Exam Certified Platform App Builder topic 1 question 480 discussion

Actual exam question from Salesforce's Certified Platform App Builder

Question #: 480
Topic #: 1

[All Certified Platform App Builder Questions]

Universal Containers (UC) has a custom Invoice object and a custom Invoice Line Item object. The Invoice Line Item object has a lookup relationship to the Invoice. UC would like to convert the lookup relationship to a master-detail relationship but is unable to do so.

Which two reasons could be preventing this relationship conversion? (Choose two.)

A. There are already two master-detail relationships on the Invoice Line Item.
B. Invoice Line Item records exist without having the Invoice lookup field populated.
C. Custom objects are unable to be on the detail side of a master-detail relationship.
D. There is a roll-up summary field on the Invoice object.

Show Suggested Answer

Suggested Answer: A 🗳️

by wlthorn at Feb. 1, 2023, 4:15 p.m.

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igorshpak

Highly Voted 2 years, 4 months ago

Selected Answer: A

A B for sure!

upvoted 8 times

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sfreesway

Highly Voted 2 years ago

Just in case anyone is wondering: The current relationship between the 2 objects is lookup, you can only make a rollup sum field on objects with a master-detail relationship so it cant be D We all know you can make roll ups on custom objects so ofc cant be C either You cant have more than 2 master details fields per object You cant change a lookup into master detail if any of the child object records don't have data in that field like wIthorn said below So the 2 answers have to be A & B

upvoted 5 times

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SHK1207

Most Recent 11 months, 1 week ago

Correct answer is A & B

upvoted 2 times

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IcyKyoX

2 years, 5 months ago

This is 2 possible answers question type. In my opinion second good answer should be B

upvoted 2 times

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wlthorn

2 years, 5 months ago

When converting a lookup relationship to a master-detail relationship, all detail records must have a related master record. If there are records without a populated lookup field, the conversion will fail. Additionally, when a master-detail relationship is established, the detail object cannot have a roll-up summary field, so the conversion will fail if there is a roll-up summary field on the Invoice object.

upvoted 2 times

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wlthorn

2 years, 5 months ago

B. Invoice Line Item records exist without having the Invoice lookup field populated. D. There is a roll-up summary field on the Invoice object.

upvoted 1 times

igorshpak

2 years, 4 months ago

D is wrong. You cannot create roll-up on look-up, only master-detail.

upvoted 5 times

sfreesway

2 years ago

Yup there cant be a roll up already on the field as they haven't converted it yet

upvoted 1 times

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