TCS - ReactJS Interview | Frontend Developer | 2+ Years | Javascript Interview Questions #reactjs

TCS - ReactJS Interview | Frontend Developer | 2+ Years | Javascript Interview Questions

1. Advantages and Disadvantages of ReactJs?
2. What is the entry point of ReactJs?

3. What is HOC? Have you used in your project?

4. What is React Context API and when to use?

5. How do you handle api calls in React by Axios or fetch?

6. How do you chain multiple APIs calls that is depending on previous one?
7. How do you optimize a React application?
. i. Windowing or List Virtualization in React Applications
ii. Key Coordination for List Rendering
iii. Lazy loading Images in React
v. Pure Component
vi. useMemo & useCallback hooks
vii. High Order Component
viii. Code splitting in React using dynamic import()
ix. Using immutable data structures
x. Using Reselect in Redux to Optimize Rendering

8. What is the Pure Component and how will you implement in functional component?

9. Explain controlled and uncontrolled component?

10. Redux questions on Action, Reducer and State

11. How to aviod mutating an array when performing an operation?

12. Shallow copy vs Deep Copy

13. Event bubbling

14. Es6 features you have used

15. difference between map, filter, reduce and foreach

16. Some javascript programs