The PasswordValidator feature in ASP.NET Core Identity helps enforce password complexity rules, including not allowing users to use their username as their password. It checks for various conditions like length, special characters, and username inclusion.

In ASP.NET Core Identity, the "Password History" option helps enforce password policies by preventing users from reusing recent passwords. It maintains a history of previously used passwords and checks new passwords against this history to ensure they are not reused.

In the URL /Books/Details/3, the "3" is a route parameter. Route parameters allow you to pass data from the URL to your controller actions, making it dynamic and allowing you to retrieve information specific to the value "3."

Exception handling in ASP.NET Core is crucial for maintaining the stability and reliability of applications. It allows developers to gracefully handle errors, provide meaningful error messages to users, and prevent crashes that could otherwise disrupt the user experience.

The UseStaticFiles middleware is responsible for serving static files, such as CSS and images, to clients. If users can't access these files, you might have forgotten to configure this middleware in the Startup.cs file. Ensure you've included app.UseStaticFiles(); in your Configure method to serve these files properly.

ASP.NET Core Web APIs primarily use the JSON (JavaScript Object Notation) format for transmitting data. JSON is lightweight, human-readable, and widely supported, making it a popular choice for APIs.

To configure session timeout in ASP.NET Core, you should use the "app.UseSession" method in the "Configure" method of the Startup.cs file. The session timeout can be set using the "IdleTimeout" property in the services.Configure method. This middleware enables session state in the application, and configuring the timeout here is the correct approach.

In an ASP.NET Core project, the "Program.cs" file serves as the entry point of the application. It contains the Main method, which creates the web host and starts the application. This is where the application configuration and host building occur before the application starts listening for incoming requests.

Attribute routes are typically found in Controller Actions within an MVC application. Controllers use attribute routing to define custom routes for their action methods, which can be more readable and maintainable than convention-based routing.

In the MVC (Model-View-Controller) pattern, the "View" component is responsible for displaying data to users. It defines the structure and layout of the web pages, presenting data from the model in a user-friendly format. Controllers handle the request processing, but views handle the presentation of data to the users.