### 1. The Incident Context For 11 consecutive months, our primary production Auto Scaling Group (ASG) serving API traffic never scaled down below 40 EC2 instances (`c6i.2xlarge`) during of...
### What Changed AWS has updated cross-zone data transfer pricing for Network Load Balancers (NLB). Previously, enabling cross-zone load balancing incurred standard inter-AZ transfer charges ($0.01/G...
We kept getting feedback that our first DOP-C02 set read like it was written for the Associate exam. It was. We scrapped it and rewrote all 50 questions around actual operational failure modes. When...
Today's Spin
Spin the Roulette to roll a random Cloud Challenge to build or an Engineering Decision Record (EDR) to read and analyze.
Join Free
Create an account to verify scenarios, run automated test suites, and save completed builds to your profile.
Sign In
Welcome back! Sign in to verify solutions and view your cloud progress.
BuildRoulette started with a simple observation: there are a lot of places to learn cloud, but knowing something and being able to build, troubleshoot, and make decisions with it are two completely different things.
Built by Oyinkansola — less memorization, more doing; less “here's what this service does,” more “here's a problem, figure it out.”
Build something. Break something. Figure it out.