System Design

High-level architecture and distributed systems concepts for senior-level interviews.

Topic	Key Focus
Fundamentals	Load balancing, CDN, Proxies, DNS
Scalability	Horizontal vs Vertical, Sharding, Replication
Database Design	SQL vs NoSQL choices, Partitioning, CAP theorem
Caching Strategies	Write-through, Write-back, Cache eviction, Redis
Message Queues	Kafka, RabbitMQ, Pub/Sub, Event-driven architecture
API Design	REST, GraphQL, gRPC, Pagination, Rate limiting
Microservices	Service mesh, Saga pattern, Circuit breaker
Case Studies →	URL Shortener, Chat System, and more