Learn the commands free in guided simulators for Linux, Docker, Git, Kubernetes, Terraform and more. Then prove it with AI mock interviews, timed mock exams, and labs on a real Postgres.
Every guided simulator is free forever: Linux, Docker, Git, Kubernetes, Terraform, RBAC and PromQL. No card to start.
A pod is stuck in CrashLoopBackOff. Walk me through how you'd debug it, step by step.
Reading about DevOps does not get you hired. Doing it does. Start with the free simulators, then test yourself the way an interviewer would.
Step-by-step lessons in a safe browser simulation: type the command, see what it does, and keep your progress. The SQL terminal runs on a real Postgres. No card, no setup.
The simulators teach the commands. For databases you get the real thing: a live Postgres, isolated on its own branch, seeded and ready. Run the query, read the plan, break the index, and reset it on the next attempt.
-- events has 50,000 rows and this query is slow lab=> EXPLAIN ANALYZE SELECT * FROM events WHERE user_id = 42 ORDER BY created_at DESC; Seq Scan on events (cost=0..48210) CREATE INDEX ON events (user_id, created_at DESC); EXPLAIN ANALYZE SELECT * FROM events WHERE user_id = 42 ORDER BY created_at DESC;
Ten minutes tells you where you stand across Linux, Kubernetes, cloud, and CI/CD.
Practice the commands free in the simulators, then use quizzes and mock interviews on the topics you missed.
You have explained your answers and practiced the commands before the interview.
The simulators and a weekly allowance stay free forever. Pro is one subscription for the interviews, the exams, and every lab. Cancel any time.
Learn the commands. No card needed.
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Yes. The guided simulators (Linux, Docker, Git, merge conflicts, Kubernetes, RBAC, Terraform and PromQL) are free forever. A free account also gets 3 reviewed quizzes each week, one mini mock interview with real AI grading, one 10-question mock exam preview, and one session on a real Postgres database (the SQL terminal or a lab). Pro adds unlimited mock interviews (fair use), full timed mock exams and certificates, spaced review, custom AI topics, and every lab.
No. The Linux, Docker, Git, and Kubernetes simulators are guided lessons in a safe browser simulation: you type real commands and see what they do, with nothing to install. The SQL terminal and the labs run on a real Postgres.
Each lab creates its own Postgres branch, seeded and isolated, and you run real SQL against it from the browser. When you finish, the branch is dropped. Nothing you do touches anyone else.
DevOps, SRE, platform, and cloud engineering interviews, from mid-level to senior. The certification paths cover AWS SAA, AWS DevOps Pro, Azure AZ-104, Azure AZ-400, GCP ACE, Terraform Associate, CKA, CKAD, CKS, Claude Code.
Yes. Manage or cancel your subscription from the billing portal in one click. Annual plans are refundable within the first 14 days.
Start with one question. Stay for the reps that get you hired.
Start nowAn AI interviewer that asks, listens, and drills into your gaps. It scores every answer and asks a follow-up on each gap it finds, so you practice what you are actually weak on.
Every lab spins up a live, disposable Postgres just for you. Run real queries, break things, and get it back clean on the next attempt.
Prep paths for 10 certifications: AWS SAA, AWS DevOps Pro, Azure AZ-104, Azure AZ-400, GCP ACE, Terraform Associate, CKA, CKAD, CKS, and Claude Code. Each path knows what you have mastered and what to review next.
The questions you miss come back on a schedule that makes them stick. 800+ reviewed questions, graded, not just flipped like flashcards.
Example output, not a measured run. Your timings depend on the plan Postgres picks.