Node.js

Node.js for Absolute Beginners

Learn server-side JavaScript basics, modules, APIs, environment variables, and backend thinking.

This is one technology path. Learn React, Next.js, Node.js, JavaScript basics, and future tracks separately at your own pace.

Interview questions

coverage.map

Topics this track covers

runtime and V8event loopmodulesnpmfilesystembuffersstreamseventsHTTPasync workerrorstestingprocess and environmentsecurityAPI designdatabasesworkersobservabilitydeployment

Node.js Foundations

Understand what Node.js is and how server-side JavaScript differs from browser JavaScript.

What Node.js is - 8 min
Request and response thinking - 8 min

Modules, Files, and Async Work

Organize Node programs and work with the filesystem safely.

Node modules - 8 min
Filesystem and async operations - 8 min

Building Secure APIs

Design endpoints, validate input, handle errors, and protect configuration.

API routes and status codes - 8 min
Validation, authentication, and environment variables - 8 min

Runtime, Streams, and Concurrency

Understand the Node.js mechanisms behind scalable asynchronous services.

Event loop phases and non-blocking I/O - 8 min
Buffers, streams, and backpressure - 8 min
Worker threads and process scaling - 8 min

Production Node.js Services

Connect persistence, testing, security, observability, and deployment into one backend workflow.

Database boundaries and transactions - 8 min
Testing, logging, and observability - 8 min
Deployment, graceful shutdown, and health checks - 8 min