Chapter 7

Question 1

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

Answer 1

Number

Question 2

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

Answer 2

associative

Question 3

The ____ class contains methods and properties for manipulating the date and time.

Answer 3

Date

Question 4

When working with a date, JavaScript stores the month as a ____.

Answer 4

value from 0-11

Question 5

The ____ class contains methods and properties for performing mathematical calculations in your programs.

Answer 5

Math

Question 6

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

Answer 6

prototype

Question 7

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

Answer 7

instance

Question 8

Objects are also called ____.

Answer 8

components

Question 9

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

Answer 9

this

Question 10

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

Answer 10

for/in

Question 11

The code (methods and statements) and data (variables and constants) contained in an encapsulated object are accessed through a(n) ____.

Answer 11

interface

Question 12

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

Answer 12

​toLocaleString()

Question 13

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

Answer 13

constructor

Question 14

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

Answer 14

delete

Question 15

Programming code and data that can be treated as an individual unit or component

Answer 15

object

Question 16

Type of array that enables you to add object properties incorporating numbers

Answer 16

associative

Question 17

Elements required for a source program to communicate with an object

Answer 17

interface

Question 18

A template, or blueprint, that serves as the basis for new objects

Answer 18

class

Question 19

Returns the square root of the specified value

Answer 19

sqrt()

Question 20

Converts a number to a string using the number of decimal places specified

Answer 20

toFixed()

Question 21

The easiest way to declare a custom object

Answer 21

literal

Question 22

Returns a value rounded to the nearest integer

Answer 22

round()

Question 23

Creates a Date object containing the current date

Answer 23

new Date()

Question 24

​A function assigned a name within a custom object

Answer 24

method

Question 25

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

Answer 25

this

Question 26

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

Answer 26

​floor()

Question 27

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

Answer 27

Garbage collection

Question 28

Which class requires you to use a constructor?​

Answer 28

Date

Question 29

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

Answer 29

data

Question 30

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

Answer 30

commas