SALESFORCE-PD1 User Interface Practice Question
A developer is troubleshooting lifecycle hooks and rendering behavior in a Lightning Web Component. Which THREE statements are correct regarding LWC lifecycle execution order? (Choose THREE)
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
✓
The constructor() is invoked before the component is inserted into the DOM.
Constructor runs first, then connectedCallback, then renderedCallback after render.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The constructor() is invoked before the component is inserted into the DOM.
Why this is correct
Correct because the constructor initializes the component instance before DOM insertion.
- ✗
renderedCallback() only executes once during the lifetime of the component.
Why it's wrong here
Incorrect because renderedCallback executes after every render cycle.
- ✓
connectedCallback() is invoked when the component is inserted into the DOM.
Why this is correct
Correct because connectedCallback runs upon insertion into the DOM.
- ✓
disconnectedCallback() is invoked when the component is removed from the DOM.
Why this is correct
Correct because disconnectedCallback handles teardown when removed from the DOM.
- ✗
renderedCallback() is invoked before connectedCallback().
Why it's wrong here
Incorrect because rendering happens after connection.
About these practice questions
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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
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