Node.js is a powerful JavaScript runtime environment built on Chrome's V8 engine. It is a versatile tool that allows for the creation of efficient server-side applications and development tools. Node.js utilizes a non-blocking I/O event model and a single-threaded event loop, offering developers efficient solutions for building fast, scalable backend applications and handling a large number of concurrent connections.
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const fs = require('fs');
fs.readFile('file.txt', 'utf8', function(err, data) {
if (err) throw err;
console.log(data);
});
process.nextTick(() => {
console.log('Invocation from process.nextTick() method');
});
console.log('First instruction');
setImmediate(() => {
console.log('Invocation from setImmediate() method');
});
console.log('First instruction');
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