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

341. How do supply-chain attacks propagate through npm ecosystems?

342. How would you implement runtime security enforcement for Node.js services?

343. What are advanced sandboxing strategies for executing untrusted code in Node.js?

344. How would you isolate multi-tenant workloads safely?

345. How do Node.js applications support compliance-heavy industries?

346. What auditability requirements exist in regulated backend systems?

347. How would you implement tamper-evident audit trails in Node.js platforms?

348. How do privacy regulations affect distributed telemetry architectures?

349. How would you design consent-aware backend observability systems?

350. How do encryption-at-rest and encryption-in-transit strategies integrate with Node.js?