PD1 User Interface 2

Question 1

Which Lightning Web Component lifecycle hook is called after every render of the component?

Accepted Answer

renderedCallback()

Answer

renderedCallback() fires after each render cycle, making it suitable for DOM manipulation after rendering.

Question 2

In a Lightning Web Component, which decorator is used to expose a property so that parent components can set its value?

Accepted Answer

@api

Answer

@api makes a property or method publicly accessible to parent components and in markup.

Question 3

What is the correct way to call an Apex method imperatively in a Lightning Web Component?

Accepted Answer

Import the Apex method and call it as a JavaScript function

Answer

Imperative Apex calls require importing the method from the Apex namespace and calling it as a standard JS function returning a Promise.

Question 4

Which attribute in a Lightning Web Component's JS-meta.xml file controls where the component can be placed by admins in Lightning App Builder?

Accepted Answer

targets

Answer

The <targets> element specifies which Lightning App Builder page types (e.g., recordPage, homePage) can host the component.

Question 5

In Visualforce, which tag renders a standard Salesforce page layout for a specific object record?

Accepted Answer

<apex:detail>

Answer

<apex:detail> renders the standard detail view page layout for the record associated with the page's controller.

(PD1) Salesforce Certified Platform Developer 1 Practice Test