ReactJS Quiz PDF

ReactJS Quiz Multiple Choice: 1. What is ReactJS primarily used for? o A) Backend development o B) Building reusable UI components o C) Database management o D) Mobile app development 2. Who initially developed ReactJS? o...

ReactJS Quiz Multiple Choice: 1. What is ReactJS primarily used for? o A) Backend development o B) Building reusable UI components o C) Database management o D) Mobile app development 2. Who initially developed ReactJS? o A) Google o B) Microsoft o C) Facebook o D) Apple 3. Which of the following best describes React’s approach to UI updates? o A) Imperative o B) Declarative o C) Procedural o D) Synchronous 4. What does ReactJS use to optimize rendering performance? o A) Real DOM o B) Virtual DOM o C) Inline CSS o D) Server-side rendering 5. What is the purpose of React components? o A) To break UI into small, reusable units o B) To store large amounts of data  o C) To directly manipulate the DOM o D) To handle backend logic 6. Which of the following best describes React’s approach to UI updates? o A) React updates the actual DOM directly o B) React ignores DOM updates o C) React uses the Virtual DOM for efficient updates o D) React relies only on server-side rendering 7. What is a React Component? o A) A function that updates the backend o B) A small, reusable UI element o C) A part of the browser’s native APIs o D) A built-in JavaScript method 8. Which of the following best describes React’s approach to UI updates? o A) React updates the actual DOM directly o B) React ignores DOM updates o C) React uses the Virtual DOM for efficient updates o D) React relies only on server-side rendering True or False 9. ReactJS enforces a bidirectional data flow. (True/False) 10. React can be used for both client-side and server-side development. (True/False) 11. The Virtual DOM is a copy of the real DOM that helps in efficient updates. (True/False) 12. React is a framework rather than a library. (True/False) 13. JavaScript knowledge is a prerequisite for learning ReactJS. (True/False) 14. ReactJS is an open-source, component-based library. 15. The Virtual DOM in React is a direct copy of the actual DOM. 16. React enforces bidirectional data flow between components.  17. JSX is required to write React components. 18. React can be used both on the client-side and the server-side. Short Answer Questions 19. What is the main objective of ReactJS? 20. Explain the concept of Virtual DOM in ReactJS. 21. How does React handle component state updates efficiently? 22. How does ReactJS improve performance compared to traditional DOM manipulation? 23. What problem does ReactJS solve in UI development? 24. What is the advantage of using the Virtual DOM in ReactJS? 25. Name three prerequisites required to learn ReactJS