It seems that your browser is not supported by our application.

Challenge 1: Square Numbers and Return their Sum

Solution Review: Square Numbers and Return their Sum

Challenge 2: Calling a Constructor from a Constructor

Solution Review: Calling a Constructor from a Constructor

Challenge 3: Analyzing the Performance of Students

Solution Review: Calculate the Student's Total Marks

Challenge 4: Implement a Calculator Class

Solution Review: Implement a Calculator Class

Data Hiding

8 Lessons

Work through the principles of data hiding through encapsulation, practical challenges, and implementations.

What Is Data Hiding?

Encapsulation

Understanding Encapsulation Using Examples

Challenge 1: Implement the Rectangle Class

Solution Review: Implement the Rectangle Class

Challenge 2: Implement the Complete Student Class

Solution Review: Implement the Complete Student Class

Inheritance

10 Lessons

Enhance your skills in inheritance, syntax, base keyword, types, advantages, and practical challenges.

What is Inheritance?

The Syntax and Terminologies

Base Keyword

Types of Inheritance

Advantages of Inheritance

Challenge 1: Implement the Derived Class

Solution Review: Implement the Derived Class

Challenge 2: Implement the Parametrized Constructor

Solution Review: Implement the Parametrized Constructor

Polymorphism

11 Lessons

Deepen your knowledge of polymorphism in C# through inheritance, method overriding, and practical challenges.

What Is Polymorphism?

Polymorphism Using Inheritance

Method Overriding

Difference Between Overloading and Overriding

Challenge 1: Override a Method in the Derived Class

Solution Review: Override a Method in the Derived Class

Challenge 2: Implement and Override a Method

Solution Review: Implement and Override the Method

Challenge 3: Implement a Banking Application Using Polymorphism

Solution Review: Implement Banking Application Using Polymorphism

Abstract Classes and Interfaces

9 Lessons

Focus on abstraction concepts in C# using abstract classes and interfaces for flexible, modular design.

What Is Abstraction?

Abstract Classes and Methods

Interfaces

Multiple Inheritance

Challenge 1: Implement an Abstract Method in a Base Class

Solution Review: Implement an Abstract Method in a Base Class

Challenge 2: Implement an Interface

Solution Review: Implement an Interface

Composition, Aggregation and Association

6 Lessons

Practice using composition, aggregation, and association in class relationships through a console-based project.

Console-based Project

Conclusion

Certificate of Completion

Showcase your accomplishment by sharing your certificate of completion.

Developed by MAANG Engineers

Every Educative resource is designed by our in-house team of ex-MAANG software engineers and PhD computer science educators — subject matter experts who’ve shipped production code at scale and taught the theory behind it. The goal is to get you hands-on with the skills you need to stay ahead in today's constantly evolving tech landscape. No videos, no fluff — just interactive, project-based learning with personalized feedback that adapts to your goals and experience.

Looks a bit advance? Start here.

Course

Developing Applications with ASP.NET Core

Explore ASP.NET Core by delving into MVC design, JSON web APIs, repository patterns, and adding authentication. Gain insights to confidently develop full-stack or backend applications.

20 h

intermediate

Course

Introduction to Master Pages in ASP.NET

40 m

beginner

Course

Advanced Programming Techniques in D

Gain insights into lifetimes, structs, function overloading, and inheritance. Delve into templates, pointers, memory management. Discover advanced D concepts to elevate your programming skills.

30 h

intermediate

Course

Developing Web Applications with Dart

Gain insights into Dart's object-oriented features, explore extensions, enums, mixins, and asynchronous programming. Discover hands-on code practice to confidently apply Dart in your projects.

3 h 30 m

intermediate

Developing Applications with ASP.NET Core

20 hour

Introduction to Master Pages in ASP.NET

beginner

40 min

Advanced Programming Techniques in D

30 hour

Developing Web Applications with Dart

3 hour 30 min

Trusted by 2.6 million developers working at companies

"These are high-quality courses. Trust me. I own around 10 and the price is worth it for the content quality. EducativeInc came at the right time in my career. I'm understanding topics better than with any book or online video tutorial I've done. Truly made for developers. Thanks"

Anthony Walker

@_webarchitect_

"Just finished my first full #ML course: Machine learning for Software Engineers from Educative, Inc. ... Highly recommend!"

Evan Dunbar

ML Engineer

"You guys are the gold standard of crash-courses... Narrow enough that it doesn't need years of study or a full blown book to get the gist, but broad enough that an afternoon of Googling doesn't cut it."

Carlos Matias La Borde

Software Developer

"I spend my days and nights on Educative. It is indispensable. It is such a unique and reader-friendly site"

Souvik Kundu

Front-end Developer

"Your courses are simply awesome, the depth they go into and the breadth of coverage is so good that I don't have to refer to 10 different websites looking for interview topics and content."

Vinay Krishnaiah

Software Developer

"I've tried probably 5-7 different sites and Educative is easily the best. It perfectly blends explanation with interactivity"

Eric Downs

Musician/Entrepeneur

Hands-on Learning Powered by AI

See how Educative uses AI to make your learning more immersive than ever before.

Instant Code Feedback

Evaluate and debug your code with the click of a button. Get real-time feedback on test cases, including time and space complexity of your solutions.

AI-Powered Mock Interviews

Put your skills to the test in a simulated interview setting. Receive personalized feedback based on your performance. Available in Premium & Premium Plus plans.

Adaptive Learning

At various checkpoints throughout Educative courses, you will be prompted to take a quick assessment. Receive a condensed curriculum tailored to your strengths and skill gaps.

Explain with AI

Select any text within any Educative course, and get an instant explanation — without ever leaving your browser.

AI Code Mentor

AI Code Mentor helps you quickly identify errors in your code, learn from your mistakes, and nudge you in the right direction — just like a 1:1 tutor!

Course

Learn Object-Oriented Programming in Java

Explore the fundamentals of OOP in Java. Gain insights into inheritance, polymorphism, and more to write clean, modular, reusable code through interactive exercises and practical challenges.

6 h

intermediate

Course

Learn Object-Oriented Programming in Python

Gain insights into writing cleaner, modular, and scalable Python code through Object-Oriented Programming. Dive into inheritance, polymorphism, and more with coding challenges and illustrations.

6 h

intermediate

Course

Learn Object-Oriented Programming in C++

Delve into Object-Oriented Programming in C++ and discover key concepts like classes, objects, inheritance, and polymorphism to create efficient, reusable, and secure code through hands-on challenges.

6 h

intermediate

Course

Learn Object-Oriented Programming in JavaScript

Gain insights into writing cleaner, modular, scalable JavaScript code through OOP. Explore basics to advanced concepts like prototypal inheritance, method overriding, and ES6 features.

3 h

intermediate

Learn Object-Oriented Programming in Java

6 hour

Learn Object-Oriented Programming in Python

6 hour