SALESFORCE-PD1 User Interface Practice Question
A developer is using the Lightning Message Service and needs to unsubscribe from a message channel when a component is destroyed. In which lifecycle hook should unsubscribe be called?
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
✓
disconnectedCallback
disconnectedCallback is used for cleanup tasks like unsubscribing from message channels or removing event listeners when a component is removed from the DOM.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
connectedCallback
Why it's wrong here
Used for setup/subscription.
- ✗
constructor
Why it's wrong here
Used for initial instantiation.
- ✓
disconnectedCallback
Why this is correct
Used for cleanup and unsubscription.
- ✗
renderedCallback
Why it's wrong here
Used for post-render DOM updates.
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.