Frequently Asked Questions
DevOps Ledger is a free platform for getting good at DevOps by practicing real production decisions. You make a call, defend it against a senior-engineer AI that pushes back, then get scored against a verified rubric. It also includes free DevOps guides and ready-to-use AI skills.
Yes. The challenges, the DevOps guides, and the AI skills are all free. You sign in (also free) to play challenges so your scores and progress are saved. There is no subscription, no credit card, and no paywall.
ChatGPT is built to agree with you, and it does not actually know the right answer - it generates a plausible one on the spot. Every DevOps Ledger challenge has a verified rubric written in advance. The AI argues against you to expose weak reasoning, then you are graded against the real answer, not the model's mood.
Each challenge has a ground-truth answer key written and checked by a working DevOps engineer. After you defend your decision you are scored on correctness, reasoning, and how you handled pushback, with a breakdown of what you argued well and the traps you fell into.
Yes. Real DevOps interviews test how you reason through incidents and tradeoffs, not whether you memorized definitions. Defending a decision against an AI that keeps pressing, then getting scored on it, is direct practice for system design and incident-response interview questions.
Challenges cover real incidents and design calls across Kubernetes, Docker, Terraform, AWS, CI/CD, Linux, and incident response - from a 1.6GB Docker image with 8-minute builds to a Terraform plan that wants to destroy the production database. New cases are added regularly.
No advanced experience required. If you know basic Linux and a few core tools (containers, CI/CD, a cloud) you can start. Challenges range from beginner to advanced, so they scale with you as you improve.
Ready-to-use skill files for AI tools like Claude and Cursor that automate real DevOps workflows - optimizing Docker images, debugging pipelines, triaging incidents, and more. They are provider-agnostic and free to use.
Branko Petric, a working DevOps engineer who has been on both sides of the interview table. Every challenge, guide, and rubric comes from real production experience and real hiring decisions, not documentation screenshots.