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Certified Kubernetes Security Specialist (CKS) Practice Test

140 questions available

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The Certified Kubernetes Security Specialist (CKS) certification is the industry's premier validation of advanced skills in securing container-based applications and Kubernetes platforms during build, deployment, and runtime. Awarded by the Cloud Native Computing Foundation (CNCF) and Linux Foundation, this performance-based exam certifies that a professional can perform critical security tasks under time constraints in a command-line environment. The CKS builds upon the foundational Certified Kubernetes Administrator (CKA) credential, focusing exclusively on security best practices, threat mitigation, and compliance enforcement within Kubernetes clusters. It covers the entire container lifecycle, from supply chain security and image vulnerability scanning to runtime security, network policy enforcement, and audit logging. Earning the CKS demonstrates to employers a proven, hands-on ability to harden Kubernetes deployments against modern threats, implement least-privilege access, and ensure cluster components meet organizational security benchmarks. This certification is essential for roles responsible for the security posture of cloud-native infrastructure in production environments.

Certification exam
2 hours Time Limit
Career Opportunities & Salary
Entry $69,244 - $104,244
Mid-Career $99,244 - $149,244
Senior $134,244 - $199,244
growing market
Why This Certification Opens Doors

In today's cloud-native landscape, security is not an afterthought but a foundational requirement. The CKS certification provides tangible, industry-recognized proof of your ability to design, build, and maintain secure Kubernetes environments. It directly impacts career advancement by qualifying you for high-demand roles such as Kubernetes Security Engineer, DevSecOps Specialist, and Cloud Security Architect. Organizations actively seek CKS holders to mitigate risks, ensure compliance, and protect critical assets, making this credential a powerful differentiator that commands premium compensation and signifies elite expertise within the Kubernetes ecosystem.

Recommended

Prerequisite Active CKA certification required
Exam Blueprint

Each domain is weighted to match the real certification exam, so a full practice simulation predicts your result.

01Minimize Microservice VulnerabilitiesUse appropriate pod security standards, Manage Kubernetes secrets, Understand and implement isolation techniques (multi-tenancy, sandboxed containers, etc.), Implement Pod-to-Pod encryption (Cilium, Istio)
20%
02Monitoring, Logging and Runtime SecurityPerform behavioral analytics to detect malicious activities, Detect threats within physical infrastructure, apps, networks, data, users and workloads, Investigate and identify phases of attack and bad actors within the environment, Ensure immutability of containers at runtime, Use Kubernetes audit logs to monitor access
20%
03Supply Chain SecurityMinimize base image footprint, Understand your supply chain (e.g. SBOM, CI/CD, artifact repositories), Secure your supply chain (permitted registries, sign and validate artifacts, etc.), Perform static analysis of user workloads and container images (e.g. Kubesec, KubeLinter)
20%
04Cluster HardeningUse Role Based Access Controls to minimize exposure, Exercise caution in using service accounts e.g. disable defaults, minimize permissions on newly created ones, Restrict access to Kubernetes API, Upgrade Kubernetes to avoid vulnerabilities
15%
05Cluster SetupUse Network security policies to restrict cluster level access, Use CIS benchmark to review the security configuration of Kubernetes components (etcd, kubelet, kubedns, kubeapi), Properly set up Ingress with TLS, Protect node metadata and endpoints, Verify platform binaries before deploying
15%
06System HardeningMinimize host OS footprint (reduce attack surface), Using least-privilege identity and access management, Minimize external access to the network, Appropriately use kernel hardening tools such as AppArmor, seccomp
10%
Exam Details CKS | $395 USD | 2 hours
Exam Code CKS
Vendor CNCF
Exam Cost $395 USD
Passing Score 67
Time Limit 2 hours
Question Types Multiple Choice (100%)
Retake Policy One free retake attempt is included with the exam purchase. A minimum 12-hour waiting period is required between attempts. The free retake must be used within 12 months of the original purchase.
Exam Format Performance-based (hands-on terminal)
Online Proctoring Available
Study Resources
Kubernetes Fundamentals (LFS258)
Linux FoundationFree
Official preparation course for CKA
View
Kubernetes for Developers (LFD259)
Linux FoundationFree
Official preparation course for CKAD
View
Frequently Asked Questions

What are the prerequisites for taking the CKS exam?

A current Certified Kubernetes Administrator (CKA) certification is a mandatory prerequisite. The CKA must be active (not expired) at the time of scheduling and taking the CKS exam. This ensures all candidates possess the essential cluster operations knowledge upon which the security specialization is built.

How is the CKS exam structured and delivered?

The CKS is a 2-hour, performance-based exam proctored remotely online. It consists of 15-20 practical, command-line tasks that must be performed on a live Kubernetes cluster. Candidates are evaluated on their ability to correctly and efficiently solve real-world security problems, such as fixing misconfigurations, implementing policies, and analyzing cluster events.

How does the CKS differ from the CKA and CKAD?

The CKA focuses on cluster administration, lifecycle management, and troubleshooting. The CKAD focuses on application deployment and orchestration. The CKS is a security-focused specialization that assumes and builds upon the operational knowledge of the CKA. It delves deeply into securing the supply chain, cluster components, and workloads, which are only lightly covered in the other certifications.

What is the recertification policy for the CKS?

The CKS certification is valid for three years from the date of issuance. To maintain the certified status, holders must recertify by passing the current version of the exam before their certification expires. This ensures professionals maintain up-to-date knowledge with the evolving Kubernetes security landscape.

What are the key job roles for CKS-certified professionals?

CKS holders are qualified for roles such as Kubernetes Security Engineer, Cloud Security Specialist, DevSecOps Engineer, Platform Security Architect, and Site Reliability Engineer (SRE) with a security focus. These positions are critical in organizations running containerized workloads in production, particularly in finance, healthcare, technology, and government sectors.

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