SALESFORCE-PD1 User Interface Practice Question
A developer is creating a Lightning Web Component and needs to style a child component from a parent component across the shadow DOM boundary. What feature enables custom styling hooks?
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
✓
Using CSS custom properties (variables) defined by the component.
CSS custom properties (CSS variables) defined with --slds or custom component variables can pierce the shadow DOM if exposed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Using CSS custom properties (variables) defined by the component.
Why this is correct
Styling hooks allow developers to style shadow DOM elements via CSS custom properties.
- ✗
Setting style attributes directly via JavaScript on child elements.
Why it's wrong here
Violates encapsulation and is not recommended for structural styling.
- ✗
Using global CSS stylesheets
Why it's wrong here
Global CSS does not penetrate the LWC shadow DOM encapsulation by default.
- ✗
Using the >>> combinator selector
Why it's wrong here
Deep combinators are deprecated and removed in modern shadow DOM standards.
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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.