Which of the following provides in-built events?

Which of the following classes is the parent for repl.REPLServer class?

Which of the following variables you can use in modules?

Which of the following timers methods exists in Node.js?

Which of the following is the result of module.id ?

Which of the following should not to use in NodeJS?

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');

Which of the following is the correct way to get a normalized path? 

How can you access the command line arguments passed to your program?

Select valid stream instances:

Which of the following code print the total free memory of operating system?