suresh One frequently asked Node.js interview question is “Explain the event loop in Node.js and how it works.” The event loop in Node.js is a crucial concept for understanding how asynchronous operations are handled. In Node.js, the event loop is a single-threaded, non-blocking system that allows for efficient handling of I/O operations.
The event loop continuously monitors the Node.js runtime environment for asynchronous events and executes callback functions once these events are completed. It prioritizes time-consuming operations and delegates them to worker threads, allowing the main thread to remain responsive.
The event loop functions by processing events in a loop, checking for pending callbacks or timed events, and executing them sequentially. This ensures that asynchronous operations do not block the main thread, making Node.js highly scalable and efficient for handling a large number of simultaneous connections.
Understanding the event loop is essential for Node.js developers, as it enables them to write performant and efficient code that takes full advantage of Node.js's asynchronous nature.
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