Salesforce App Builder Practice Exam

Which component type must be present for creating a roll-up summary in Salesforce?

1. Lookup relationship field on parent object.

2. Master-detail relationship field on child object.

3. Lookup relationship field on child object.

4. Master-detail relationship field on parent object.

The correct answer is: Master-detail relationship field on child object.

Creating a roll-up summary field in Salesforce requires a specific relationship between the parent object and the child object. A roll-up summary can only be created on a master-detail relationship, which means that the child record is dependent on the parent record. In this context, the correct choice indicates that there must be a master-detail relationship field on the child object. The roll-up summary field operates by aggregating data from related child records (such as sum, count, or minimum/maximum values) and displaying that information on the parent record. This relationship ensures that the parent can accurately summarize the data from its children. The master-detail relationship also makes sure that when the parent record is deleted, the child records are also deleted, which maintains data integrity. Thus, the presence of a master-detail relationship on the child object is essential for roll-up summaries to function correctly, accurately processing and summarizing the related child data for the parent record.