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To efficiently execute several CPU-intensive tasks simultaneously in Node.js without blocking the main thread, which strategy best utilizes child processes?

hard📝 Conceptual Q8 of 15
Node.js - Child Processes
To efficiently execute several CPU-intensive tasks simultaneously in Node.js without blocking the main thread, which strategy best utilizes child processes?
ARun all tasks in the main thread using asynchronous callbacks
BUse a single child process to sequentially process all tasks
CSpawn multiple child processes, each handling a separate task concurrently
DUse synchronous file system operations in the main thread
Step-by-Step Solution
Solution:

  1. Step 1: Understand Node.js single-threaded nature

    The main thread cannot handle multiple CPU-heavy tasks simultaneously without blocking.

  2. Step 2: Role of child processes

    Spawning multiple child processes allows parallel execution of CPU-intensive tasks.

  3. Step 3: Evaluate other options

    Sequential processing or running tasks in the main thread blocks event loop; synchronous operations block the main thread.

  4. Final Answer:

    Spawn multiple child processes, each handling a separate task concurrently -> Option C

  5. Quick Check:

    Parallelize CPU tasks with multiple child processes [OK]
Quick Trick: Use multiple child processes for parallel CPU tasks [OK]
Common Mistakes:
  • Using a single child process for all tasks sequentially
  • Running CPU-heavy tasks in main thread asynchronously
  • Using synchronous operations in main thread

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