"Why Did CPU Spike?" System Design Q&A

A scenario-based system design interview prep guide built for senior full-stack, cloud, and architecture roles — the kind of real production questions interviewers actually ask ("Why did CPU jump to 95% after deployment?") instead of textbook definitions.

What's inside:

1. 118 scenario-based questions across 12 real-world categories: Microservices Architecture, API Gateway & Networking, Authentication & Security, Kubernetes & Container Orchestration, CI/CD & Deployment, Observability/Logging/Monitoring, Scalability & Rate Limiting, Database & Caching, Event-Driven Architecture & Messaging, Disaster Recovery & Multi-Region, Cost Optimization, and Production Incident Response & Debugging
2. Full framework-style answers for every question — structured so you can speak them out loud in an interview, not just read them
3. Real production scenarios, not definitions — cascading failures, hot partitions, poison messages, region failovers, CPU spikes with no code changes, and more
4. A Concept Cheat Sheet covering resilience patterns, architecture patterns, deployment strategies, security essentials, scalability concepts, observability pillars, Kubernetes fundamentals, and cost/reliability tradeoffs — built for a fast morning-of-interview review

Ideal for engineers targeting senior full-stack, backend, cloud, DevOps, SRE, or system architect roles where interviewers probe real operational judgment, not memorized theory.