Salesforce App Builder Practice Exam

In an indirect lookup relationship, the child object must be an external object. This relationship is specifically designed to deal with data stored outside of the Salesforce platform, allowing Salesforce to link to data from an external source while maintaining referential integrity.

External objects are defined in Salesforce to facilitate interactions with external data sources via Salesforce Connect. When setting up an indirect lookup relationship, the external object serves as a child that relates to a standard or custom parent object in Salesforce. This functionality is integral for organizations that rely on both Salesforce data and external data, enhancing the ability to create a seamless user experience across diverse data systems.

The other object types, such as standard or custom objects, cannot serve as children in this context, which is why they are not the correct answer. Understanding this concept is crucial for properly implementing Salesforce data models that incorporate external systems effectively.