SALESFORCE-PD1 User Interface Practice Question
A developer is working with a Lightning Web Component that uses the @wire decorator to provision data from an Apex method. The Apex method depends on a property that changes dynamically. How should the property be prefixed to signal reactivity to the wire service?
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
✓
Prefix the property name with a dollar sign ($)
Properties passed to a @wire adapter that are reactive must be prefixed with a dollar sign ($).
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enclose the property name in curly braces ({})
Why it's wrong here
Incorrect. Curly braces are used for expressions in HTML templates, not JavaScript wire adapters.
- ✓
Prefix the property name with a dollar sign ($)
Why this is correct
Correct. Prefixing a property with $ informs the wire service to re-run when the property value changes.
- ✗
Prefix the property name with an ampersand (&)
Why it's wrong here
Incorrect. Ampersands are not used for wire reactivity.
- ✗
Prefix the property name with an underscore (_)
Why it's wrong here
Incorrect. Underscores do not signal reactivity to the wire service.
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.