Answer
Monitoring tools like PM2, New Relic, Datadog, or Prometheus track CPU, memory, errors, and endpoint performance.
Quick Answer
Monitor Node.js apps with: process metrics (CPU, memory heap usage via process.memoryUsage()), event loop lag, HTTP request rates and error rates, database query times. Use APM tools (Datadog, New Relic, Dynatrace) for automatic instrumentation, or Prometheus + Grafana for open-source monitoring. Set alerts on error rate spikes and latency percentiles.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ