[Interview Question] What is object-oriented programming?

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Yesterday, while interviewing for a job at a major company, I had a situation where I had to answer a question about object-oriented programming that I thought I knew and had organized, but when it came time to answer, I stumbled over it.

Thanks to this, I thought I had pointed out my weaknesses and decided to take the time to reorganize!

What is a ### object?

Let's start with a general definition

General theory: something that actually exists Computer science: Something created in memory as defined by a class.

Object-oriented languages define the following

Java: an instance of a class or an array Python: data that has a property value or behavior.

Classes in Java are not instances, but classes in Python are.

Object-oriented programming

Building interactive programs by defining the roles and relationships of objects.

We can define it like this.

Characteristics of object-oriented languages

abstraction

• Able to derive common features between objects

• The part that defines the class is

Polymorphism

• Can be called the same for functions that behave in slightly different ways

• Passing interpretation to linked objects for the same command

• Override (overriding internal sources), overload (calling another function with the same name based on parameters)

Encapsulation

• You can hide the parts of your implementation without exposing them to the outside world

• If you need to communicate with the outside world, send and receive information via methods

Inherit from ####

• The inheritance of features from one class by another class

• Allows you to create new classes in addition to those already created