum: older CKS material was written before the supply chain domain named SBOMs and before pod-to-pod encryption named Cilium and Istio. Keep the course for fundamentals, but generate your practice questions from the current curriculum document.

Your US$445 already includes the official simulator (two sessions, 36 hours of access each). The winning order is cheap drills first, expensive rehearsals second: quiz yourself from your notes until the security objects are automatic, then spend the simulator sessions purely on speed under exam conditions.

CKS versus CKA and CKAD

The Linux Foundation runs three hands-on Kubernetes exams with the same format: 2 hours, live clusters, command line. The CKS sits at the top of the ladder, and it is the only one you cannot book cold.

	CKS	CKA	CKAD
Role	Security specialist: harden clusters, workloads, and the supply chain	Cluster administrator: install, operate, troubleshoot	Application developer: design and run apps on Kubernetes
Passing score	67%	66%	66%
Prerequisite	A valid CKA	None	None
Biggest domains	Three tied at 20%: microservice vulnerabilities, supply chain, runtime security	Troubleshooting, 30%	Application Environment, Configuration and Security, 25%
Who takes it	Security, DevSecOps, and senior platform engineers	Platform, DevOps, and SRE engineers	Backend and full-stack developers

Not CKA-certified yet? Start with the CKA practice exam, since a valid CKA is mandatory before you can even book the CKS. Developers shipping to clusters usually want the CKAD practice exam instead.

How to build CKS practice questions that actually transfer to the terminal

The exam grades doing. Your questions should drill the knowing that makes doing fast.

1 Upload current material: The CNCF curriculum PDF, your course notes, or pages from the Kubernetes security docs. If your course fails the SBOM test, add the current curriculum alongside it so the questions cover what the exam covers.
2 Weight it like the exam: The three 20% domains carry 60% of the score. Generate the most questions from microservice vulnerabilities, supply chain security, and runtime security, then backfill cluster setup and hardening.
3 Drill until recall is instant: Retake each set until pod security standards, seccomp fields, NetworkPolicy selectors, and audit policy levels come back in under five seconds. On a timed lab exam, slow recall is the same as no recall.
4 Finish in the simulator: Spend your two included simulator sessions last, on pure task speed: 36 hours of access each is plenty when you are no longer pausing to remember which profile or policy a task needs.

CKS exam questions, answered

Do I need the CKA before taking the CKS?: Yes, and it is a hard gate, not a recommendation: you must hold a valid, unexpired CKA before you can sit the CKS. The CKAD does not substitute. If your CKA expires before exam day, you renew it first. That makes the CKS effectively a two-exam credential, which is exactly why US employers weight it the way they do.
What is the passing score for the CKS exam?: 67% or above, one point higher than the CKA and CKAD bar. Tasks are weighted and partial credit exists within tasks, with the score report emailed within 24 hours of finishing. The fee includes one free retake, so a first miss buys you a domain-by-domain breakdown that tells you exactly where to drill before the second attempt.
How hard is the CKS exam?: Candidates who have taken all three Kubernetes exams usually call the CKS the hardest, for a structural reason: it stacks a security toolchain on top of skills the CKA already tested. You are expected to move through cluster tasks at CKA speed while also knowing AppArmor, seccomp, admission control, audit logging, image scanning, and NetworkPolicy design cold. The counterweight is the same honesty as its siblings: tasks, not trick questions.
How much does the CKS exam cost?: US$445 for the exam alone, which includes one free retake, a 12 month window to use your attempts, and two sessions of the official exam simulator with 36 hours of access each. Bundles run US$625 with an annual training subscription and US$645 with the Kubernetes Security Essentials course attached. Budget for the CKA first if you do not already hold one.
Is the CKS exam multiple choice?: No. It is 2 hours of live command-line tasks on real clusters, the same format as the CKA and CKAD. You cannot pass on recognition, which is precisely why question drills earn their keep: every security object you can recall instantly is a minute returned to actually configuring the cluster.
Does the CKS certification expire?: Yes, after 2 years, and there is a wrinkle its siblings do not have: the prerequisite CKA has to stay valid too, so CKS holders maintain two certifications on overlapping clocks. Renewal means the current exam version, and the curriculum tracks Kubernetes releases, so expect topics like supply chain tooling to have moved by then.
Is the CKS worth it?: If you work in platform security, DevSecOps, or senior SRE roles, it is the strongest credential in the Kubernetes family. The prerequisite means every holder has passed two hands-on exams, and the curriculum maps to work US companies are actively hiring for: supply chain security, runtime threat detection, and cluster hardening. For pure developers, the CKAD is the better fit.

PDFQuiz is not affiliated with, endorsed by, or sponsored by the Linux Foundation or the Cloud Native Computing Foundation. Kubernetes is a registered trademark of the Linux Foundation. This generator builds practice questions from material you upload and is a study aid, not a substitute for hands-on cluster practice. Always confirm current exam details on the official certification page before you book.

Related study tools

The CKS requires a valid CKA, so the CKA practice exam is the mandatory first stop. Developers on the same team usually want the CKAD practice exam, and infrastructure-as-code roles pair Kubernetes with the Terraform Associate practice exam. Broader security certs live on the CISSP practice questions page. Any study guide works with the certification exam generator, or start from any PDF with the PDF to practice test generator.

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