Redux slices and actions in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a Redux slice?

A Redux slice is a part of the Redux store that manages a specific piece of state. It includes the state, reducers (functions to change state), and actions all bundled together.

beginner

What is an action in Redux?

An action is a plain JavaScript object that describes a change or event in the app. It usually has a type property and sometimes a payload with extra data.

intermediate

How do you create a slice using Redux Toolkit?

You use the createSlice function, which takes an object with name, initialState, and reducers. It automatically generates action creators and action types for you.

intermediate

Why are actions important in Redux slices?

Actions tell the reducers what happened so they can update the state accordingly. In slices, actions are generated automatically to keep code simple and consistent.

beginner

What does a reducer function do inside a Redux slice?

A reducer function takes the current state and an action, then returns a new state based on the action. It must not change the state directly but return a new copy.

What does createSlice automatically generate for you?

A Action creators and action types

B Only the initial state

C UI components

D Middleware functions

createSlice generates action creators and action types based on the reducers you define.

Which property is required in every Redux action?

A payload

B reducer

C state

D type

Every Redux action must have a 'type' property to describe the action.

Where do you define how state changes in a Redux slice?

A In the store configuration

B In the UI components

C In the reducers inside the slice

D In the middleware

Reducers inside the slice define how the state changes in response to actions.

What is the main benefit of using Redux Toolkit's createSlice?

A It simplifies writing Redux logic by bundling state, reducers, and actions

B It replaces React hooks

C It automatically creates UI components

D It removes the need for reducers

createSlice bundles state, reducers, and actions to simplify Redux logic.

In Redux, what must a reducer never do?

A Return a new state

B Modify the state directly

C Handle actions

D Be a pure function

Reducers must never modify the state directly; they should return a new state object.

Explain what a Redux slice is and how it helps organize state management.

Think about how a slice groups related logic together.

Describe the role of actions and reducers in updating the Redux store.

Consider how actions and reducers work together to change state.