IntermediateFundamentals
Node.js Interview Track
The event loop, streams, error handling and backend patterns for server-side roles.
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Topics in recommended order
Learning path
Follow the stages top to bottom. Nothing is locked — the order is simply what works.
Fundamentals
6 questionsBeginnerFundamentals
What does non-blocking I/O mean in Node.js?
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What's the difference between CommonJS and ESM modules?
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What are streams and why do they matter?
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How do you manage configuration and secrets in a Node.js app?
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How do you scale a Node.js app? Compare cluster mode and worker_threads.
Not practiced yetPractice thisServer Patterns
4 questionsIntermediateServer Patterns
How does error handling work across callback, promise and EventEmitter APIs in Node.js?
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How does Express middleware actually work?
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What are Buffers and when do you need them over strings?
Not practiced yetPractice thisAdvancedServer Patterns