Frequently Asked Questions
DevOps Ledger is a scenario-based DevOps and SRE interview practice platform: you pick a real production incident, defend your decision in a chat against a senior-engineer AI that pushes back, and get scored against an answer key written before you started. The $39 one-time unlock gives you 12 months of full access to every challenge and the private Discord. The DevOps guides and AI skills are free.
Partly. The DevOps guides and the AI skills are free and need no account. The challenges are a one-time $39 unlock that gives you 12 months of full access to every challenge and the private Discord. You can read every challenge before you pay. There is no subscription and nothing renews. 14-day refund, no questions asked: email branko@devopsledger.com.
Every round runs a real model twice: once to argue with you and once to grade you. Instead of a watered-down free tier, every scenario and its decision are public, and the homepage shows a full sample round with its verdict.
A general chatbot makes up an answer on the spot. DevOps Ledger grades you against an answer key written before you started. The AI argues against you to expose weak reasoning, and it can only credit points that are in the answer key.
Every scenario has an answer key written before your session and reviewed by Branko Petric, a working DevOps engineer. The takeaway you see is copied word for word from that key, never generated during your session. After you defend your decision you are scored on correctness, reasoning, and how you handled pushback. The grader can only credit points in the key, and the overall score is recomputed on our server.
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. He reviews every challenge, guide, and answer key before it goes live, and they come from real production experience and real hiring decisions, not documentation screenshots.