Which type of rendering is used with the Sitecore ASP.NET Core Rendering SDK?

The correct answer is JSON rendering, as it is specifically associated with how the Sitecore ASP.NET Core Rendering SDK operates. This type of rendering enables applications to function seamlessly with modern frontend frameworks by returning data in JSON format. This facilitates the integration of Sitecore with headless architectures, allowing content to be delivered to various client applications in a lightweight and easily consumable manner.

JSON rendering is particularly advantageous in scenarios where a developer needs to supply dynamic content to a SPA (Single Page Application) or any frontend technology that consumes JSON data. By leveraging this rendering type, developers can build responsive, interactive applications while maintaining Sitecore's robust content management capabilities in the backend.

In contrast, the other rendering types mentioned are more closely associated with traditional ASP.NET MVC applications. Controller rendering and MVC rendering are primarily focused on producing server-rendered HTML content, while view rendering may not be as effective in a headless context, where separation of concerns and flexibility in frontend technologies are pivotal. JSON rendering stands out as the most modern and suitable choice for projects utilizing the ASP.NET Core Rendering SDK within Sitecore.