Answer Posted / Avinash Shahi

The Reactor Pattern is a design pattern used in Node.js to handle multiple asynchronous events efficiently and non-blockingly:n
1. Event Loop: The Reactor Pattern relies on the event loop, which continuously listens for incoming I/O events (such as HTTP requests) and triggers callbacks when they occur.n
2. Single Threaded: Despite handling multiple concurrent events, Node.js uses a single thread for processing tasks, ensuring that it remains lightweight and efficient.n
3. Event Handlers: Event handlers are functions that get called in response to specific I/O events. By using event-driven programming, developers can write clean, scalable code that responds to user interactions or system events.n
4. Asynchronous Non-Blocking I/O: Because Node.js uses the Reactor Pattern and supports asynchronous non-blocking I/O operations, it is able to handle a large number of simultaneous connections efficiently.

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