Infosys Certified Node Developer

Find the output of the below code if the file 'app.js' is executed.

file1.js:  

exports.a = "John"; 

file2.js: 

var a = require('./file1'); 
a.a = "Jack"; 

app.js: 

var a = new require('./file1'); 
var b = require('./file2'); 
console.log(a.a); 

Consider the code below.

calculator.js 

exports.add=function (num1,num2){ 
       return num1+num2; 
} 
exports.sub=function (num1,num2){ 
        return num1-num2; 
} 

TestCalculator.js 

var cal=require("./calculator"); 

Which of the below statements is  true with respect to the code in TestCalculator.js file?

What type of applications are not very well suitable to implement using Node.js?

Maria wants to create server in node. She is facing issue with below code at two places X and Y. Please help her with X and Y

let h = require('http') 
let myserver = X.createServer((req,res)=>{ 
  res.write("Hello World"); res.end(); 
}) 
Y.listen(3000,()=>{
  console.log("Server started at port 3000")
})

What will be the console output of below Node.js code snippet, after running it and tried to access the url "http://localhost:3000/" from browser?

var http=require('http'); 
var server=http.createServer(function (request, response) {  
   console.log("Request Received");  
   response.end(); 
    });  
server.listen(3000);  
console.log("Server Running"); 

Consider the code snippet below in an Express server.

app.get('/', function(req, res) { 
  res.send(404); 
}); 

What will be the response from server on accessing the path "/"?

John wants to run below demo.js file using 'node demo.js' in node environment. Please select the correct output for the below code.

demo.js 

console.log("Tom"); document.write("Mary");