Salesforce Platform Developer Practice Exam

What is a Junction object?

1. An object that is on the detail side of a master-detail relationship with two different objects

2. An object that establishes a one-to-one relationship with another object

3. An object that cannot be used in workflow rules

4. An object exclusively for storing data temporarily

The correct answer is: An object that is on the detail side of a master-detail relationship with two different objects

A Junction object is specifically designed to establish a many-to-many relationship between two other objects in Salesforce. This relationship is implemented by using two master-detail relationships, where the Junction object acts as a bridge connecting these two objects. In the context of the question, when you have two different objects that need to relate to each other in a many-to-many fashion, a Junction object is created to serve that purpose by facilitating the connection. It allows each record of one object to be related to multiple records of another object, and vice versa. For example, if you have a "Students" object and a "Courses" object, you can create a Junction object like "Enrollment" to link students to the courses they are enrolled in. Each record in the Enrollment object can reference a specific student and a specific course, thus establishing the many-to-many relationship needed for these entities. Understanding the nature and purpose of Junction objects is vital in effectively designing Salesforce schemas to manage complex relationships between data types.