PDI Practice Test Questions

Explanation:
C. Event Bubbling (Propagation) Behavior
By default, custom events in LWC do not bubble up the DOM (unlike standard DOM events).
A custom event only propagates to the component that dispatched it (the host) and its immediate parent (container).
If you want an event to bubble up the component hierarchy, you must set bubbles: true when creating the event.
D. Passing Data in the Payload (detail Property)
Custom events in LWC use a detail property to pass data in the payload.
Example:
javascript
const event = new CustomEvent('notify', {
detail: { message: 'Hello World' } // Data is passed here
});
this.dispatchEvent(event);
The parent component can access the data via event.detail.

✅ Explanation:
Change Sets are the recommended deployment method when moving customizations (like Apex code, Lightning Components, configurations, etc.) between related Salesforce orgs, such as from Sandbox to Production.

Why A. Change Set is correct:
Designed specifically for deploying between environments that are in the same Salesforce org family (e.g., a Developer Sandbox to Production).

UI-based and user-friendly—ideal for admins and developers.
Supports most metadata types including Apex classes, Lightning Components, Custom Objects, Workflows, etc.
Ensures proper dependency resolution and validation before deploying.

Explanation?

@AuraEnabled is the required annotation to expose an Apex method to Lightning Web Components (LWC) or Aura Components.
(cacheable=true) is needed when the method is used with @wire in an LWC, because:
Wire methods require cacheable=true to avoid errors.
It enables client-side caching, improving performance by preventing unnecessary server calls.
Example Usage:

Apex Class:
java
public with sharing class MyApexController {
@AuraEnabled(cacheable=true)
public static List getAccounts() {
return [SELECT Id, Name FROM Account LIMIT 10];
}
}

LWC JavaScript (Wire Example):
javascript
import { LightningElement, wire } from 'lwc';
import getAccounts from '@salesforce/apex/MyApexController.getAccounts';
export default class MyComponent extends LightningElement {
@wire(getAccounts)
accounts;
}

✅ Explanation:
Marking the field as Required at the field definition level (i.e., in the object schema) is the most efficient and reliable way to ensure that every time a record is created or updated, a value must be provided for the Food_Preference__c picklist field.

Benefits:

Enforced universally—regardless of whether the record is created via UI, API, Apex, Flow, or any integration.
No need for additional logic or validation rules.
Ensures data integrity at the database level.

✅ Explanation:

In this scenario:
One Applicant can apply to multiple Jobs.
One Job can have multiple Applicants.
This is a many-to-many relationship, and the best way to model that in Salesforce is with a junction object.
A Junction Object:

Is a custom object that has two master-detail relationships:

One to the Applicant object
One to the Job object
Each record in the junction object represents a single application of one Applicant to one Job.
This allows tracking additional data per application (e.g., application date, status, interview notes).

Explanation:
Business Requirement:
Compare the Contact's MailingState with the Job's Preferred_Locations__c (multi-select picklist).
Automatically sync this comparison result whenever the Contact's address or Job's preferred locations change.
Why Record-Triggered Flow?
Real-time updates: Fires when a Contact or Job record is created/updated.
Can query related records: Access the Job_Application__c, Job__c, and Contact fields.
Flexible logic: Can check if MailingState is in Preferred_Locations__c (using INCLUDES for multi-select).
Low-code: Easier to maintain than Apex triggers.

Step-by-Step Explanation:

A. Upload the SVG as a static resource
Go to Setup → Static Resources and upload the SVG file.
This makes the SVG accessible in Lightning Web Components (LWC).
B. Import the static resource and provide a getter in JavaScript
In your LWC’s JavaScript file, import the static resource and create a getter to expose it:
javascript
import { LightningElement } from 'lwc';
import mySvg from '@salesforce/resourceUrl/mySvgResource'; // Static resource name
export default class MyComponent extends LightningElement {
get svgUrl() {
return mySvg; // Returns the path to the SVG
}
}
C. Reference the getter in the HTML template
Use the getter in the HTML to display the SVG (e.g., in an tag):
html

💡 Explanation:
The for loop runs from i = 0 to i = 200, inclusive, which means 201 iterations total.
On each iteration, the line insert acct; is executed.
Therefore, the same Account record is being inserted 201 times, which will cause a runtime error unless the Account object is cloned or has a unique Name or required fields.

Explanation:
VS Code (with Salesforce Extensions) is the modern, recommended tool for Lightning Web Component (LWC) development because:

It provides real-time error checking, code completion, and debugging tools specific to LWC.
It integrates seamlessly with Salesforce CLI for deploying and retrieving metadata.
It supports source tracking and version control (Git).

✅ VS Code (B) is the best choice for fixing LWC bugs efficiently.
🚫 Avoid Force.com IDE (C) (outdated) and Developer Console (A) (too limited).
Bonus: Steps to Debug LWC in VS Code
Install VS Code + Salesforce Extension Pack.
Use SFDX: Retrieve Source to pull the component from the sandbox.
Debug using Chrome DevTools (for runtime issues) or LWC linter (for syntax errors).
Deploy fixes with SFDX: Deploy to Sandbox.

✅ ✅ B (VS Code) is the correct and modern approach.

✅ Explanation:

To make an Apex method accessible to a Lightning Web Component (LWC), it must be decorated with the @AuraEnabled annotation.
When migrating from JavaScript Remoting (used with Visualforce) to LWC:
You should:
Add @AuraEnabled to your Apex method.
Ensure the method is public static.
Return data types supported by LWC (e.g., List, Map, primitives).
public with sharing class OpportunityController {
@AuraEnabled
public static List getOpportunities() {
return [SELECT Id, Name, Amount FROM Opportunity LIMIT 10];
}
}
import getOpportunities from '@salesforce/apex/OpportunityController.getOpportunities';