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

51. How does require differ from import?

52. What are dynamic imports?

53. What are package.json and package-lock.json used for?

54. What is semantic versioning in npm packages?

55. What are dependencies, devDependencies, and peerDependencies?

56. How does npm resolution work?

57. What are node_modules hoisting strategies?

58. What are monorepos in Node.js ecosystems?

59. How do npm, yarn, and pnpm differ?

60. What is Express.js?