If a function component should always render the same way given the same props, what is a simple performance optimization available for it?

ReactJS - Quiz(MCQ)

Wrap it in the React.memo higher-order component.

Implement the useReducer Hook.

Implement the shouldComponentUpdate lifecycle method.

Implement the useMemo Hook.

Correct Answer : Wrap it in the React.memo higher-order component.

Recent Updates in React.JS

Q .

What do you need to change about this code to get it to run?

class clock extends React.Component {
  render() {
    return <h1>Look at the time: {this.props.time}</h1>;
  }
}

Remove this

Capitalize clock

Remove the render method

Add quotes around the return value

Correct Answer : Capitalize clock

Q .

Which Hook could be used to update the document's title?

useEffect(function updateTitle() { document.title = name + ' ' + lastname; });

useEffect(() => { title = name + ' ' + lastname; });

useEffect(function updateTitle() { name + ' ' + lastname; });

useEffect(function updateTitle() { title = name + ' ' + lastname; });

Correct Answer :

useEffect(function updateTitle() { document.title = name + ' ' + lastname; });