In React 16 and later versions, Array, Strings, and Numbers can be rendered using JSX syntax. For example, an array can be rendered using the map method, a string can be rendered using curly braces, and a number can be rendered directly.

In React, you can find the version of React at runtime in the browser by using the "React.version" property in the console. This will display the current version of React that is being used on the page.

Default props are props that are assigned default values in a React component. These default values are used if the prop is not passed to the component from the parent or if it is passed as undefined. Default props are defined using the defaultProps property on the component class.

Windowing is a technique used in React to optimize performance when rendering a large data set. Windowing involves rendering only a subset of the data that is currently visible on the screen, and dynamically rendering additional data as the user scrolls or interacts with the UI. This technique can significantly improve the performance of applications that need to render large amounts of data, such as tables, lists, and grids.

Data flow in React is unidirectional, meaning that data flows in a single direction from the parent component to the child component. This helps ensure that the application state is predictable and easier to manage.

React Fiber is a new rendering engine for React that was introduced in React 16. It is designed to improve performance and enable more flexibility in scheduling updates. With React Fiber, React can break up large updates into smaller chunks, prioritize updates, and pause and resume updates as needed.

React has some limitations, including a steep learning curve and limited SEO optimization. React's focus on component-based architecture can make it more difficult for beginners to learn and understand, and its reliance on JavaScript can make it less friendly to search engines. React can also struggle with performance on large datasets or complex UI components. React is primarily used for front-end development and does not have built-in support for back-end development.

The render() method is the required method to be defined for a class component in React. This method is responsible for rendering the component and returning the resulting element tree. All other methods, such as constructor() and componentDidMount(), are optional and serve specific purposes in the component lifecycle.

React Router is a higher-level abstraction on top of the history library. It provides a declarative API for routing and navigation in React applications, and manages the browser history and URL updates. The history library, on the other hand, is a low-level library that provides a simple interface for manipulating the browser history, and can be used directly in non-React applications.

Hooks in React can replace both render props and higher order components in some cases. Hooks can provide similar functionality to both of these patterns, while also simplifying the code and making it more reusable. For example, the "useEffect" Hook can replace the "componentDidMount" and "componentDidUpdate" lifecycle methods, as well as some uses of higher order components.