System Design Interview Prep
Test & Track Your Readiness

Core concepts: client-server model, HTTP, APIs, and system components

SQL vs NoSQL, indexing, replication, sharding strategies

Cache patterns, eviction policies, Redis, CDN caching

Load balancing algorithms, reverse proxies, horizontal scaling

Async communication, Kafka, RabbitMQ, event-driven architecture

Service decomposition, inter-service communication, API gateways

Scaling patterns, back-of-envelope estimation, capacity planning

Fault tolerance, circuit breakers, rate limiting, disaster recovery

REST best practices, versioning, rate limiting, auth patterns, GraphQL, gRPC

CDN architecture, DNS, HTTP/2, QUIC, TLS, anycast, cache strategies

Authentication, authorization, OAuth, JWT, common attacks and defenses

CAP theorem, consensus, consistency models, distributed coordination

Batch vs stream processing, Kafka, Spark, data pipelines, feature stores

Inverted index, Elasticsearch, relevance ranking, vector search, autocomplete

Metrics, logs, traces, SLOs, alerting, distributed tracing, OpenTelemetry

Real-world system design walkthroughs: URL shortener, Twitter, WhatsApp, Instagram, and more