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

A placeholder key is a unique identifier that is used to refer to a specific placeholder in the presentation details of an item. A placeholder key is defined in the placeholder settings item that is linked to a rendering or a sublayout. A placeholder key can also be defined in the code or markup of a component. A placeholder key can be static or dynamic. A static placeholder key has a fixed value, such as /main. A dynamic placeholder key has a variable value, such as /main-{GUID}, where {GUID} is replaced by a unique identifier at runtime. Dynamic placeholders allow multiple instances of the same component to be added to a placeholder without conflicts. References:

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Versioned layouts allow you to create different layouts for different versions of an item. This means you can have a specific layout for a specific version of the main page that is published for a specific period, such as a company anniversary celebration. You can easily revert to the original layout by switching back to the previous version of the main page. Versioned layouts are stored in the __Renderings field of the item, which is a versioned field. Versioned layouts are enabled by default in Sitecore 10. References:

• [Sitecore 10 .NET Developer Certification Study Guide], page 14
• [Sitecore Documentation: Versioned layouts]

 The field source is a property that you can set for some field types in a data template, such as Droplink, Droptree, Multilist, Image, File, and so on. The field source specifies the location of the items or media that the user can select from when editing the field. For example, if you have a Droplink field that allows the user to choose a category for an item, you can set the field source to point to a folder that contains the category items.This way, the user will only see the relevant items in the drop-down list. The field source can be a path, a GUID, or a Sitecore query that returns a single item or a list of items. The field source helps you to control the data source and the user interface for the field. References:

• The simple field types
• Controlling the list of items in a Selection field
• Using An Item’s Field as a Data Source in Sitecore