New Release PDI Developers Questions

The correct answer is option C, which is the upsert statement. In Salesforce, when you have a custom object and want to insert new records and update existing ones using an external ID field, you use the upsert DML operation. The upsert statement either inserts or updates sObject records based on the value of a specified unique external ID field. References: The information can be referenced from the official Salesforce documentation and learning materials available on Trailhead. Specifically, it aligns with the objectives outlined in data modeling and management, as well as Apex programming basics where DML operations are discussed. Salesforce DML Operations

The Trigger.old context variable returns a list of the old versions of the sObject records. This sObject list is only available in update and delete triggers1. In a before insert trigger, there are no old versions of the records, so the Trigger.old context variable is null2. References:

• 1: Trigger Context Variables | Apex Developer Guide | Salesforce Developers
• 2: Get Started with Apex Triggers Unit | Salesforce Trailhead

Formulas are expressions that are used to calculate and display values based on the data in your records. Formulas can be used in various contexts, such as formula fields, validation rules, workflow rules, and so on. Some of the characteristics related to formulas are:

• Formulas are calculated at runtime and are not stored in the database. This means that every time a record is viewed or a report is run, the formula is evaluated based on the current data in the record. This ensures that the formula results are always up to date and accurate1.
• Formulas can reference values in related objects. This means that you can use formulas to access data from parent or child objects, or even from objects that are indirectly related via lookup or master-detail relationships. For example, you can use a formula field on the Opportunity object to display the account owner’s name by referencing the Owner.Name field on the Account object2.
• Formulas cannot reference themselves. This means that you cannot use a formula field or variable as part of its own definition. For example, you cannot create a formula field called Total Amount that adds itself to another field. This would create a circular reference and cause an error3.
• Fields that are used in a formula field cannot be deleted or edited without editing the formula. This means that if you want to delete or change a field that is referenced by a formula field, you have to modify the formula field first to remove or update the reference. Otherwise, the formula field will become invalid and display an error. References: 1: Formula Operators and Functions by Context - Salesforce Developers (3) 2: Cross-Object Formulas - Salesforce Help (4) 3: Tips for Working with Formulas - Salesforce Help (5) : Considerations for Deleting Fields - Salesforce Help (6)

To satisfy this requirement, a developer should use an invocable method. An invocable method is a method that can be called from a flow and can perform complex logic or integrate with an external system. An invocable method can also return data to the flow, such as a list of order numbers and dates. An invocable method can be annotated with @InvocableMethod to make it available in Flow Builder as an Apex action. An Apex controller is used to provide data and logic to a Visualforce page or a Lightning component, not a flow. An Apex REST class is used to expose custom REST API endpoints, not to retrieve data from an external system. An outbound message is used to send notifications to external systems when a certain event occurs in Salesforce, not to display data on a screen. References:

• Call Apex Code from a Flow
• InvocableMethod Annotation
• Free Salesforce Platform Developer 1 Practice Exam (With Answers)