SALESFORCE-PD1 User Interface Practice Question
A developer is building a Visualforce page and wants to execute an action method on the controller when a user clicks a button, without performing a full page reload. Which component should be wrapped around the area to be updated?
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
✓
apex:outputPanel with rerender attribute
<apex:actionRegion> or <apex:outputPanel> with <apex:actionSupport> or <apex:commandButton rerender=...> performs partial page updates.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
apex:pageBlock
Why it's wrong here
Provides styling structure, not AJAX behavior.
- ✗
apex:form
Why it's wrong here
Required for submission but does not perform partial AJAX updates by itself.
- ✓
apex:outputPanel with rerender attribute
Why this is correct
Enables AJAX partial page rendering.
- ✗
apex:actionFunction
Why it's wrong here
Defines a JavaScript function to call controller methods, not a container.
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.