Total 20 question (100 marks)
- 1. What is Babel?
- 2. How can you optimze performance for a function component that always renders the same way?
- 3. Which function call will create a React component from the React API?
- 4. Although React Hooks generally replace class components, there are no plans to remove classes from React.
- 5. Which item is needed for simple routing between React component but without a React Router?
- 6. A copy of the 'real' DOM that is kept in memory is called what?
- 7. In React what is used to pass data to a component from outside?
- 8. We can go for keys when there is a possibility that our user could change the data.
- 9. React considers everything as _______.
- 10. JSX is faster because it performs ____________ while compiling code to JavaScript
- 11. What characterizes the React Router?
- 12. which directory React Components are saved?
- 13. What is the smallest building block of ReactJS?
- 14. Which of the following will block a button in a React form and cancel the event, from form
- 15. What is not a benefit of unidirectional data flow?
- 16. If you see the following import in a file, what is being used for state management in the
- 17. What will happen if you render an input element with disabled = {false}?
- 18. What type of element will be rendered from the following code? function Hello() { return <h1>Hello reactjs</h1>; } ReactDOM.render(<Hello />, document.getElementById('root'));
- 19. What tool does React use to compile JSX?
- 20. Which prop type in a React form component, will validate a value for an attribute is passed and