What is the output in console of this code?

var events = require('events');

var myEventEmitter = new events.EventEmitter();

myEventEmitter.once('a', function () {

console.log('a')});

myEventEmitter.on('b', function () {

console.log('b')});

myEventEmitter.emit('a');

myEventEmitter.emit('b');

myEventEmitter.emit('a');

myEventEmitter.emit('b'); 

What is the output when the following code is executed? var http = require('http'); var server = http.createServer(function(req, res) { res.writeHead(200, {'Content-Type': 'text/html'}); res.end(` Testing Response! ${req.url} ${req.method} `); }); server.listen(3000); console.log('Server listening on port 3000');

Which of the following code gets length of a buffer buf?

Which of the following code converts a buffer buf to JSON object?

What output will this code produce in the console? const EventEmitter = require('events'); const myEmit = new EventEmitter(); myEmit.on('slick', () => {}); myEmit.on('key', () => {}); const symbol = Symbol('init'); myEmit.on(symbol, () => {}); console.log(myEmit.eventNames());

Consider the following javascript code. console.log('first'); setTimeout(function() { console.log('second'); }, 0); console.log('third'); What will be the output?

Which of the following provides in-built events?

Which of the libs are exists in Node Core Libraries?

Which of the following code print the name of operating system?

Which are the below NodeJS features?

Which of the following engine built of NodeJS framework/platform?