You create a custom entity. Records are created by users through the user interface, and through a backend Integration. You must combine two fields to populate a new field that will replace the name…

You create a custom entity. Records are created by users through the user interface, and through a backend Integration. You must combine two fields to populate a new field that will replace the name field on the entity. You need to ensure that the new field displays a result immediately after a new record is saved. What should you use?