OOP

Question 1

What is Encapsulation?

Answer 1

The process of storing functions (methods) with their associated data (properties) in on thing (object).

Question 2

Why use Encapsulation?

Answer 2

Makes it easier to add new functionality (properties/methods).

Makes it easier to read through what was already coded.

Made it so you were not afraid to make changes.

Question 3

What is Abstraction?

Answer 3

Hiding the details, and just showing what is essential.

Question 4

Why use Abstraction?

Answer 4

Allows for smaller more manageable pieces of code.

Helps you to split the complexity of your software project into manageable parts.

Question 5

What is Inheritance?

Answer 5

Make a class from another class for a hierarchy of classes that share a set of properties and methods.

Question 6

Why use Inheritance?

Answer 6

Eliminates a lot of redundant code. (keep code DRY).

Easier to change/add/remove functionality (properties and methods).

Easier to read/keep track of what’s going on.

Question 7

What is Polymorphism?

Answer 7

Code written to use an interface (property/method) automatically knows how to work with any number of different objects that provide the interface (property/method).

Question 8

Why use Polymorphism?

Answer 8

Provides a way to perform a single action in different forms.

Provides an ability to call the same method on different JavaScript objects.

Also, makes your code more reusable.