7 min read Airbnb connects 4+ million hosts with 150+ million guests across 220+ countries. Designing an accommodation platform tests your understanding of […] Read article
7 min read GitHub hosts 200+ million repositories for 100+ million developers. Designing a code hosting platform tests your understanding of distributed version […] Read article
7 min read Zoom handles 300+ million daily meeting participants with real-time audio and video. Designing a video conferencing system tests your understanding […] Read article
7 min read Pinterest is a visual discovery platform with 450+ million monthly active users who save, organize, and discover ideas through images […] Read article
7 min read Amazon processes millions of orders daily across hundreds of millions of products. Designing an e-commerce platform tests your ability to […] Read article
7 min read Google Maps serves over 1 billion monthly active users with real-time navigation, traffic data, satellite imagery, and location search. Designing […] Read article
7 min read YouTube is the second largest search engine in the world, serving over 1 billion hours of video daily to 2+ […] Read article
7 min read The sweep line technique processes events in sorted order along a dimension (typically time or position). It converts 2D problems […] Read article
7 min read Topological sort orders vertices in a directed acyclic graph (DAG) such that for every edge (u, v), u appears before […] Read article
7 min read Array and string problems are the bread and butter of coding interviews, appearing in over 40% of questions. The key […] Read article