Object Oriented

Front 1

Objects are made up of

Back 1

Properties and Methods

Front 2

Creating a specific copy of an object is called

Back 2

an Instance

Front 3

Related objects interact with each other using

Back 3

messages

Front 4

Messages between related objects are passed in response to

Back 4

events

Front 5

T/F
JavaScript is an Object Oriented Programming language

Back 5

True

Front 6

An object consists of:

Back 6

properties and methods

Front 7

The values associated with an object are called

Back 7

properties

Front 8

The actions that can be performed on objects are called

Back 8

methods

Front 9

in the following code:
var txt="Hello world!";
document.write(txt.toUpperCase());

toUpperCase() is called a

Back 9

method of the String object

Front 10

In the following code:
<script type="text/javascript">
var txt="Hello World!";
document.write(txt.length);
</script>

what is length

Back 10

the length property of the String object

Front 11

What is an array

Back 11

an array is a special variable that can hold more than one value, at a time

Front 12

T/F
An OOP language allows you to define your own objects and make your own variable types.

Back 12

True

Front 13

String, Date, and Array are examples of ____ objects

Back 13

built-in

Front 14

If a person is an object, what would be some properties

Back 14

name, height, weight, age, skin tone, eye color, etc.

Front 15

If a person is an object, what would be some methods

Back 15

The persons' methods could be eat(), sleep(), work(), play(), etc.

Front 16

What is the key difference between OO and procedural programming

Back 16

In OO design, the attributes and behavior are contained within a single object, whereas in procedural, or structured design, the attributes and behavior are normally separated.

Front 17

T/F When you look at a person, you see the person as an object

Back 17

True
A person has attributes, such as eye color, age, height, and so on. A person also has behaviors, such as walking, talking, breathing, and so on.

Front 18

An object is defined by two terms: ____ & ____

Back 18

attributes & behaviors

Front 19

Why is testing and debugging more complicated in a procedural language

Back 19

In procedural programming the data is separated from the procedures, and sometimes the data is global, so it is easy to modify data that is outside your scope. This means that access to data is uncontrolled and unpredictable (that is, several functions may have access to the global data). Second, because you have no control over who has access to the data, testing and debugging are much more difficult. Objects address these problems by combinging data and behavior into a nice, complete package.

Front 20

T/F
When properly designed, there is no such thing as global data in an OO model.

Back 20

True.

Front 21

In OO, integers and strings are represented by

Back 21

Attributes

Front 22

In OO, beaviors are represented by

Back 22

Methods

Front 23

In OO terminology, data is referred to as ___

Back 23

attributes

Front 24

In OO terminology, functions are referred to as ___

Back 24

methods

Front 25

Combining the data and the methods into the same entity is called

Back 25

encapsulation

Front 26

T/F
It is generall better to build small objects with specific tasks rather than build large objects that perform many

Back 26

True

Front 27

The OO counterpart of Cobol's paragraph would be

Back 27

a method

Front 28

When an object is created, we say that the objects are

Back 28

instantiated.

Front 29

This diagram is called a

Back 29

Class Diagram.

Front 30

The top box represents

Back 30

the NAME of the class, which in this case would be Airplane

Front 31

The middle box represents

Back 31

the member variables of the class

Front 32

The bottom box represents

Back 32

the methods of the class. Each one has a name, and then any parameters the method takes, and then a return type after the colon.

Front 33

When one class inherits behavior from another class, and can change that behavior if needed, that's called

Back 33

inheritance

Front 34

What does it mean when you say a Jet extends Airplane

Back 34

That means that Jet inherits all of Airplane's behavior to use for its own.

Front 35

Jet would be a ___ of Airplane

Back 35

subclass

Front 36

Airplane is a ___ of Jet

Back 36

superclass

Front 37

Can a subclass add its own variables to the ones that it inherits

Back 37

yes

Front 38

___ lets you build classes based on other classes, and avoid duplicating code

Back 38

Inheritance

Front 39

What is polymorphism

Back 39

Polymorphism is closely related to inheritance. When one class inherits from another, then polymorphism allows a subclass to stand in for the superclass.

Front 40

What's so useful about polymorphism

Back 40

You can write code that works on the superclass like Airplane, but will also work with any subclass type, like Jet or Rocket. So your code is more flexible. +

Front 41

What is Encapsulation

Back 41

Encapsulation is when you protect information in your code from being used incorrectly.

Front 42

T/F
Encapsulation is all about making all your variables private.

Back 42

False
It's about separating information from other parts of your application that shouldn't mess with that information.