Exam Certified Platform App Builder topic 1 question 103 discussion

Should be Formula Field

Answer D - Workflow Rule: only triggers on Opportunity Creation, criteria Account.BillingState != null Action: Field Update - Use formula to update field, Account_Billing_State__c = Account.BillingState (Do not re-evaluate workflow rules after field change, in case of any potential recursion storm.) Apex Trigger, after insert could also work here but the question clearly states, no code. It is absolutely not A - A formula field acheives the first part but not the caveat, as any Billing State change will reflect after update in the opportunity as well.

First I thought of A but since Formula fields can change over time then it should be D. You can set the workflow rule so you cannot change the fields later.

If use Formula Field, the value can be change if the associated account has been changed.But if you use a WF that with criteria 'created record' and read only field that value will be not be change at all time.

The reason why A is incorrect: IF(ISNEW(), Account.BillingState , PRIORVALUE(Account.BillingState)) this would be true only if formula field supported ISNEW and PRIORVALUE functions. Correct answer is D. Workflow rule can be created on opportunity that will fire only when record is created.

Tested with workflow - also works. Maybe this question should have 2 correct answers.

Tested with Formula field - it works. It is A

"Workflow" is incorrect because it is totally irrelevant. We are not updating any field here. Our end goal is to display other object's fields on our record. "Apex" is incorrect because when we can accomplish it with the Formula field we should not use Apex for it. "Roll-up summary field" is incorrect because it is totally irrelevant. The roll-up summary field summarizes data from all the related records and displays them on a specific field. The correct Answer is A

Workflow can be set up to run upon creation only, therefore the field will never change after its been created. A formula field will work in real-time with the associated Account's billing state, updating repeatedly. The correct answer is workflow, D.

I am going with Formula - A

isNEW() function is only available for workflow not for validation rule. so Workflow is the right answer