SALESFORCE-PD1 User Interface Practice Question
A developer is troubleshooting a Lightning Web Component where data returned from an Apex wire adapter needs to be mutated before being rendered. What is the correct pattern to handle this?
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
✓
Create a shallow copy or clone of the wire data object in a getter or property assignment before mutation.
Data returned by wire adapters is immutable (frozen). To mutate it, the developer must create a shallow copy of the data object.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Decorate the wire property with @api mutable to allow direct writes.
Why it's wrong here
Incorrect because no such decorator modifier exists.
- ✗
Use the eval() function to strip immutability constraints from the prototype chain.
Why it's wrong here
Incorrect because eval() is unsafe and prohibited.
- ✓
Create a shallow copy or clone of the wire data object in a getter or property assignment before mutation.
Why this is correct
Correct because cloning the immutable wire object allows modification.
- ✗
Directly assign new properties to the object returned by the wire adapter property.
Why it's wrong here
Incorrect because wire adapter data is immutable and direct assignment will throw an error in strict mode.
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.