React

  • 1/20

    React is mainly for building ___

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  • 2/20

    Lifecycle methods are mainly used ___

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  • 3/20

    ____ can be done while more than one element needs to be returned from a component.

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  • 4/20

    How do you access a function fetch() from a h1 element in JSX?

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  • 5/20

    Which method in a React Component should you override to stop the component from updating?

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  • 6/20

    What's used to pass data to a component from outside?

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  • 7/20

    Which method in a React Component is called after the component is rendered for the first time?

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  • 8/20

    Which of the following is correct syntax for a button click event handler, foo?

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  • 9/20

    What happens when you call setState() inside render() method?

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  • 10/20

    What happens when the following render() method executes?

    render(){
    let langs = ["Ruby","ES6","Scala"]
    return (<div>
    {langs.map(it => <p>{it}</p>)}
    </div>)
    }
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  • 11/20

    How do you write an inline style specifying the font-size:12px and color:red; in JSX

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  • 12/20

    What are the advantages of ReactJS?

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  • 13/20

    What is state in React?

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  • 14/20

    What is ReactJS?

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  • 15/20

    What are the two ways that data gets handled in React?

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  • 16/20

    What are the disadvantages of ReactJS?

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  • 17/20

    Choose the right answer about JSX

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  • 18/20

    React merges the object you provide into the current state using

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  • 19/20

    Arbitrary inputs of components are called

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  • 20/20

    ref is used to refer a element / component returned by

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