Real clusters for every Kubernetes cert.
A browser-based lab for the CKA, CKAD, and CKS exams. Every student gets their own real Kubernetes cluster, hands-on tasks scored by programmatic validators, and an attempt history that shows exactly what you missed — and why.
Certifications
Three exams. One lab engine.
Pick the certification you're studying for. Each has its own tasks, domains, quizzes, and a free Task of the Week. Buy them independently — one-time, no subscription.
Operate the cluster.
Cluster architecture, workloads, services & networking, storage, and the troubleshooting domain that's 30% of the exam. For ops, platform, and SRE.
Build & ship apps.
Designing, deploying, observing, and configuring workloads — pods, deployments, probes, config, and networking. For developers shipping to Kubernetes.
Harden & defend.
Cluster & system hardening, supply chain, and runtime security with Falco, Trivy, and Pod Security. The advanced exam — requires an active CKA.
What it does
Three things, done well.
No video courses. No fake simulators. Use quick quizzes to warm up, then work the same kind of cluster, the same kind of task, and the same kind of grader you'll meet on exam day — for whichever certification you're chasing.
Real Kubernetes, on demand.
Each attempt boots an isolated kind cluster wired through ttyd. SSH targets are real, kubectl is real, and the failure modes are real.
Programmatic validators.
Every task ships its own check script. You get partial credit for partial work, an output trace per question, and a reviewable diff between your state and the target.
Per-user attempt log.
Every finished exam — score, duration, missed tasks, the validator output, and the canonical solution — is saved to your console. Pattern-spot what you keep getting wrong.
How it works
From sign-up to scored, in four moves.
No installs. No local kubeconfig surgery. Open the lab, get a cluster, finish the tasks, read your report.
Create an account.
Email + password, or Google SSO. You land in your student console — profile, target score, sync clock.
Open the lab.
One click spins a 2-node kind cluster and an embedded desktop. Provisioning runs once across the whole exam.
Work in-context.
Each question gives you the target, a docs link, and a question rail beside the live workspace. Submit when satisfied.
Read the report.
Programmatic validators run on finish. Pass/fail, per-task feedback, and the canonical solution post to your history.
Pricing
Pay once, per certification.
Create a free account and solve a real graded Task of the Week on any exam — a new task every week, free. Go full access for 14 days, or buy a single attempt — no recurring charges either way. Each certification is its own one-time purchase.
- ✓Free account includes the Task of the Week · 1 graded task/week · any exam
- ✓Paid access unlocks every graded task · 120 minutes · unlimited retakes
- ✓Real on-demand kind cluster, every attempt
- ✓Programmatic, partial-credit validators
- ✓Persistent attempt log + canonical solutions
- ✓7-day refund, no questions asked
One full 120-minute exam attempt with all tasks, a real cluster, and programmatic scoring. Available for any of the three certs.
Pick an exam →Bulk seats across any cert, an admin console, aggregate progress reporting. Email [email protected] for a quote.
$29 covers the runtime, validators, and storage. We're not selling you a course or a membership — just the practice surface we wanted before our own exams.
this lab is independent practice — not the exam.
FAQ
Things people ask before signing up.
Which certification should I start with?
CKA if you operate clusters (ops, platform, SRE) — it's the broadest and a prerequisite for CKS. CKAD if you build and deploy apps onto clusters someone else runs. CKS is the advanced security exam and requires an active CKA first. Many people do CKA → CKAD or CKA → CKS. See the CKA, CKAD, and CKS pages for each curriculum.
Do I buy all three together, or separately?
Separately. Each certification is its own one-time $29 purchase (or $9.99 per single attempt). The free Task of the Week works on any of the three, so you can try a real graded task before you pick.
Is this affiliated with the Linux Foundation or CNCF?
No. prepium.sh is an independent practice environment. We track the published CKA, CKAD, and CKS curricula closely, but we are not the certifier.
Do I need to install anything?
No. Everything runs in your browser — the cluster, the desktop, the editor, the validators. You'll need a modern browser and a stable connection.
How accurate are the validators?
Each task ships with a check script that inspects cluster state — not a string match on your commands. There are usually multiple valid solutions; the grader rewards any of them and gives partial credit.
How does this compare to killer.sh?
Killer.sh gives you 2 sessions bundled with each exam purchase. prepium.sh gives you unlimited retakes for 14 days (or per-attempt pricing), a persistent attempt history with solutions, quizzes, and a free graded Task of the Week per cert. Both use real cluster environments.
Can my team use this?
Yes. Admins can provision accounts and watch aggregate progress from the admin console, across any of the three certifications. Talk to us about per-cohort licensing.
Pick an exam. Open a cluster.
CKA, CKAD, or CKS — real clusters, programmatic scoring, and a permanent attempt history. Start with a free graded Task of the Week; one-time $29 unlocks 14 days of full access to that certification.
- CKA · CKAD · CKS covered
- One-time $29 per cert · 14 days
- 7-day refund, no questions asked
- Real cluster, not a simulator
- Programmatic, partial-credit scoring
- Persistent, per-user attempt log