When asked about OOPs concepts, explain the four key principles: Encapsulation, Abstraction, Inheritance, and Polymorphism using examples. For DBMS, cover topics like Normalization, ACID properties, Joins, and Indexes with practical use cases from your project. In React, focus on the basics like Components, JSX, State, and Props. When discussing your project (e.g., Shop-Easy), explain its core features, technologies used (React, FastAPI, MongoDB), and how OOPs and DBMS principles were applied in real-world scenarios.