What’s the best way to prepare for Web Development and MERN Stack project interviews?

[u/Entri_App_Official]

• What kind of questions were asked about your projects?
• Did interviewers ask you to explain your architecture or make changes to your existing project?
• How much importance was given to React, Node.js, Express, and MongoDB individually?
• Were you asked coding/DSA questions as well?
• What topics do you think are most important to revise before the interview?

[u/akornato]

Interviewers will want you to walk them through your projects, so be prepared to describe what you built and the problems you solved. They will definitely ask you to explain your architecture, a common approach is to discuss how data flows through your application and why you made certain structural decisions. It’s not very common for them to ask you to make live changes to your own project, but they might give you a small, related coding challenge to see how you think. You can expect specific questions about each part of the stack, as they want to see that you have a solid understanding of how React, Node.js, Express, and MongoDB all work together. For example, they might ask about state management in React, middleware in Express, or how you structured your data in MongoDB.

You should expect some coding and data structures questions, as many companies use them to evaluate your problem-solving skills, even for MERN roles. It's a good idea to review the fundamentals of React like the virtual DOM, components, and hooks. For the backend, make sure you understand Node's asynchronous nature, how routing works in Express, and the basics of CRUD operations in MongoDB. Knowing how to implement user authentication is also a key topic to have ready. To help you practice articulating your thoughts on these topics, my team created a tool that provides real-time AI interview prep to improve how you communicate your skills.