Chapter 7

Question 1

T/F You can use the Math object directly in your programs without instantiating a new object

Answer 1

true

Question 2

The code new Date() creates an empty Date object

Answer 2

false

Question 3

You can create an empty object by assigning a pair of empty braces to a variable name

Answer 3

true

Question 4

The value of an object property can be another object

Answer 4

true

Question 5

The code for a method must be stored in an external function

Answer 5

false

Question 6

Objects are also called BLANK

Answer 6

components

Question 7

The term BLANK refers to information contained within variables or other types of storage structures

Answer 7

data

Question 8

The code (method and statements) and data (variables and constants) contained in an encapsulated object are accessed through a(n) BLANK

Answer 8

interface

Question 9

A(n) BLANK is an object that has been created from an existing class

Answer 9

instance?

Question 10

BLANK refers to cleaning up, or reclaiming, memory that is reserved by a program

Answer 10

???

Question 11

The BLANK class contains methods and properties for manipulating the date and time

Answer 11

Time ??

Question 12

The BLANK class contains methods for manipulating numbers and properties that contain static values representing some of the numeric limitations in the JavaScript language

Answer 12

Number ??

Question 13

The BLANK class contains methods and properties for mathematical calculation in your programs

Answer 13

Math

Question 14

A(n) BLANK function is a function that is used as the basis for a custom object

Answer 14

constructor

Question 15

To execute the same statement or command block for all the properties within a custom object, you can use the BLANK statemetn

Answer 15

???

Question 16

A(n) BLANK array is an array whose elements are referred to with an alphanumeric key instead of an index number

Answer 16

???

Question 17

To delete a specific property in a custom object, you use the BLANK operator

Answer 17

remove

Question 18

You can create a function that will be used as an object method by referring to any object properties it contains with the BLANK reference

Answer 18

this ??

Question 19

The BLANK property is a built-in property that specifies the constructor from which an object was instantiated

Answer 19

prototype ??

Question 20

When working with a date, JavaScript stores the month as a BLANK

Answer 20

value from 0-11 ??/

Question 21

The BLANK class requires you to use a constructor

Answer 21

Array ?

Question 22

Which Number class method can you use to convert a number to a string that is formatted with local numeric formatting style?

Answer 22

toString() ???

Question 23

Which method of the Math object rounds a value to the next lowest integer?

Answer 23

???

Question 24

When creating an object using a literal, you separate multiple property-value pairs with BLANK

Answer 24

commas ??

Question 25

To add a property to a constructor function, you must add a statement to the function body that uses the BLANK keyword

Answer 25

property ???

Question 26

BLANK refers to the creation of reusable software objects that can be easily incorporated into multiple programs

Answer 26

Object-oriented Programming

Question 27

The principle of BLANK states that any methods and properties that other programmers do not need to access or know about should be hidden

Answer 27

information hiding

Question 28

A particular instance of an object BLANK its methods and properties from a class–that is, it takes on the characteristics of the class on which it is based

Answer 28

inherits

Question 29

You can append the name of any Number class method or property to the name of an existing variable that contains a(n) BLANK value

Answer 29

numeric?????

Question 30

You can create an empty object by assigning a pair of empty BLANK to a variable name

Answer 30

curly braces