Context is a way to pass data down to child components without using props. It is useful for data that needs to be accessed by many components at different levels of the component hierarchy. Context provides a way to avoid the "prop drilling" problem, where props need to be passed down through many layers of components.

To do logging in React Native, you can use the console.log() function, which writes messages to the console in the same way as in a web browser. You can also use other console functions, such as console.warn() and console.error(), to log warning and error messages.

If the React tab is not showing up in DevTools, it may be because the React app is not using React version 16 or higher. The React tab was introduced in version 16, so if you are using an earlier version of React, it will not be available in DevTools. You can check the React version in your app by looking at the package.json file or by running the command 'npm ls react'.

Flux is a design pattern for managing state in React applications. It was developed by Facebook and is often used in combination with React. Flux emphasizes a unidirectional data flow, in which data flows in a single direction through the application. This helps prevent issues with data inconsistency and makes it easier to manage state in large applications.

React Native is a mobile app development framework that allows developers to build mobile applications using JavaScript and React. It is a separate technology from React, which is a JavaScript library for building user interfaces on the web. While both React and React Native use a similar programming model, they have different APIs and are optimized for different platforms.

In React, the super() constructor with props argument is used to initialize the component's props and state. It is required when defining a constructor in a class component, and should always be called before accessing this.props or this.state.

Styled components are a library for creating React components with embedded styles. They allow you to define styles directly in your JavaScript code using tagged template literals, which makes it easy to style your components based on props and state. Styled components also provide a number of other features, such as server-side rendering, theming, and global styles.

To access the Redux store outside of a component, you can use the getState() method provided by the Redux store. This allows you to access the current state of the store and is often used in middleware or in other parts of the application that do not have direct access to the store.

In React, you can make an AJAX call by using the "fetch" API or a library like Axios or jQuery. The recommended lifecycle method to make an AJAX call is "componentDidMount()", which is called once the component has been mounted to the DOM. This method is a good place to fetch data from an API or server, and update the component state with the new data.

Relay is a library for handling data fetching and caching in React applications. It is often used in conjunction with GraphQL APIs. While Redux is a state management library, Relay focuses specifically on data fetching and caching. Relay provides a number of features, such as declarative data requirements, automatic query generation, and optimistic updates.