mongod.exe --dbpath c:\data\db

var MongoClient = require('mongodb').MongoClient
  , assert = require('assert');

// Connection URL
var url = 'mongodb://localhost:27017/data';
// Use connect method to connect to the Server
MongoClient.connect(url, function(err, db) {
  assert.equal(null, err);
  console.log("Connected correctly to server");

  db.close();
});

{
 "name": "MongoDB",
 "version": "1.0.0",
 "description": "use MongoDB",
 "main": "app.js",
 "scripts": {
  "test": "echo \"Error: no test specified\" && exit 1"
 },
 "keywords": [
  "mongodb"
 ],
 "author": "starwind",
 "license": "ISC",
 "dependencies": {
  "mongodb": "^2.2.26"
 }
}

npm install

node app.js