Supreme React Test - 72+ MCQs: React test: Evaluate Your Proficiency with React Questions and Answers

1. What is the role of the dangerouslySetInnerHTML prop in React?

To set the component's initial state

To handle context API

To update the virtual DOM

To render HTML content dangerously

2. What is the purpose of the shouldComponentUpdate method in React?

To check if a component should re-render

To define the component's initial state

To handle component lifecycle

To update the virtual DOM

3. What are the advantages of using the React Context API over prop drilling, and in what scenarios is it preferable?

The React Context API is more efficient for handling global state

The React Context API is only suitable for class components

The React Context API is less performant than prop drilling

The React Context API is beneficial for passing data through deeply nested components

4. Explain the role of the React Router Prompt component and when it should be utilized.

The React Router Prompt component is used for handling asynchronous operations

The React Router Prompt component is used to prompt the user before navigating away

The React Router Prompt component defines the initial state of a component

The React Router Prompt component is used for styling React components

5. What is the role of the useHistory hook in React Router, and how can it be used?

To manipulate the browser's history

To define the initial state of a component

To manage context API in functional components

To handle asynchronous operations in functional components

6. How does React handle prop drilling?

By passing props through multiple components

By avoiding the use of props

By directly modifying parent components

By using Redux for state management

7. What is a React Hook?

A functional component

A reusable piece of logic

A component's lifecycle method

A way to style React components

8. How can you handle global state management in a React application without using Redux?

By using the useContext hook

By relying solely on component state

By creating a global variable outside the React component tree

By using the useReducer hook

9. What is the purpose of state in React?

To store component properties

To manage component styling

To maintain component history

To manage component data over time

10. How does the useTransition hook in React contribute to improving the user experience?

The useTransition hook enhances the transition animations in React

The useTransition hook is used for handling routing in React

The useTransition hook improves the performance of asynchronous operations

The useTransition hook has no impact on the user experience

React MCQ Test 5