SALESFORCE-PD1 User Interface Practice Question
A developer is building a Visualforce page that uses a custom controller and needs to display a message to the user when an error occurs. Which class and method should be used?
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
✓
ApexPages.addMessage()
ApexPages.addMessage() adds an ApexPages.Message to the page messages list.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
ApexPages.currentPage().getParameters().put()
Why it's wrong here
Used for setting page parameters.
- ✓
ApexPages.addMessage()
Why this is correct
Adds a message object to the page messages queue.
- ✗
Database.addError()
Why it's wrong here
Used on sObject records during triggers.
- ✗
System.debug()
Why it's wrong here
Outputs debug logs, not UI messages.
About these practice questions
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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.