React Developer Intern

An Interactive Matrix Color Change is a fun and engaging project designed to demonstrate dynamic user interaction with a grid of elements. The initial setup consists of a grid with all boxes set to a default background color (e.g., white). Each box in the matrix reacts to user interaction as follows:

Individual Box Interaction:
When a user clicks on any box, the background color of that box changes to green. This allows users to visually identify which boxes have been clicked. The click interaction adds an intuitive layer of feedback, enhancing the interactive nature of the application.

Final Box Interaction:
The last box in the matrix has a special role. Once the user clicks this final box, the application performs a unique sequence of events:

• All previously clicked boxes change their color to orange.
• This color change happens in the sequence of the user's clicks, creating a smooth, visually appealing animation effect. The remaining unclicked boxes also change to orange at the end, maintaining consistency across the grid.

Explain the difference between state and props in React. Provide an example of when you would use state in a component and another example of when you would use props. How does the unidirectional flow of data in React help maintain the application's structure? Briefly describe a situation where passing data through multiple components becomes cumbersome and how context or a state management library (like Redux) can solve this issue.

Explain the key differences between React class component lifecycle methods (e.g., componentDidMount, componentDidUpdate, componentWillUnmount) and React hooks like useEffect. Provide an example of a scenario where useEffect would replace multiple lifecycle methods in a class component. Discuss how the dependency array in useEffect helps control the execution of side effects and what issues might arise if it's not used correctly.

Show API fetching with a sample API link in ReactJS using either Axios or Fetch, and display the contents on the screen.