Which of the following code snippet append an element value at the end of the array, arr?
a) arr[arr.length+1] = value
b) arr[arr.length] = value
c) arr[arr.length - 1] = value
d) arr = arr + value
Answer: C
JavaScript: what is the correct way to create a JavaScript array?
a) var items = ["Orange", "Apple"];
b) var items = {"Orange", "Apple"};
c) var items = new array("Orange", "Apple");
d) var items[] = {"Orange", "Apple"};
Answer: A
JavaScript: What is the output of the following code
foo = 1;
(function() {
foo = 2;
})();
var x = function () {
foo = 3;
};
(function() {
var foo = 4;
})();
console.log(foo);
Answer: 2