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

331. What bottlenecks occur in ultra-low-latency Node.js systems?

332. How do kernel-level networking constraints affect Node.js performance?

333. How would you minimize tail latency in distributed Node.js APIs?

334. How do garbage-collection pauses impact latency-sensitive workloads?

335. How would you optimize Node.js systems for high-frequency event processing?

336. What memory-allocation patterns degrade Node.js throughput under scale?

337. How do low-memory container limits affect Node.js runtime behavior?

338. How would you dynamically tune Node.js systems based on runtime telemetry?

339. What advanced security governance practices apply to Node.js ecosystems?

340. How would you ensure dependency integrity across enterprise Node.js platforms?