Скачать или смотреть Redux Interview Question Redux Lifecycle Actions Dispatch Reducers Store State REST vs WebSocket

Are you preparing for a React or MERN Stack interview in 2025

This video explains the most important and commonly asked Redux and real time communication questions. These topics are frequently asked in frontend, React.js, MERN stack, and junior developer interviews.

I explain Redux architecture, its lifecycle, how actions work, how reducers update the state, the role of the store, dispatch flow, and the difference between REST API and WebSocket communication.

This video is perfect for freshers, beginners, and 1 to 2 year experienced developers preparing for React or Redux interviews.

🌟 Topics Covered in This Video
1 What is Redux

Redux is a state management library that helps manage global state in large frontend applications. It provides a predictable way to store and update application data.

2 Redux Lifecycle

Action is created
Action is dispatched
Reducer receives the action
Reducer updates the store based on action type
New state is sent to UI
UI re-renders with updated data

3 What is an Action in Redux

Action is a plain JavaScript object that describes what should happen. It must have a type property and can contain additional data.

4 What is Dispatch

Dispatch is a function used to send an action to the Redux store. It triggers the reducer to update the state.

5 What is a Reducer

A reducer is a pure function that takes current state and action and returns new updated state. Reducers do not modify state directly but return a copy.

6 What is a Store

The store holds the entire application state in Redux. It connects actions, reducers, and UI. Only one store exists in a Redux application.

7 What is State

State represents the data of the app. Redux manages global state, while React's useState manages local component state.

8 Difference Between REST and WebSocket

REST is request and response based.
WebSocket provides continuous two way communication.
REST is stateless.
WebSocket is stateful.
REST is slower for real time updates because the client must request data repeatedly.
WebSocket is ideal for chat apps, live notifications, stock data, multiplayer games etc.

📝 Notes for Viewers (Perfect for Revision)
Redux Important Notes

Redux helps manage large scale state.
Store keeps global state.
Actions describe what is happening.
Dispatch sends an action to the store.
Reducers update state and must remain pure functions.
UI re-renders when the Redux store updates.

Redux Lifecycle Notes

User interacts with UI
Action is created
Action is dispatched
Reducer processes the action
Store updates
UI re-renders

REST vs WebSocket Notes

REST works on request and response
WebSocket stays connected continuously
REST is best for standard APIs
WebSocket is best for live updates



React Redux interview questions 2025
Redux lifecycle explained
What is dispatch in Redux
What is action in Redux
Redux reducer explanation
Redux store interview questions
Redux for beginners
React interview preparation
REST vs WebSocket difference
WebSocket explained for beginners
Frontend interview questions
MERN stack interview topics
React state management
Redux global state
Redux flow explained



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