State management comparison in React Native - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is local state in React Native?

Local state is data managed within a single component using hooks like useState. It affects only that component and its children.

beginner

What problem does Context API solve in React Native?

Context API helps share data across many components without passing props manually at every level, useful for global settings like themes or user info.

intermediate

How does Redux manage state differently than local state?

Redux stores all app state in a single global store. Components read state and dispatch actions to update it, making state predictable and easier to debug.

intermediate

What is a key advantage of using Recoil for state management?

Recoil allows fine-grained state management with atoms and selectors, enabling components to subscribe only to the state they need, improving performance.

beginner

When should you prefer local state over global state management?

Use local state when data is only relevant inside one component or a small part of the app to keep things simple and avoid unnecessary complexity.

Which state management method is best for sharing theme settings across many components?

A Redux

B Local state

C Context API

D Component props only

Context API is designed to share data like themes globally without prop drilling.

What is a main feature of Redux?

A State only inside one component

B Single global store with actions

C Automatic UI updates without actions

D No need to write reducers

Redux uses a single global store and actions to update state predictably.

Which hook is commonly used for local state in React Native?

A useState

B useEffect

C useContext

D useReducer

useState is the basic hook for managing local state.

Recoil state management uses what to represent pieces of state?

A Atoms

B Reducers

C Props

D Contexts

Recoil uses atoms to represent individual pieces of state.

When is it better to use local state instead of global state?

A When you want to use Redux

B When state is shared across many components

C When you want to avoid using hooks

D When state is only needed inside one component

Local state is simpler and best when data is only relevant inside one component.

Explain the differences between local state, Context API, and Redux in React Native.

Think about how and where the state is stored and shared.

Describe a scenario where using Recoil would be more beneficial than Redux or Context API.

Consider how Recoil manages atoms and selectors.