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What is the main reason to listen for the 'error' event when using Node.js child processes?

easy📝 Conceptual Q11 of 15
Node.js - Child Processes
What is the main reason to listen for the 'error' event when using Node.js child processes?
ATo catch errors that happen when starting or running the child process
BTo get the output data from the child process
CTo close the child process manually
DTo restart the child process automatically
Step-by-Step Solution
Solution:

  1. Step 1: Understand the purpose of the 'error' event

    The 'error' event is triggered if the child process fails to start or encounters a problem during execution.

  2. Step 2: Differentiate from other events

    The 'exit' event tells when the process ends, but 'error' specifically catches startup or runtime errors.

  3. Final Answer:

    To catch errors that happen when starting or running the child process -> Option A

  4. Quick Check:

    'error' event = catch process startup/runtime errors [OK]
Quick Trick: Remember: 'error' means process failed to start or crashed [OK]
Common Mistakes:
  • Confusing 'error' with 'exit' event
  • Thinking 'error' gives output data
  • Assuming 'error' restarts the process

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