JWT or JSON Web Tokens are often used in conjunction with the Bearer authentication scheme in ASP.NET Core. The Bearer scheme is commonly used to secure APIs and web applications, where a client includes a JWT token in the HTTP Authorization header to authenticate and authorize their requests. This scheme is based on the bearer token concept, where possession of the token is sufficient for authentication.

In advanced routing scenarios where the built-in routing capabilities of ASP.NET Core are insufficient, developers can leverage the RouteBuilder class. It provides more fine-grained control over route configuration, enabling customization and complex routing setups.

To optimize EF Core queries, you can use a SQL Profiler tool, such as SQL Server Profiler. These tools allow you to capture and review the generated SQL statements, analyze query performance, and identify areas for improvement. It's a crucial step in fine-tuning your application's database interactions.

Routing in ASP.NET Core MVC is primarily responsible for handling incoming HTTP requests and mapping them to the appropriate controller actions. It determines which controller and action method should respond to a particular URL, making it a crucial part of request handling and processing.

In a custom exception handling middleware, you must manually call the next middleware's InvokeAsync(context) method to ensure that the next middleware in the pipeline gets executed. This allows you to catch exceptions, perform custom handling, and then pass control to subsequent middleware components.

The primary purpose of ASP.NET Core Identity is authentication and authorization. It provides a framework for managing user authentication, user roles, and permissions in ASP.NET Core applications. It helps secure your application by verifying the identity of users and controlling access to resources.

Visual Studio is one of the most commonly used Integrated Development Environments (IDEs) by ASP.NET Core developers. It provides a robust set of tools and features for creating, testing, and deploying ASP.NET Core applications, making it a popular choice in the developer community.

You can extend the default IdentityUser class by creating a new class that inherits from it and adding the desired properties. This allows you to store additional information about the user in the same database table as the IdentityUser, providing a seamless integration with ASP.NET Core Identity.

Serving static files in a web application primarily aims to improve performance. By serving assets like CSS and JavaScript directly to the client's browser, it reduces the server's load and enhances the website's loading speed. This results in a better user experience and improved website performance.

For an ASP.NET Core MVC application to handle incoming HTTP requests and direct them to the appropriate controllers and actions, it must be configured to use the "Routing" middleware. Routing middleware determines how URLs are matched to controller actions, making it a critical part of request handling in MVC applications.