React.js Quiz | Set-2

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    Question 1

    Which of the following is used to increase the performance of the React.js ?
    • Virtual DOM
    • Original DOM
    • Shallow DOM
    • Both of the above

    Question 2

    Which of the following is the class-based component in React.js ?
    • class
    • factory
    • render
    • props

    Question 3

    Which of the following is true about the below syntax ? 
    disabled = {false}
    • rendered as disabled
    • rendered at all
    • rendered as enabled
    • All of the above

    Question 4

    Which of the below category does react events come from ?

    • Destruction

    • Initialization

    • State/Property Updates

    • All of the above

    Question 5

    Which of the following is a way in which data get handled in React ?

    • state

    • props

    • model

    • A and B

    Question 6

    What is the output of the below code ? 
    var Geeks=(props)=>
{
 return(
 
    
DSA Course 1
 
    
 
    
DSA Course 2
 
    
 );
}
ReactDOM.render(<DSA Course/>,mountNode)
    • DSA Course 1
    • DSA Course 2
    • DSA Course 1 DSA Course 2
    • Error

    Question 7

    Which of the following is called a message that is closed inside the curly braces? 
    const messages="Hii Geeks";
const element =<p>{messages}<p>
    • JS Function
    • JS Element
    • JS Expression
    • JSX Wrapper

    Question 8

    Which below hooks in React js allows to directly create a reference to the DOM element ?
    • useHook
    • useState
    • useEffect
    • useRef

    Question 9

    Which of the following is the correct output of the below code. If a component is called Geeks and is rendered to another Dom which element will be rendered ? 
    function Geeks(){

return <h1> geeks For geeks </h1>
ReactDOM.render(,document.getElementById('root'));

}
    • div
    • section
    • h1
    • component

    Question 10

    Which of the below methods is used to render react content on an HTML page ?
    • React.mount()
    • ReactDOM.start()
    • ReactDOM.render()
    • React.render()

    There are 15 questions to complete.

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