ReactJs in Easy level
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Total 20 question (100 marks)
1. React supports all the syntax of _________________.
2. Select the programming language NOT used within the ESLintrc file.
3. If our elements are dynamic, react can keep track of the changes using keys.
4. React component names must begin with an uppercase letter.
5. A copy of the 'real' DOM that is kept in memory is called what?
6. What type of element will be rendered from the following code? function Hello() { return <h1>Hello reactjs</h1>; } ReactDOM.render(<Hello />, document.getElementById('root'));
7. What does the "webpack" command do?
8. The RouterHandler object is listed in which React library.
9. What if added to a component's style, determines the primary axis of its layout, and if using the
10. How can you optimze performance for a function component that always renders the same way?
11. Which code statement will set the value of a text box in the child component input field in
12. React keeps track of what items have changed, been added, or been removed from a list using ________.
13. The state can be initialized when code is loaded or the state can be set on event changes.
14. How do you access a function fetch() from a h1 element in JSX?
15. How can we prevent default behavior in React? What method you can call?
16. What is the children prop?
17. Components cannot refer to other components in their output.
18. ReactJS uses _____ to increase performance.
19. What tool does React use to compile JSX?
20. What information is passed to dispatcher after an action is created in Flux, in React?
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