Syntax

Question 1

can be thought of as a template or a blueprint for a type of object.

Answer 1

class

Question 2

can include variables and constants, which hold data values, and methods, which are functions that encapsulate behavior bound to the class.

Answer 2

class definitions

Question 3

The values stored in properties can be_or other objects.

These are numbers, strings, or Boolean values.

Answer 3

primitive values

Question 4

contains a number of built-in classes that are part of the core language

Answer 4

ActionScript 3.0

Question 5

All classes, whether built-in or user-defined, derive from the _ class

Answer 5

Object

Question 6

Object data type is no longer the _ , even though all other classes still derive from it.

Answer 6

default data type

Question 7

In ActionScript 2.0, the following two lines of code were equivalent because the lack of a type annotation meant that a variable would be of type Object:

Answer 7

var someObj:Object;

var someObj;

Question 8

ActionScript 3.0, however, introduces the concept of untyped variables, which can be designated in the following two ways:

Answer 8

var someObj:*;

var someObj;

Question 9

allow you to store values that you use in your program

Answer 9

Variables

Question 10

To declare a variable, you must use the _ with the variable name.

Answer 10

var statement

Question 11

the following line of ActionScript declares a variable named i:

Answer 11

var i;

Question 12

Declaring a variable without designating the variable’s type is legal, but generates a compiler warning in _.

Answer 12

strict mode

Question 13

You designate a variable’s type by appending the variable name with a _, followed by the variable’s type

Answer 13

colon (:)

Question 14

the following code declares a variable i that is of type int:

Answer 14

var i:int;

Question 15

You can assign a value to a variable using the assignment _.

Answer 15

operator (=)

Question 16

the following code declares a variable i and assigns the value 20 to it:

Answer 16

var i:int; i = 20;
(or if more convenient)
var i:int = 20;

Question 17

The technique of assigning a value to a variable at the time it is declared is commonly used not only when assigning primitive values such as integers and strings, but also when creating an _ or instantiating an instance of a class.

Answer 17

array

Question 18

The following example shows an array that is declared and assigned a value using one line of code

Answer 18

var numArray:Array = [“zero”, “one”, “two”];

Question 19

You can create an instance of a class by using the _ operator

Answer 19

new

Question 20

The following example creates an instance of a class named Custom Class, and assigns a reference to the newly created class instance to the variable named custom Item:

Answer 20

var customItem:CustomClass = new CustomClass();

Question 21

If you have more than one variable to declare, you can declare them all on one line of code by using the _ to separate the variables

Answer 21

comma operator (,)

Question 22

the following code declares three variables on one line of code

Answer 22

var a:int, b:int, c:int;

Question 23

the following code declares three variables (a, b, and c) and assigns each a value

Answer 23

var a:int = 10, b:int = 20, c:int = 30;

Question 24

is the area of your code where the variable can be accessed by a lexical reference.

Answer 24

scope of a variable

Question 25

variable that is defined in all areas of your code; a variable that you define outside of any function or class definition.

Answer 25

global variable

Question 26

variable that is defined in only one part of your code

Answer 26

local variable

Question 27

You declare a local variable by declaring the variable inside a _ - the smallest area of code for which you can define a local variable.

Answer 27

function definition

Question 28

The primitive data types include Boolean, int, Null, Number, String, uint, and void. The ActionScript core classes also define the following complex data types: Object, Array, Date, Error, Function, RegExp, XML, and XMLList.

Answer 28

Data Type Descriptions

Question 29

data type includes two values: true and false.

Answer 29

Boolean data type

Question 30

default value of a Boolean variable that has been declared but not initialized

Answer 30

false

Question 31

stored internally as a 32-bit integer and includes the set of integers from -2,147,483,648 (-231) to 2,147,483,647 (231- 1), inclusive.

Answer 31

int data type

Question 32

Previous versions of ActionScript offered only the _, which was used for both integers and floating-point numbers

Answer 32

Number data type

Question 33

The default value for variables that are of the data type int

Answer 33

0

Question 34

This is the default value for the String data type and all classes that define complex data types, including the Object class

Answer 34

null

Question 35

can represent integers, unsigned integers, and floating-point numbers

Answer 35

Number data type

Question 36

To store a floating-point number, include a _ in the number.

Answer 36

decimal point

Question 37

This standard dictates how floating-point numbers are stored using the 64 available bits

Answer 37

IEEE Standard for Binary Floating-Point Arithmetic (IEEE-754)

Question 38

In a 64- bit, one bit is used to designate whether the number is _

Answer 38

positive or negative

Question 39

In a 64-bit, eleven bits are used for the _, which is stored as base 2

Answer 39

exponent

Question 40

In a 64-bit, the remaining 52 bits are used to store the_, which is the number that is raised to the power indicated by the exponent.

Answer 40

significand(also called themantissa)

Question 41

is stored internally as a 32-bit unsigned integer and includes the set of integers from 0 to 4,294,967,295 (2^32 - 1), inclusive

Answer 41

uint data type

Question 42

Use the uint data type for special circumstances that call for _

Answer 42

non-negative integers

Question 43

The default value for variables that are of data type uint

Answer 43

0

Question 44

The void data type contains only one value, _

Answer 44

undefined

Question 45

In previous versions of ActionScript, _ was the default value for instances of the Object class

Answer 45

undefined

Question 46

are variables that either lack any type annotation, or use the asterisk (*) symbol for type annotation

Answer 46

Untyped Variables

Question 47

The _ is defined by the Object class

Answer 47

Object data type

Question 48

serves as the base class for all class definitions in ActionScript.

Answer 48

Object Class

Question 49

The following example shows two equivalent statements, both of which declare an untyped variable x

Answer 49

var x

var x:*