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Node.js Interview Questions

Found 399 questions

101. How does the Node.js event loop coordinate with libuv internally?

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102. What happens internally when an asynchronous filesystem operation is executed?

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103. How does Node.js schedule callbacks across event-loop phases?

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104. What are starvation problems in the Node.js event loop?

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105. How do excessive microtasks affect Node.js responsiveness?

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106. How would you diagnose event-loop lag in production?

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107. What metrics indicate unhealthy event-loop behavior?

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108. How do CPU-bound tasks degrade Node.js throughput?

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109. How would you offload CPU-intensive workloads in Node.js?

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110. What are serialization costs in worker-thread communication?

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