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

31. How would you process very large files in Node.js?

32. What is piping in streams?

33. How does error handling work in streams?

34. What are buffers in Node.js?

35. How do buffers differ from strings?

36. What are TypedArrays and ArrayBuffers?

37. How does memory management work in Node.js?

38. How does garbage collection work in V8?

39. What are memory leaks in Node.js applications?

40. How would you debug memory leaks in Node.js?