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Lessons (11)

• Graphs: BFS & DFS

  … General graphs can have cycles , many paths and disconnected parts . Graphs are everywhere Real world Nodes Edges --- --- --- Google …

• REST vs GraphQL vs gRPC

  … Not meant for customers.  REST: resources over HTTP …

• SQL vs NoSQL Databases

  … The safe default for business data. - NoSQL: document, key-value, wide-column and graph stores, built for flexibility …

• Database Internals, Replication and Scaling

  … relational, document, key-value, wide-column, graph, time-series, search and vector stores solve different queries.

• DSA Interview Patterns Cheat Sheet

  … window / Prefix sums] B -- no C{Tree or graph?<br/ grid, network, dependencies} C -- shortest path / levels BFS …

• N+1 Queries, Loading & Pagination

  … IN batch Map children back to parents correctly GraphQL/resolvers Request-scoped DataLoader Cache only for request, not …

• I — Interface Segregation Principle

  … for their needs, instead of one giant API. - GraphQL: clients request only the fields they need. - Repository interfaces …

• DRY: Don't Repeat Yourself

  … hand in the client Generate types from OpenAPI / GraphQL schema Config values copied between files One .env / config …

• Stacks & Queues

  … level by level"] b1[A] -- b2[B] & b3[C] end You'll see this in the Graphs lesson …

• Microkernel (Plugin) Architecture

  … ad blockers, password managers) Webpack / Vite / Rollup Module graph + build pipeline Loaders and plugins (TypeScript, CSS, images) ESLint …

• Hexagonal Architecture (Ports & Adapters)

  … Port name Adapters --- --- --- Driving ForBorrowingBooks REST controller, CLI, GraphQL resolver, test Driving ForManagingCatalog Admin UI, import job Driven …