JRDL - JS Arrays and Objects

TRUE OR FALSE:

You can store any data type in arrays.

• True

• False

Which of the following is the correct syntax for creating an array?

• { "cat", "dog, "mouse", 123, true }

• [ cat, dog, mouse, 123 }

• [ "cat"; "dog"; "mouse"; 123, true]

• [ "cat", "dog", "mouse", 123, true]

With the given array, how do I access "snickers"?

var candy = ["m & m's", "100 grand", "snickers"]

• candy[1]

• candy[3]

• candy[2]

• candy[0]

What are the two ways you can access objects?

• Dot notation and bracket notation

• Curl notation and dot notation

• Square brackets and parentheses

• Dot notation and parentheses

What is the correct syntax for adding a property to the object provided below?

var cat = {};

• cat[name] = 'felix';

• cat[name] : 'felix';

• cat.name : 'felix';

• cat.name = 'felix';

TRUE OR FALSE: You can use .length on an array to get the total count of items in the array.

• True

• False

What is the correct syntax for accessing an object using bracket notation?

Example object:

var object = {

name: 'Spot';

}

• object["name"];

• object{name};

• object("name");

• object[name];

What would the following code log on the console:

var pizza = {

topping1: "extra cheese",

topping2: "pepperoni",

topping3: "mushrooms",

size: "large"

}

console.log(pizza.topping2);

• "mushrooms"

• "large"

• "pepperoni"

• undefined

What will the following code log on the console:

var myArray = ["hello", "world", "maryknoll"];

console.log(myArray[3]);

• "hello"

• "world"

• "maryknoll"

• none of the above

TRUE OR FALSE: Objects can be accessed with value's index.

• True

• False