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AI Node.js interviewer
Event loop, streams and APIs — practice explaining how Node.js behaves under load.
Free 10-minute interview with a full report. Paid plans run full-length sessions.
Node.js interview questions you might get
A sample of the starting questions. The live interview follows up on your answer, so no two sessions go the same way.
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A CPU-heavy endpoint makes every other request slow. Why, and how do you fix it?
What it tests: Event loop blocking.
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How do you process a 10 GB file without running out of memory?
What it tests: Streams.
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What happens to an unhandled promise rejection?
What it tests: Error handling.
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How would you find a memory leak in a Node service?
What it tests: Production debugging.
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How do you protect an Express API from common attacks?
What it tests: Security basics.
How a session works
About 20–30 minutes from setup to report. End any time and you still get feedback on what was covered.
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Set your target
Pick a role, level and stack. Add a job description or your resume if you want questions about your real projects.
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Answer live
Speak or type. The interviewer follows up on thin answers, raises the difficulty when you're doing well and switches to code when it fits.
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Read the notes
A report scores every competency, quotes the answers that cost you, and gives you a prep plan for the next session.
A report that quotes you, not a pat on the back
Every score links back to something you actually said.
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Competency scores
Weighted to the role you picked, so a system design gap counts more for a senior backend role than for a frontend junior.
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STAR check on every story
See which part of each behavioral answer was missing — usually the Result.
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How you sounded
Filler words, hedging, "I" versus "we", and whether you cited real numbers — measured from your words, and compared between the first and second half of the interview.
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A prep plan
The two or three things to practice next, and a skill graph that tracks them across sessions.
Competencies — sample report
STAR — "Tell me about a missed deadline"
How you sounded
Questions
Express or another framework?
Express by default; name Fastify, NestJS or others in your focus.
Will I write code?
Yes, coding questions accept JavaScript or TypeScript.
Does it cover databases?
Add your database to the focus to include it.
Is it free to try?
Yes. Each month you get a free interview of up to 10 minutes with its scored report. Paid plans add full-length interviews, every track and the full 360 report.