React Interview Questions 2026 (English + Gujarati) – Easy, Practical & Human-Friendly Guide
Preparing for a React interview can feel overwhelming especially when you’re not sure what kind of questions will be asked. The truth is, most interviews don’t just test your memory… they test how well you actually understand React.
Apart from technical questions, you should also prepare answers like Tell Me About Yourself Interview Question – Complete Guide.
So instead of giving you robotic definitions, this guide explains React interview questions in a simple, human way with English + Gujarati explanations so you can truly grasp the concept. For official documentation, you can visit the React website to explore concepts in depth.
1. What is React?
Answer (English):
React is a tool (library) that helps developers build fast and interactive user interfaces. Instead of updating the whole page, React updates only what is needed — making apps faster.
Answer (Gujarati):
React એક library છે જે fast અને interactive UI બનાવવા માટે ઉપયોગી છે. આખી page reload કર્યા વગર માત્ર જરૂરી ભાગ update થાય છે.
Simple understanding: React = Faster UI + Better user experience
2. What is a Component?
Answer (English):
A component is like a small building block of your app. For example, a button, navbar, or card — all can be separate components.
Answer (Gujarati):
Component એ app નો નાનો ભાગ છે જેમ કે button, navbar, card. દરેક ભાગ અલગ બનાવીને reuse કરી શકાય છે.
Real-life example: Like LEGO blocks combine them to build anything.
3. What is JSX?
Answer (English):
JSX makes your code easier to read and write.
Answer (Gujarati):
JSX દ્વારા આપણે JavaScript અંદર HTML જેવું code લખી શકીએ છીએ, જે વાંચવા અને સમજવા સરળ બને છે.
Think like: HTML + JavaScript = JSX
4. What is State?
Answer (English):
State is data that can change over time inside a component. When state changes, the UI updates automatically.
Answer (Gujarati):
State એ data છે જે component અંદર બદલાઈ શકે છે. State બદલાય એટલે UI પણ automatically update થાય છે.
Example: Counter increasing on button click
5. What are Props?
Answer (English):
Props are used to pass data from one component (parent) to another (child).
Answer (Gujarati):
Props દ્વારા parent component થી child component માં data મોકલી શકાય છે.
Important: Props cannot be changed (read-only)
6. State vs Props (Easy Way)
English:
- State = Internal data (changeable)
- Props = External data (fixed)
Gujarati:
- State = અંદરનું data (બદલાય શકે)
- Props = બહારથી આવતું data (બદલી શકાતું નથી)
7. What is useState?
Answer (English):
useState is a one type of Hook which allow you to store data and update data on React functional components
Answer (Gujarati):
useState Hook દ્વારા આપણે functional component માં data store અને update કરી શકીએ છીએ.
Simple: It gives memory to your component
8. What is useEffect?
Answer (English):
useEffect is used when something needs to happen after rendering like API calls or updating the DOM.
Answer (Gujarati):
useEffect નો ઉપયોગ rendering પછી કામ કરવા માટે થાય છે જેમ કે API call.
If you want to understand this concept in detail, check out our complete guide on React useEffect Hook with Examples (Beginner Guide).
Example: Fetch data when page loads
9. What is Virtual DOM?
Answer (English):
React creates a copy of the real DOM (Virtual DOM) and compares changes to update only necessary parts.
Answer (Gujarati):
React પહેલા Virtual DOM માં changes કરે છે અને પછી real DOM માં માત્ર જરૂરી ભાગ update કરે છે.
Result: Better performance
To improve performance in real-world applications, you should also learn the difference between useMemo vs React.memo : React Performance Explained Simply.
10. What is Conditional Rendering?
Answer (English):
Showing different UI based on conditions.
Answer (Gujarati):
Condition પ્રમાણે અલગ UI બતાવવું.
Example: Show “Login” or “Logout” button
11. What is React Router?
Answer (English):
It helps you move between pages without reloading the whole app.
Answer (Gujarati):
React Router દ્વારા page change થાય છે પરંતુ app reload થતું નથી.
12. What is useRef?
Answer (English):
useRef is used to directly access elements or store values without re-rendering.
Answer (Gujarati):
useRef દ્વારા DOM element ને direct access કરી શકાય છે અથવા value store કરી શકાય છે.
13. What is Context API?
Answer (English):
Context API is used to share data across multiple components without passing props again and again.
Answer (Gujarati):
Context API દ્વારા data ઘણા components વચ્ચે share કરી શકાય છે props વગર.
14. What is Lazy Loading?
Answer (English):
Loading components only when they are needed.
Answer (Gujarati):
Component ત્યારે જ load થાય જ્યારે તેની જરૂર હોય.
Benefit: Faster app loading
Real Interview Tips for React Interview Questions 2026 (Must Read)
English:
- Don’t just memorize — understand concepts
- Give real-life examples
- Be honest if you don’t know something
- Explain your projects clearly
Gujarati:
- માત્ર યાદ ન કરો — સમજવાનો પ્રયાસ કરો
- real-life example આપો
- ના આવડે તો સાચું કહો
- તમારા project confidently explain કરો
Final Words
React is not hard but it requires clarity. If your basics are strong, you can answer most interview questions easily because you read React Interview Questions 2026.
Consistency + Practice = Success