React Questions

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

2. Which of the following is the correct data flow sequence of flux concept?

3. If you created a component called Dish and rendered it to the DOM, what type of element would be rendered?

 functioDish() {
  return < h1 > Mac and Cheese < /h1 > ;
}

ReactDOM.render(< Dish > , document.getElementById('root'));

4. What function allows you to render React content in an HTML page?

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

6. What do you call a React component that catches JavaScript errors anywhere in the child component tree?

7. Which of the following are the advantages of React.js?

8. Babel is a __________?

9. What helps react for keeping their data unidirectional.?

10.  To create a constant in JavaScript, which keyword do you use?

11. What is the output of the below code ?

var Geeks=(props)=>
{
 return(
 

DSA Course 1
 

 

DSA Course 2
 

 );
}
ReactDOM.render( < DSA Course/ > ,mountNode)

12. React component names must begin with an uppercase letter.

13. In React.js which one of the following is used to create a class for Inheritance 

14.  If you want to import just the Component from the React library, what syntax do you use?

15. Which of the following is true about the below syntax ?disabled = {false}