React Hooks Building React App 4

Question 1

Which hook avoids passing props through many intermediate components (prop drilling)?

Accepted Answer

useContext

Answer

useState

Answer

useRef

Answer

useEffect

Question 2

To create a context in a React app, which API do you call?

Accepted Answer

React.createContext()

Answer

React.useContext()

Answer

React.makeStore()

Answer

React.provideState()

Question 3

Which hook is preferred for complex state logic with multiple sub-values?

Accepted Answer

useReducer

Answer

useId

Answer

useRef

Answer

useMemo

Question 4

What does a useReducer dispatch function do?

Accepted Answer

Sends an action to the reducer to compute new state

Answer

Renders JSX

Answer

Fetches data

Answer

Styles a component

Question 5

Which hook caches an expensive computed value between renders?

Accepted Answer

useMemo

Answer

useEffect

Answer

useState

Answer

useContext

Question 6

Which hook returns a memoized function to prevent unnecessary child re-renders?

Accepted Answer

useCallback

Answer

useMemo

Answer

useRef

Answer

useState

Question 7

When adding client-side routing to a React app, which library is commonly installed?

Accepted Answer

react-router-dom

Answer

react-fetch

Answer

react-state

Answer

react-style