🧠 The Ultimate System Design Interview Cheatsheet System design interviews can feel overwhelming — there's a mountain of concepts, and you never know which ones will come up. I put together a visual cheatsheet that covers the most essential topics , organized so you can see the big picture at a glance. 👇 Here's a topic-by-topic breakdown of everything on it. 🚀 1️⃣ Non-Functional Characteristics Before designing anything, clarify the -ilities : availability, scalability, reliability, maintainability, latency, throughput, and consistency. These drive every architectural decision you'll make. 🎯 💡 Interview tip: Always ask about expected scale (QPS, data size, latency SLAs) before diving into a design.…