# 12 OOP Concepts EVERY Developer Should Know

DevFeed: [12 OOP Concepts EVERY Developer Should Know](<https://devfeed.tech/articles/12-oop-concepts-every-developer-should-know-33559.md>)

Original publisher: [Read original article](<https://blog.algomaster.io/p/12-oop-concepts-every-developer-should-know>)

Author: Ashish Pratap Singh

Published: 2026-02-12T04:27:26Z

Content type: tutorial

Language: en

Sources: [AlgoMaster Newsletter](<https://devfeed.tech/sources/algomaster-newsletter.md>)

Topics: [Object-oriented programming (OOP)](<https://devfeed.tech/topics/oop.md>), [Programming](<https://devfeed.tech/topics/programming.md>), [Code](<https://devfeed.tech/topics/code.md>), [interfaces](<https://devfeed.tech/topics/interfaces.md>), [Polymorphism](<https://devfeed.tech/topics/polymorphism.md>), [App](<https://devfeed.tech/topics/app.md>)

Tags: [class](<https://devfeed.tech/tags/class.md>), [classes](<https://devfeed.tech/tags/classes.md>), [code](<https://devfeed.tech/tags/code.md>), [concepts](<https://devfeed.tech/tags/concepts.md>), [developer](<https://devfeed.tech/tags/developer.md>), [interface](<https://devfeed.tech/tags/interface.md>), [interfaces](<https://devfeed.tech/tags/interfaces.md>), [object-oriented](<https://devfeed.tech/tags/object-oriented.md>), [oop](<https://devfeed.tech/tags/oop.md>), [practical](<https://devfeed.tech/tags/practical.md>), [programming](<https://devfeed.tech/tags/programming.md>), [real-world](<https://devfeed.tech/tags/real-world.md>)

## AI overview

An introductory tutorial on object-oriented programming explains how classes, objects, and interfaces organize state and behavior. It uses real-world examples such as users, orders, payments, and payment gateways, and notes that these concepts are relevant to low-level design interviews.

## Source excerpt

Key Object-Oriented Programming Concepts