Describe the Use Cases for and Benefits of External IDs. PLATFORM-DEVELOPER-II Practice Questions (Page 5)

Questions 21–23

1. 21foundation · easy

   What does marking a field as an external ID with the 'Unique' property do?

   • AIt makes the field visible on all page layouts.
   • BIt ensures that every record has a value in this field.
   • CIt ensures that no two records can have the same value in this field.
   • DIt automatically encrypts the field values.
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2. 22expert · hard

   A company is integrating its CRM with an external support system. The support system uses a unique ticket number. The integration needs to update existing tickets in Salesforce and create new ones. The integration developer is considering using an external ID field on the Ticket object. However, the developer is concerned that the external ID field might not be unique across all records. What should the developer do to ensure the external ID field is unique?

   • ASelect the Unique checkbox on the external ID field.
   • BCreate a validation rule that checks for duplicate external ID values.
   • CUse a before-insert trigger to check for duplicate external ID values.
   • DUse the Salesforce record ID as the external ID.
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3. 23foundation · easy

   How do external IDs facilitate data integration?

   • ABy creating a direct database connection between Salesforce and the external system.
   • BBy automatically syncing all data between Salesforce and external systems without any configuration.
   • CBy storing the Salesforce record ID in the external system for reference.
   • DBy providing a common identifier that maps external system records to Salesforce records.
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