// 1. What is the outcome of the two alerts below?
var foo = "Hello";
(function() {
  var bar = " World";
  alert(foo + bar);  // “Alert #1"
})();
alert(foo + bar);   // “Alert #2"

//==========================================

//2. What is the difference between A and B:
function Person() {
  this.firstname = “John”;
  this.lastname = “Doe”;
};
var person = Person(); // “Situation #1"
var person = new Person(); // “Situation #2"