---
title: "Discussion on \"Exploring System Design: Day 3\" | Hashnode"
description: "Discussion on \"Exploring System Design: Day 3\". Learn Inheritance & Polymorphism in C++ using real-world analogies like cars and human actions. Includes simple code and beginner-friendly concepts."
url: "https://hashnode.com/posts/exploring-system-design-day-3/6824d367c8aab450d14e438b"
---

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# [Exploring System Design: Day 3](https://aparnathakur.hashnode.dev/exploring-system-design-day-3?utm_source=hashnode&utm_medium=feed)

Learn Inheritance & Polymorphism in C++ using real-world analogies like cars and human actions. Includes simple code and beginner-friendly concepts.

May 14, 2025 · 6 min read · aparnathakur.hashnode.dev  
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-   [#system-design](https://hashnode.com/tag/system-design)
-   [#low-level-design](https://hashnode.com/tag/low-level-design)
-   [#8weekslldchallenge](https://hashnode.com/tag/8weekslldchallenge)
-   [#inheritance](https://hashnode.com/tag/inheritance)
-   [#polymorphism](https://hashnode.com/tag/polymorphism)
-   [#method-overriding](https://hashnode.com/tag/method-overriding)
-   [#method-overloading](https://hashnode.com/tag/method-overloading)

## Written by

[Aparna Singh](https://hashnode.com/@aparnasingh)

@aparnasingh · India

  
[View profile](https://hashnode.com/@aparnasingh)

Exploring OOP, Web Dev & System Design, DSA

Full-stack web developer, Passionate about building smart solutions & solving real-world problems. Love exploring EdTech, AI, and smart city innovations. Documenting my dev journey through blogs & code snippets. Aiming to become a confident tech leader & open-source contributor.

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