JavaScript
Core JS concepts, ES6+, async patterns
ClosuresPromisesEvent Loop+7 more
TypeScript
Types, interfaces, generics, utility types
Type AnnotationsInterfaces vs TypesGenerics+7 more
React
Hooks, state management, lifecycle, performance
HooksVirtual DOMState Management+7 more
Angular
Components, services, RxJS, DI
ComponentsServicesDependency Injection+7 more
Node.js
Event loop, streams, modules, Express
Event LoopStreamsBuffers+7 more
Next.js
SSR, SSG, App Router, API Routes
App RouterServer ComponentsSSR vs SSG+7 more
NestJS
Modules, controllers, providers, guards
ModulesControllersProviders+7 more
Java
OOP, collections, multithreading, JVM
OOP ConceptsCollections FrameworkMultithreading+7 more
Docker
Containers, images, compose, networking
Containers vs VMsDockerfileDocker Compose+7 more
PostgreSQL
Queries, joins, indexes, transactions
SQL QueriesJoinsIndexes+7 more
MongoDB
Aggregation, indexing, schema design
Document ModelAggregation PipelineIndexing Strategies+7 more
System Design
Scalability, caching, load balancing
ScalabilityLoad BalancingCaching Strategies+7 more