Redux Interview Questions Your Guide to Success
Redux is a state management library for JavaScript apps. Jobpe provides interview questions covering core concepts, middleware, and best practices.
redux
- Frontend
What is Redux and what problem does it solve?
Redux is a predictable state container for JavaScript apps that helps manage application state in a centralized way.
Explain the core principles of Redux.
Redux is based on single source of truth, state is read-only, and changes are made with pure functions called reducers.
What are actions and reducers in Redux?
Actions are plain objects that describe changes; reducers specify how the state changes in response to actions.
How do you connect Redux with React components?
Using react-redux library's connect function or hooks like useSelector and useDispatch.
What is middleware in Redux and why is it used?
Middleware extends Redux's capabilities by intercepting actions for logging, async calls, or other side effects.
Explain the concept of immutability in Redux.
State is immutable; reducers return new state objects instead of mutating existing state.
How does Redux Toolkit simplify Redux development?
Redux Toolkit provides utilities to write simpler reducers, immutable updates, and includes middleware by default.
What are selectors in Redux?
Selectors are functions that extract and derive data from the Redux store state.
Describe how asynchronous actions are handled in Redux.
Asynchronous actions are handled using middleware like redux-thunk or redux-saga.
What are common pitfalls when using Redux?
Common pitfalls include overly complex state, excessive boilerplate, and improper state normalization.
Frontend
What is Redux and what problem does it solve?
Redux is a predictable state container for JavaScript apps that helps manage application state in a centralized way.
Explain the core principles of Redux.
Redux is based on single source of truth, state is read-only, and changes are made with pure functions called reducers.
What are actions and reducers in Redux?
Actions are plain objects that describe changes; reducers specify how the state changes in response to actions.
How do you connect Redux with React components?
Using react-redux library's connect function or hooks like useSelector and useDispatch.
What is middleware in Redux and why is it used?
Middleware extends Redux's capabilities by intercepting actions for logging, async calls, or other side effects.
Explain the concept of immutability in Redux.
State is immutable; reducers return new state objects instead of mutating existing state.
How does Redux Toolkit simplify Redux development?
Redux Toolkit provides utilities to write simpler reducers, immutable updates, and includes middleware by default.
What are selectors in Redux?
Selectors are functions that extract and derive data from the Redux store state.
Describe how asynchronous actions are handled in Redux.
Asynchronous actions are handled using middleware like redux-thunk or redux-saga.
What are common pitfalls when using Redux?
Common pitfalls include overly complex state, excessive boilerplate, and improper state normalization.
