Sitecore-10-NET-Developer Exam Dumps : Sitecore 10 .NET Developer Exam

 When creating your containerized Sitecore environment with Docker, you need two files to launch the containers: docker-compose.yml and .env. The docker-compose.yml file contains the configuration of the services that make up the Sitecore environment, such as the roles, networks, volumes, and dependencies. The .env file contains the environment variables that are used by the docker-compose.yml file, such as the Sitecore license path, the image tags, the host names, and the passwords. These files are recommended because they simplify the process of launching the containers and allow you to customize the environment according to your needs. References:

• Sitecore Containers documentation
• Docker Compose file reference
• [Environment variables in Compose]

 If the Sitecore Content Management instance can be accessed by multiple host names, you need to add AllowedCorsOriginsGroup for each site to the Identity Server configuration. This will enable the users for each site to be able to log in to the Sitecore shell using the Identity Server. The AllowedCorsOriginsGroup element defines a group of URIs that are allowed to make cross-origin requests to the Identity Server. You can use multiple subnodes to define more than one URI, or you can use the | symbol to separate URIs within a node. You can also use the {AllowedCorsOrigin} template to simplify the configuration. When you use that template, all origins (hosts) are notified about the sign-out1. References:

• Single sign-out

This answer is based on the Sitecore documentation of dynamic placeholders1. Dynamic placeholders are an extension of the regular Sitecore placeholders that allow you to add the same placeholder name several times across multiple renderings, and even within the same rendering. Dynamic placeholders generate a unique key for each placeholder instance, which ensures that the content within the placeholder is unique and not duplicated. Dynamic placeholders also enable you to build functionality that generates multiple placeholders within the same rendering dynamically. For example, you can use dynamic placeholders to create a tab component that can have any number of tabs, each with its own content. References:

• Dynamic placeholders
• Sitecore dynamic placeholders and JSS
• Walkthrough: Configure your components to use dynamic placeholders