React Questions

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React Questions

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1. What is the children prop?

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2. What will happen if you render an input element with disabled = {false}?

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3.  What is the use of React hooks?

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4. Using object literal enhancement, you can put values back into an object. When you log person to the console, what is the output?

const name = 'Rachel';
const age = 31;
const person = { name, age };
console.log(person);

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5. What happens when the following render() method executes?

render(){
   let langs = ["PHP","ES6","JAVA"]
     return ( < div>
       {langs.map(it =>  < p > {it}  < /p > )}
      < /div > )
 }

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6. What is React.js?

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7. What is the default local host port that a React development server uses?

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

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9. Props are __________ into other components

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10. When rendering a list using the JavaScript map() method, what is required for each element rendered?

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11. Which of the following is used in React.js to increase performance?

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12. Which of the following is NOT a rule for React Hooks?

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13. As soon as the state of react component is changed, component will

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14. To get the first item from the array (“cooking”) using array destructuring, how do you adjust this line?const topics = [‘cooking’, ‘art’, ‘history’];

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15. React separates the user interface into components. How are components combinded to create a user interface?

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