What are the features of Node.js's single-threaded nature and how does it affect its operation?

Node.js uses a single-threaded execution model, which means that all JavaScript code runs in a single thread. However, this does not mean that Node.js cannot handle multiple requests simultaneously. Thanks to non-blocking I/O and the event loop, Node.js efficiently manages asynchronous operations, allowing it to handle a large number of connections without creating new threads.

The features of single-threadedness influence it as follows:

• No blocking: If there are no blocking operations in the code, the single-threaded event loop quickly switches between tasks.
• Problems with CPU-intensive tasks: Long computations block the thread and slow down the processing of other requests.
• Simplified memory management: There is no need for complex synchronization between threads.

Example: when reading a file, Node.js does not block the main thread but continues to process other requests while the file is read asynchronously.