In a large application, code splitting using dynamic imports and Webpack's built-in SplitChunksPlugin is a common strategy to efficiently split and load code chunks. This allows for better management of dependencies and loading only the necessary code for each page, resulting in faster initial load times and better performance. It's an essential technique for optimizing large-scale applications in a DevOps context.

Render Props are often used for data fetching and state management in React applications. They allow components to provide data or functionality to their children, making them a suitable choice for scenarios where components need to share data or behavior without being tightly coupled. They are not typically used for unrelated code sharing, styling, or routing.

useState is the React hook used to manage local state in functional components. It allows functional components to maintain their state without using class components. useEffect is used for side effects and lifecycle methods like componentDidMount are used in class components, not functional ones. this.state is used in class components but not with hooks.

Stateless components in React are also known as Functional Components. These components are defined as JavaScript functions and do not have internal state management. They receive props and render content based on those props. The other options do not accurately describe stateless components.

React Portals are commonly used to render modals outside the main DOM hierarchy. This is especially useful for rendering elements like modals, which need to float above the main application content but may have complex structures.

To connect a React component to the Redux store, one commonly uses the mapStateToProps function. This function maps the state from the Redux store to the props of the connected component, allowing it to access and display the state data. It's an essential part of integrating Redux with React for state management.

When making API calls using Axios, you can handle errors by using the catch() method to catch any errors that occur during the request. Axios will reject the promise if the request encounters an error, allowing you to handle the error condition and take appropriate actions. Throwing an exception or returning an empty response are not standard error-handling practices in Axios.

To prevent shared code from being loaded multiple times, you should use Webpack's code splitting with dynamic imports to create a shared bundle. This ensures that the shared code is loaded once and reused across routes as needed. Combining code into a single file doesn't achieve code separation and may result in larger bundles. Loading via CDN and server-side rendering address different issues.

Immutable data structures enforce state immutability, meaning once a state is set, it cannot be changed directly. This helps optimize React component re-renders because React can efficiently detect if the state has changed by comparing references, reducing unnecessary re-renders. Changing state directly (Option 1) is against React best practices and can lead to rendering issues.

When using React.lazy() and Suspense for lazy loading, a potential concern is delayed rendering of components. As components are loaded only when needed, there might be a delay in rendering, leading to potential UI glitches and perceived performance issues. This can impact the user experience negatively. It's important to manage this concern when implementing lazy loading in React.