Writing code is easy. Understanding the project you are building is what makes you an engineer.

Welcome to Episode 3 of AI Mobile Engineer 2026. In this video, we open our React Native + Expo project and understand the important files and folders, answer practical interview questions, modify App.tsx, and run our app on a real physical device using Expo Go.

IN THIS VIDEO YOU'LL LEARN:
Complete React Native + Expo folder structure
What the assets folder is used for
What node_modules contains
What App.tsx does
Why package.json is so important
package.json vs package-lock.json
What app.json does
What index.ts does
What tsconfig.json does
What a React Native component is
How to modify App.tsx
How the app runs and updates during development
How to run an Expo app on a physical phone using Expo Go
Important React Native interview questions

INTERVIEW QUESTIONS COVERED:
* Why is package.json important?
* What is the difference between package.json and package-lock.json?
* What is a component in React Native?
* What is App.tsx?
* What is node_modules?
* What is Expo Go?

AI MOBILE ENGINEER MINDSET
Don't just memorize the folder structure.

When AI creates a React Native project for you, you should know what every important file does, why it exists, and where to make changes.

Understand the code. Debug the code. Then ship the app.

Subscribe to The Techzeen and become a Champion in AI Mobile App Engineering. Build production-ready Android & iOS apps, master AI-powered development, and turn your skills into a real career.

Let's build. Let's ship. Let's debug AI.

Website
https://www.thetechzeen.com/

AI MOB ENGINEER Source Code:
https://github.com/farzeen-ali/AI-React-Native-Expo-App

AI Mobile Engineer 2026 Playlist
https://www.youtube.com/playlist?list=PLIKgFOVIOd1Y

AI Mobile Engineer WhatsApp Community
https://whatsapp.com/channel/0029VbDmJP617Emr7OAPtp1H

GitHub Source Code & Lecture Files
https://github.com/farzeen-ali/AI-Mob-Engineer-Concepts

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