Role preparation
Node.js Developer interview questions and answers.
Node.js runtime, asynchronous I/O, and resilient APIs.
Questions
Technical questions to practise out loud
- 01
How does the Node.js event loop work?
Show practical understanding of event-loop phases, non-blocking I/O, and CPU work.
Read the full breakdown - 02
How do you handle backpressure in Node.js streams?
Show practical understanding of flow control, buffering, memory use, and throughput.
Read the full breakdown - 03
How do you handle errors in Node.js async code?
Show practical understanding of promise rejection, error boundaries, and operational visibility.
Read the full breakdown - 04
When do you use Node.js worker threads?
Show practical understanding of when do you use node.js worker threads?.
Read the full breakdown - 05
When would you use Node.js clustering?
Show practical understanding of when would you use node.js clustering?.
Read the full breakdown - 06
How do you investigate a Node.js memory leak?
Show practical understanding of how do you investigate a node.js memory leak?.
Read the full breakdown - 07
How do you secure a Node.js API?
Show practical understanding of how do you secure a node.js api?.
Read the full breakdown - 08
What is your Node.js testing strategy?
Show practical understanding of what is your node.js testing strategy?.
Read the full breakdown - 09
How do you design logging for Node.js?
Show practical understanding of how do you design logging for node.js?.
Read the full breakdown - 10
How do you deploy a Node.js service safely?
Show practical understanding of how do you deploy a node.js service safely?.
Read the full breakdown