The Object Model

Question 1

What does Encapsulation do?

Answer 1

Hides certain processes from the rest of the code base; so that this data cannot be affected unintentionally

Question 2

The ability for different types of data to respond to a common interface

Answer 2

Polymorphism

Question 3

Through ___ , programmers can define basic classes with large reusability and smaller ___ for more detailed behaviors

Answer 3

Inheritance, subclasses

Question 4

___ are similar to classes in that they contain shared behavior

Answer 4

Modules

Question 5

(T/F) You can create an Object with a Module

Answer 5

False; only Classes can create an Object

Question 6

Modules must be ___ __ with a class using the __ method

Answer 6

mixed in, include

Question 7

State refers to…

Answer 7

the data associated to an individual object

Question 8

Behaviors are…

Answer 8

what objects are capable of doing

Question 9

Instance variables are how we keep track of ___

Answer 9

States

Question 10

The initialize method is what type of method?

Answer 10

Constructor method

Question 11

Instance variable has this symbol before its name

Answer 11

At sign (@)

Question 12

Until when does an instance variable instance exist?

Answer 12

As long as its object exists

Question 13

We allow objects to have behaviors with

Answer 13

Instance methods

Question 14

A getter method does what?

Answer 14

It allows you to access an instance variable

Question 15

A setter allows you to…

Answer 15

change the data associated with an instance variable

Question 16

The built-in Ruby way to create both the getter and setter methods

Answer 16

attr_accessor

Question 17

The built-in Ruby way to create a getter method

Answer 17

attr_reader

Question 18

The built-in Ruby way to create the getter method

Answer 18

attr_reader

Question 19

The built-in Ruby way to create the setter method

Answer 19

attr_writer

Question 20

Instead of using the instance variables directly in instance methods, use…

Answer 20

the instance getter method

Question 21

In order to specify to Ruby that you are not initializing a local variable you must…

Answer 21

precede a setter method with self