27 questions for “Debugging & Diagnostics”

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Node.js Debugging & Diagnostics 5 React React DevTools & Debugging 1

Information Technology

27 questions in 2 technologies

#	Question	Technology	Topic	Level
1	What is source map support, and why is it important when debugging a transpiled or bundled Node.js application (like TypeScript compiled to JavaScript)? Node.js › Debugging & Diagnostics	Node.js	Debugging & Diagnostics	Intermediate
2	How do you use the built-in 'debugger' statement together with Node's --inspect flag to set breakpoints in code? Node.js › Debugging & Diagnostics	Node.js	Debugging & Diagnostics	Beginner
3	How do you use Node's built-in heap snapshot capability to diagnose a suspected memory leak? Node.js › Debugging & Diagnostics	Node.js	Debugging & Diagnostics	Intermediate
4	What is the DEBUG environment variable convention (popularized by the 'debug' npm package), and how does it let you enable verbose logging selectively? Node.js › Debugging & Diagnostics	Node.js	Debugging & Diagnostics	Intermediate
5	How would you use the 'clinic.js' toolset (clinic doctor, clinic flame) to diagnose a Node.js performance problem? Node.js › Debugging & Diagnostics	Node.js	Debugging & Diagnostics	Advanced
6	What is React DevTools and how do you install it? React › React DevTools & Debugging	React	React DevTools & Debugging	Beginner
7	What is the util module's inspect() function used for, and how does it relate to how console.log() displays objects? Node.js › Core Node.js Modules	Node.js	Core Node.js Modules	Beginner
8	What is the difference between operational errors and programmer errors in Node.js, and why does this distinction matter? Node.js › Error Handling	Node.js	Error Handling	Beginner
9	Why is structured (JSON) logging generally preferred over plain-text console.log() statements in a production Node.js application? Node.js › Logging & Monitoring	Node.js	Logging & Monitoring	Beginner
10	What does the node:util.types module provide, and how does it differ from JavaScript's built-in typeof operator? Node.js › Core Node.js Modules	Node.js	Core Node.js Modules	Intermediate

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