Salesforce Certified Platform Developer II — Question 175

Ursa Major Solar has a custom object, ServiceJob＿c, with an optional Lookup field to Account called Partner_Service_Provider＿c.

The TotalJobs＿c field on Account tracks the total number of ServiceJob＿c records to which a partner service provider Account is related.

What should be done to ensure that the TotalJobs＿c field is kept up to date?

Answer options

• A. Create an Apex trigger on ServiceJob＿c.
• B. Change TotalJobs＿c to a roll-up summary field.
• C. Implement a workflow cross-object field update.
• D. Build a Process Builder with an invocable action.

Correct answer: B

Explanation

The correct answer is B because a roll-up summary field can automatically calculate the total number of related records (ServiceJob＿c) and keep the TotalJobs＿c field updated without additional code. An Apex trigger (A) would require manual coding and maintenance, while a workflow (C) does not support counting related records directly. Process Builder (D) can automate processes but is less efficient for this specific requirement compared to a roll-up summary field.