Azure DevOps is a popular DevOps tool that can automate the build, test, and deployment processes for ASP.NET Core applications. It provides a CI/CD pipeline for efficient deployment to various environments. Visual Studio is primarily an IDE, while Notepad++ and Fiddler are unrelated to deployment automation.

When a user submits a form in Razor, the data is usually sent to a/an HTTP POST method in a controller. The HTTP POST method is commonly used for form submissions because it allows data to be sent securely in the request body, and it's designed for actions that modify data on the server.

In an MVC (Model-View-Controller) project, you would typically place business logic or data access logic in Model classes. Models represent the data and business logic of your application, keeping the controller actions focused on handling HTTP requests and the views focused on rendering data. This separation of concerns is a key principle in MVC architecture.

To better organize and prioritize routes in a large-scale application with attribute routing, you can use Route Prefixes. By prefixing routes with common segments, you can group related routes together and reduce the risk of overlapping or conflicting routes. This strategy helps maintain a clear and structured routing system.

The best approach to clean up and organize repetitive namespace imports in Razor views is to create a common _ViewImports.cshtml file for shared namespaces. This file can be placed in the project root or a shared folder and then referenced by all the Razor views. This helps maintain consistency, reduces redundancy, and simplifies future updates to shared namespaces.

The RefreshSignInAsync method can be used to refresh the sign-in information of a user in scenarios like role updates or other security-sensitive operations. This method generates a new security token for the user, helping to prevent token-based attacks and ensuring the user's session remains secure.

To ensure that Entity Framework Core doesn't throw detailed database errors to the client, you should use "Exception Handling Middleware." This middleware intercepts exceptions, handles them, and returns a user-friendly error response to the client without exposing sensitive database details.

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.