A developer created a trigger on a custom object. This custom object also has some dependent pick lists.
According to the order of execution rules, which step happens first?
A. System validation is run for maximum field lengths.
B. The original record is loaded from the database.
C. Old values are overwritten with the new record values,
D. JavaScript validation is run In the browser.
D. JavaScript validation is run In the browser.
Explanation:
Salesforce follows a specific order of execution when processing DML operations. The first step in this process is loading the original record from the database.
Order of Execution:
1️⃣ The original record is loaded from the database.
If the operation is Update, Salesforce retrieves the record before applying new changes.
This step ensures the system has the correct existing values for comparison.
2️⃣ Field values are overwritten with new values from the request.
This includes updates to picklist values and other fields.
3️⃣ System validation rules are applied (A).
This includes checks for field lengths, required fields, data types, and dependent picklists.
4️⃣ Before Triggers execute.
Any business logic defined in before insert/update triggers runs before saving.
5️⃣ JavaScript validation is run in the browser (D).
If applicable, client-side validation occurs before the request reaches Salesforce servers.