Chapter 5 : JavaScript Objects & Arrays

How many values or properties can an Object contain

• One value/properties

• Two values/properties

• Multiple values/properties

Identify the name of the object in the following code:

var car = { model: "EXPLORER", brand: "Ford", IntroductionYear: 2019 }

• car

• "EXPLORER"

• model

• var

Identify a key in the following code:

var car = { model: "EXPLORER", brand: "Ford", IntroductionYear: 2019 }

• car

• "EXPLORER"

• model

• var

Identify a value in the following code:

var car = { model: "EXPLORER", brand: "Ford", IntroductionYear: 2019 }

• car

• "EXPLORER"

• model

• var

How would you access the value "Ford"

var car = { model: "EXPLORER", brand: "Ford", IntroductionYear: 2019 }

• car.Ford;

• car["brand"];

• car.getbrand;

• car.brand;

What is DRIVE in the code below?

var car = {

DRIVE: function()

alert("Drive");

}

• A property

• A method

• A variable

• A function

What is the code that allows you to make use DRIVE?

var car = {

DRIVE: function()

alert("Drive");

}

• drive()

• DRIVE()

• car.drive()

• car.DRIVE()

What does the following code do?

var car = { model: "EXPLORER", brand: "Ford", IntroductionYear: 2019 }

var text = "";

for (var x in car) {

text += car[x] + " ";

}

• Displays all the code in the object

• Displays all the values in the object

• Displays all the names of the keys in the object

Which of these creates an array in Javascript named myNumber that contains the following numbers:

5, 7, 11, 23, 1

Use the var keyword to create variables

(a)  

Which will retrieve the "Singapore" from the following array?

var countries = ["Thailand", "Myanmar", "Malaysia", "Singapore", "Indonesia"]

• countries[3]

• countries[2]

• countries[0]

• countries[1]

• countries[4]