SALESFORCE-PD1 Developer Fundamentals Practice Question
An Apex trigger needs to execute logic only when a specific custom field (Discount_Percent__c) on an Opportunity changes its value. Which comparison should the developer use?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Trigger.new[i].Discount_Percent__c != Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c
Comparing Trigger.new[i].Discount_Percent__c with Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c ensures code runs only when the field value is modified during an update.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Trigger.isChanged('Discount_Percent__c')
Why it's wrong here
Trigger.isChanged is not a valid Apex trigger method.
- ✗
Trigger.new[i].Discount_Percent__c != Trigger.old[i].Discount_Percent__c
Why it's wrong here
Trigger.old is a list, not guaranteed to be indexed identically to Trigger.new without using oldMap.
- ✓
Trigger.new[i].Discount_Percent__c != Trigger.oldMap.get(Trigger.new[i].Id).Discount_Percent__c
Why this is correct
Using Trigger.oldMap with record IDs is the robust way to compare old and new field values.
- ✗
Trigger.new[i].Is_Modified__c == true
Why it's wrong here
Is_Modified__c is a made-up field and not a standard tracking mechanism.
About these practice questions
This SALESFORCE-PD1 question is part of Courseiva's 488-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Salesforce exam blueprint
This SALESFORCE-PD1 practice question is part of Courseiva's free Salesforce certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SALESFORCE-PD1 exam.