The Muni Memo
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Interview prep
Node.js interview questions for freshers to senior developers: modules, the event loop, streams, Express, scaling with workers and clusters, and production operations, each with a worked explanation.
Start where you are; each paper is 12 questions with a timer and a topic-by-topic report.
Fresher0–1 year
12 Node.js interview questions for freshers and students (0 to 1 year): npm scripts, require and modules, process and paths, the fs module and a basic HTTP server. Each answer explains why the other options are wrong.
Mid-level2–5 years
12 Node.js interview questions for developers with some experience (2 to 5 years): event-loop phases, streams and backpressure, Express middleware and errors, auth cookies and status codes. Each answer explains why the other options are wrong.
Senior5+ years
12 Node.js interview questions for senior and lead developers (5+ years): event-loop lag, worker threads versus cluster, memory leaks, graceful shutdown, idempotency, rate limiting and caching. Each answer explains why the other options are wrong.
Most technical rounds include a coding task. Write JavaScript or Python, run it against tests in your browser, then read a full solution.
Browse coding problemsNode.js interviews start with the event loop and non-blocking I/O, then move to streams, APIs and running services in production. Interviewers want to hear you reason about what blocks the loop and what happens under load.
process, paths, the file system and a basic HTTP server.Run every snippet with node and change one line at a time. For senior rounds, be ready to explain what you would measure first when a real service slows down.