During the interview, I was asked questions related to both Data Structures & Algorithms (DSA) and MERN stack development. In DSA, the focus was on basic concepts like arrays, linked lists, and trees, along with time and space complexity. I also solved a coding problem and explained optimized approaches using techniques like hashing and two pointers.

On the MERN stack side, I was asked about MongoDB, Express.js, React, and Node.js, including API creation, state management using React hooks, and authentication using JWT. There were also scenario-based questions on building scalable applications and handling data flow between frontend and backend.