Final answer:
Node.js uses a single-threaded event loop architecture to handle child threads and provides a module called child_process for creating and communicating with child processes.
Step-by-step explanation:
Node.js uses a single-threaded event loop architecture to handle child threads. This means that it runs all operations on a single thread, but it can handle concurrent requests efficiently by using asynchronous I/O operations.
When a child thread is created in Node.js, it is managed by the underlying operating system. Node.js provides a module called child_process that allows you to create and communicate with child processes.
By using child processes in Node.js, you can take advantage of multi-core systems and parallelize your code, making your applications more efficient.