Preparing for developer interviews in 2026? Object-Oriented Programming (OOP) remains one of the most critical foundational skills. In this post, I'll explain the four pillars — Encapsulation, Inheritance, Abstraction, and Polymorphism — tailored to the latest 2025 trends. Based on my experience, I will share vivid interview questions and effective response strategies. Prepare to allure interviewers with a deep understanding that goes further simple memorization! Table of Contents 1. The Status of OOP in 2025 Development Trends 2. Encapsulation: Information Hiding and Protection 3. Inheritance: Code Reuse and Extension 4. Abstraction: Hiding Complexity 5. Polymorphism: Flexible and Scalable Design 6. Core Summary 7. Frequently Asked Questions (FAQ) 8. Ending: Real Contemplation is Real Skill! The Status of OOP in 2025 Development Trends Development trends evolve fleetly. Microservices Architecture (MSA), Cloud Native, and Functional Programming are presently "hot potatoes....