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You notice your Node.js app memory grows continuously. Which fix helps if the leak is caused by event listeners?

medium📝 Debug Q6 of 15
Node.js - Debugging and Profiling
You notice your Node.js app memory grows continuously. Which fix helps if the leak is caused by event listeners?
ARestart the app every minute
BAdd more event listeners to balance load
CUse synchronous code instead of async
DRemove unused event listeners with emitter.off()
Step-by-Step Solution
Solution:

  1. Step 1: Identify event listener leak fix

    Removing unused listeners frees memory and stops leaks.

  2. Step 2: Evaluate options

    Only removing listeners addresses the leak directly.

  3. Final Answer:

    Remove unused event listeners with emitter.off() -> Option D

  4. Quick Check:

    Fix event listener leaks = remove listeners [OK]
Quick Trick: Always remove listeners when no longer needed [OK]
Common Mistakes:
  • Adding more listeners worsens leaks
  • Switching sync/async doesn't fix leaks
  • Restarting app is a temporary workaround

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