SALESFORCE-PD1 User Interface Practice Question
A developer needs to catch unhandled JavaScript errors in a Lightning Web Component hierarchy so the entire app doesn't crash. Which lifecycle hook handles errors thrown by descendant components?
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
✓
errorCallback
errorCallback() is invoked when a descendant component throws an error in any of its lifecycle hooks or event handlers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
errorCallback
Why this is correct
Catches errors from child components.
- ✗
catchCallback
Why it's wrong here
Not a valid LWC hook.
- ✗
disconnectedCallback
Why it's wrong here
Used for cleanup when removing components.
- ✗
faultCallback
Why it's wrong here
Not a valid LWC hook.
About these practice questions
This SALESFORCE-PD1 question is part of Courseiva's 493-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.