React JS Interview Questions to Boost Skills L2

What’s Covered?

This question set focuses on topics that are commonly asked in technical interviews and coding assessments:

✅ JSX and Virtual DOM

✅ Functional and Class Components

✅ State and Props – Deep Dive

✅ React Hooks: useState, useEffect, useContext, and more

✅ Component Lifecycle and Side Effects

✅ Conditional Rendering and Event Handling

✅ Lifting State Up and Component Communication

✅ Forms and Controlled Components

✅ Routing using React Router

✅ Performance Optimization and Best Practices

Whether it's a product-based company, a startup, or a service firm, understanding these concepts is crucial for cracking the React round confidently.