JavaScript and Node.js Online Test

Consider the following package.json for a Node.js application:

{
  "name": "skill-measure-app",
  "private": true,
  "version": "1.0.0",
  "main": "lib/main.js",
  "scripts": {
    "build": "npm run cleanup & npm run test & npm run publish",
    "cleanup": "rm -fr ./lib",
    "test": "jest",
    "publish": "npm publish lib"
  },
  "dependencies": {
     "jest": "^23.0.1",
     "custom-package": "file:../custom-package"
  }
}

Select all the correct statements.

(multiple correct answers possible)

Implement the ensure function so that it throws an error if called without arguments or the argument is undefined. Otherwise it should return the given value.

A company hosts its website and a product API on same server using the code below:

let http = require('http');

let commonResponse = function(response){
  response.writeHead(200, { "Content-Type": "text/html" });
  response.write("Request Complete");
}

let handleApi = function(req, res){
  if(req.method == 'POST'){
    commonResponse(res);
    res.end();
  }
}

let handleWeb = function(req, res){
  commonResponse(res)
  res.end();
}

http.createServer(handleApi).listen(4513);
http.createServer(handleWeb).listen(4514);

Select all the correct answers.

(multiple correct answers possible)