SALESFORCE-PD1 Developer Fundamentals Practice Question
A developer creates a custom Lightning Web Component that includes a wired property to retrieve account records. The component needs to react dynamically when the record data is updated via another component on the page. Which decorator should be used on the JavaScript property to receive reactive updates?
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
✓
@wire
The @wire decorator in Lightning Web Components provisions a stream of data to a property or function reactively.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
@api
Why it's wrong here
@api marks properties as public API fields exposed to parent components, but does not wire data automatically.
- ✓
@wire
Why this is correct
@wire connects a property or function to a Salesforce wire service adapter, updating reactively when underlying data changes.
- ✗
@track
Why it's wrong here
@track makes private property mutations reactive within the component, but is not used for wire service data.
- ✗
@readonly
Why it's wrong here
@readonly is an Apex annotation, not a JavaScript decorator for Lightning Web Components.
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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.