Core Concepts
2 postsPrinciples that are always true
Notes
- Database Indexing B-tree, LSM, hash, geospatial, inverted — which index to reach for, why, and the trade-offs an interviewer expects you to name. With SQL and production examples.
- Networking Essentials Networking for system-design interviews: layers, TCP/UDP, HTTP versions, REST vs gRPC, WebSocket/SSE, load balancing, CDN, and resilience. Diagrams + Go code.