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1)Module object in nodejs to provide encapsulation? In Node.js, encapsulation can be achieved using the module system provided by CommonJS. CommonJS is a module system for JavaScript that allows you to encapsulate code into separate modules with their own scope, thereby preventing pollution of the global namespace and providing a way to organize and structure your code. Here's a basic example of how you can use CommonJS modules for encapsulation in Node.js: Create a module file (myModule.js): // myModule.js let privateVariable = 'I am private'; function privateFunction() {     console.log('This is a private function'); } module.exports = {     publicVariable: 'I am public',     publicFunction: function() {         console.log('This is a public function');         privateFunction(); // Private function can be accessed within the module     } }; 2)How to handle concurrent request in sockets? In Node.js, handli...