1. Why React is faster then normal websites?

2. What is the declarative way to render a dynamic list of components based on values in an array?

3. . What is [e.target.id] called in this code snippet?

  const handleChange = (e) => {
  setState((prevState) => ({ ...prevState, [e.target.id]: e.target.value }));
}

4. What is a react.js in MVC?

5. Consider the following code from React Router. What do you call :id in the path prop? > Route path=”/:id” / >

6. How many stages are there in React js life cycle

7. Which of the following method refers to the parent class in React.js?

8. 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);

9. Babel is a __________?

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

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

11.  React.js is written in which of the following language?

12. . What is the name of this component?

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

13. Which of the following is must for the API in React.js ?

14. Why should you avoid copying the values of props into a component’s state?

15. How do you destructure the properties that are sent to the Dish component?

  function Dish(props) {
  return (

{props.name} {props.cookingTime}

);