28 questions for “Logging & Monitoring”

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Node.js Logging & Monitoring 5

Information Technology

28 questions in 4 technologies

#	Question	Technology	Topic	Level
1	What is an APM (Application Performance Monitoring) tool, and what capabilities does it typically add beyond basic logging? Node.js › Logging & Monitoring	Node.js	Logging & Monitoring	Intermediate
2	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
3	What is log level (debug, info, warn, error), and how do you configure a logger like Pino or Winston to filter output by level per environment? Node.js › Logging & Monitoring	Node.js	Logging & Monitoring	Intermediate
4	How would you implement request correlation IDs to trace a single request's logs across multiple log lines and services? Node.js › Logging & Monitoring	Node.js	Logging & Monitoring	Intermediate
5	How would you implement distributed tracing across multiple Node.js microservices using OpenTelemetry? Node.js › Logging & Monitoring	Node.js	Logging & Monitoring	Advanced
6	What is the risk of exposing a raw error's stack trace in an API response, and how do you prevent it while still logging full details server-side? Node.js › Error Handling	Node.js	Error Handling	Intermediate
7	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
8	What is the risk of accidentally logging or exposing environment variables that contain secrets, and how do you prevent it? Node.js › Environment Variables & Configuration	Node.js	Environment Variables & Configuration	Intermediate
9	What is monkey-patching in the context of Node.js APM (Application Performance Monitoring) tools, and what are its risks? Node.js › Advanced Node.js	Node.js	Advanced Node.js	Advanced
10	What is observability (as distinct from traditional monitoring), and what are its three commonly cited pillars? Node.js › Cloud & DevOps	Node.js	Cloud & DevOps	Advanced

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