Interview Questions

REACT JS

Q1. What is React?

Q2. Why is React used?

Q3. Is React a library or framework?

Q4. What is SPA (Single Page Application)?

Q5. What is JSX?

Q6. Can browser understand JSX?

Q7. What is a component?

Q8. Types of components in React

Q9. What is functional component?

Q10. What is state?

Q11. What are props?

Q12. Difference between state and props

Q13. What is useState hook?

Q14. What is useEffect hook?

Q15. What is virtual DOM?

Q16. Difference between real DOM and virtual DOM

Q17. What is key in React?

Q18. What is event handling in React?

Q19. How to apply CSS in React?

Q20. What is React fragment?

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REACT JS - 2

Q1. What are React hooks?

Q2. Why hooks were introduced?

Q3. Rules of hooks

Q4. What is controlled vs uncontrolled component?

Q5. What is conditional rendering?

Q6. What is prop drilling?

Q7. What is context API?

Q8. Difference between useEffect and lifecycle methods

Q9. What is component re-rendering?

Q10. What is use Callback()?

Q11. What is form handling in React?

Q12. How to handle API calls in React?

Q13. What is Axios vs Fetch?

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REACT JS - 3

Q1. How React works internally?

Q2. How virtual DOM improves performance?

Q3. How to optimize React app performance?

Q4. What is higher-order component (HOC)?

Q5. What is render props?

Q6. How hooks work internally?

Q7. What is strict mode?

Q8. How to handle large-scale React apps?

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NEXT.JS QUESTIONS

Q1. What is Next.js?
Q2. Is Next.js frontend or backend?
Q3. Why use Next.js instead of React?
Q4. What is SSR?
Q5. What is SSG?
Q6. What is file-based routing?
Q7. What is pages folder?
Q8. What is app router?
Q9. What is Link component?
Q10. What is Image component?
Q11. What is Head component?
Q12. What is environment variable in Next.js?
Q13. What is API route?
Q14. What is deployment in Next.js?
Q15. Is Next.js SEO friendly?

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NEXT.JS QUESTIONS - 2

Q1. Difference between React and Next.js
Q2. SSR vs SSG vs ISR
Q3. What is dynamic routing?
Q4. What is middleware?
Q5. What is get Static Props()?
Q6. What is getServerSideProps()?
Q7. What is get Static Paths()?
Q8. What is client component vs server component?
Q9. What is layout in Next.js?
Q10. What is metadata API?
Q11. What is routing group?
Q12. How authentication works in Next.js?
Q13. How API calling works in Next.js?
Q14. How environment config works?

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NEXT.JS QUESTIONS - 3

Q1. How Next.js handles rendering?
Q2. How Next.js improves performance?
Q3. What is image optimization internally?
Q4. How SEO works in Next.js?
Q5. How to build scalable Next.js apps?

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VUE.JS QUESTIONS

Q1. What is Vue.js?
Q2. Why Vue is popular?
Q3. Is Vue framework or library?
Q4. What is MVVM?
Q5. What is Vue instance?
Q6. What is template in Vue?
Q7. What is directive?
Q8. What is component in Vue?
Q9. What is props in Vue?
Q10. What is event handling in Vue?

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VUE.JS QUESTIONS - 2

Q1. How Vue reactivity works?
Q2. Virtual DOM in Vue
Q3. Vue vs React
Q4. How Vue handles performance?
Q5. How Vue handles large applications?
Q6. What is server-side rendering in Vue?
Q7. What is Nuxt.js?
Q8. Vue SSR vs Next.js
Q9. How to optimize Vue app?

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REDUX

Q1. What is Redux?
Q2. Why Redux is used?
Q3. What problem Redux solves?
Q4. What is global state?
Q5. What is store in Redux?
Q6. What is action?
Q7. What is reducer?
Q8. What is dispatch?
Q9. What is Redux Toolkit?
Q10. Why Redux Toolkit is better?
Q11. Is Redux compulsory in React?
Q12. Can we use Redux without React?
Q13. What is Provider in Redux?

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