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

91. How does Redis integrate with Node.js?

92. What are rate-limiting strategies for APIs?

93. How do logging systems work in Node.js applications?

94. What are structured logs?

95. How would you monitor Node.js applications in production?

96. What are common Node.js deployment strategies?

97. How does Docker work with Node.js applications?

98. What are common Node.js testing strategies?

99. How do unit, integration, and end-to-end tests differ in backend systems?

100. How would you architect a scalable Node.js backend for a growing engineering organization?