Node.js is a JavaScript runtime built on Chrome's V8 engine that allows you to run JavaScript on the server-side, enabling development of scalable network applications.

npm (Node Package Manager) is the default package manager for Node.js, allowing developers to install, manage, and publish JavaScript packages and dependencies.

What is middleware in Express?

Middleware functions in Express are functions that have access to request and response objects, can modify them, end the request-response cycle, or pass control to next middleware.

Node.js Interview Questions

311. How would you optimize CI/CD pipelines for massive Node.js monorepos?

312. What advanced distributed-build caching strategies improve backend delivery speed?

313. How do platform teams coordinate deployments across hundreds of Node.js services?

314. How would you design preview environments for distributed backend systems?

315. What rollback strategies work best for distributed Node.js outages?

316. How do stale configurations create cascading production failures?

317. How would you globally invalidate broken API configurations safely?

318. What observability platforms are essential for Node.js ecosystems?

319. How would you correlate distributed traces across Node.js microservices?

320. What runtime metrics are most valuable for diagnosing backend instability?