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Node.js Interview Questions & Answers · IT Interview Practice
Home
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Backend
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Node.js
Backend
Node.js
Server-side JavaScript runtime: event loop, async, streams and scaling.
30
questions
updated weekly
Junior
10
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12
Senior
8
Node.js questions
12 / 30 shown
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What are streams in Node.js and when should you use them?
Middle
#Streams
#Performance
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What is the EventEmitter and how is it used?
Middle
#Events
#Nodejs
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How does Express middleware work?
Middle
#Framework
#Nodejs
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How do you handle errors in async Node code?
Middle
#Error Handling
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How do you run external processes with child_process?
Middle
#Process
#Nodejs
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›
When and how do you use worker threads?
Middle
#Performance
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›
What utilities help work with async code (promisify, AbortController)?
Middle
#Async
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How do you manage configuration and secrets in Node?
Middle
#Framework
#Nodejs
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What are npm scripts and lifecycle hooks?
Middle
#Tooling
#Nodejs
Details →
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How do you hash passwords and use the crypto module?
Middle
#Security
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What is CORS and how do you handle it in Node?
Middle
#Security
Details →
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What caching strategies improve a Node API's performance?
Middle
#Performance
Details →
