Exam CRT-450 topic 1 question 54 discussion

Actual exam question from Salesforce's CRT-450

Question #: 54
Topic #: 1

A lead object has a custom field Prior_Email__c. The following trigger is intended to copy the current Email into the Prior_Email__c field any time the Email field is changed:

Which type of exception will this trigger cause?

A. A null reference exception
B. A compile time exception
C. A DML exception
D. A limit exception when doing a bulk update

Show Suggested Answer

Suggested Answer: C 🗳️

by am1 at May 6, 2020, 11:43 p.m.

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venkatasunilr

Highly Voted 3 years, 7 months ago

The correct answer is "C". In before triger you can modify the records without explicitly calling a DML insert or update operation.

upvoted 13 times

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ryuu

Highly Voted 2 years, 11 months ago

There is typo in second last line ‘trigger.old,ap’. If this is deliberately done then it will have compile time exception

upvoted 6 times

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irina_735

Most Recent 8 months, 2 weeks ago

Selected Answer: C

If the typo error was unintentional, then C is correct: System.SObjectException: DML statement cannot operate on trigger.new or trigger.old

upvoted 1 times

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1vanTT

1 year ago

C is correct. You don't make a DML statement in a before trigger as it gets implicitly updated after the trigger ends. The before trigger runs before the DML operation. https://www.sfdcpoint.com/salesforce/apex-trigger-in-salesforce/ Although there are many typos in the example which would prevent the code from saving / running.

upvoted 1 times

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Infoash

3 years, 8 months ago

The right answer is D. A limit exception when doing a bulk update

upvoted 1 times

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am1

4 years, 1 month ago

c, since DML stmt is inside for loop and can cause limit exception.

upvoted 4 times

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