PD1 User Interface 4

Question 1

A developer must prevent a Lightning Web Component from being dropped onto App Builder pages by non-admin users. Which configuration achieves this?

Accepted Answer

Set isExposed to false in js-meta.xml

Answer

Setting false in the js-meta.xml file hides the component from App Builder entirely.

Question 2

In LWC, how do you pass data from a parent component to a child component?

Accepted Answer

Set the child's @api property via an HTML attribute on the child's element in parent markup

Answer

Parent-to-child data flow in LWC uses HTML attributes on the child tag that map to @api-decorated properties in the child component.

Question 3

Which statement correctly describes the Locker Service in Salesforce Lightning?

Accepted Answer

It isolates component JavaScript so components cannot access each other's DOM or globals directly

Answer

Locker Service enforces component isolation by wrapping DOM access and JS globals in secure proxies, preventing cross-component DOM access.

Question 4

A Visualforce page uses a custom controller. The developer wants to access the record ID of the current page. Which approach is correct?

Accepted Answer

Use ApexPages.currentPage().getParameters().get('id') in the controller

Answer

ApexPages.currentPage().getParameters().get('id') retrieves the 'id' URL parameter, which Salesforce automatically appends when navigating to a standard record page.

Question 5

In an LWC template, what syntax correctly renders a list of items from a 'contacts' property?

Accepted Answer

Answer

LWC uses for:each and for:item directives on a <template> tag; each child element must also carry a unique key attribute.

(PD1) Salesforce Certified Platform Developer 1 Practice Test

(PD1) Salesforce Certified Platform Developer 1 Practice Test

PD1 User Interface 4