PDI Exam Dumps - Salesforce Certified Platform Developer 1 (WI25)

Given that Trainer__c has a lookup field to Gym__c, to retrieve the record for the 'Viridian City Gym' and all its trainers, the correct SOQL query is:

Option A:

SELECT Id, (SELECT Id FROM Trainers__r) FROM Gym__c WHERE Name = 'Viridian City Gym'

Parent-to-Child Query (Subquery):

To retrieve child records (trainers) from the parent record (gym), you perform a subquery using the child relationship name.

Child Relationship Name:

For a lookup relationship, the child relationship name can be found in the relationship settings.

By default, if the lookup field on Trainer__c is Gym__c, the child relationship name is Trainers__r.

Query Breakdown:

SELECT Id, (SELECT Id FROM Trainers__r) FROM Gym__c WHERE Name = 'Viridian City Gym'

Selects the Gym record and all related Trainers.

Why Other Options Are Incorrect:

Option B: (SELECT Id FROM Trainer__c)

Trainer__c is an object, not a relationship name, so the subquery is incorrect.

Option C: SELECT ID FROM Trainer__c WHERE Gym__r.Name = 'Viridian City Gym'

This query retrieves Trainer records, not the Gym record and its trainers as specified.

Option D: (SELECT Id FROM Trainers__c)

Trainers__c is incorrect; the child relationship name should end with __r in subqueries.

The Apex test fails in the Test Runner but succeeds in the Execute Anonymous window because the test method relies on existing data in the sandbox.

Isolation of Test Data: By default, Apex tests do not have access to pre-existing data in the organization. Tests are executed in an isolated context to ensure they are not dependent on external data, promoting reliability and repeatability.

"Apex test methods don’t have access to pre-existing data in the organization. The test methods have access to all data that they create and to changes made by other test methods (unless the @IsTest(Isolated=true) annotation is used)."— Apex Developer Guide: Isolation of Test Data from Organization Data in Unit Tests

Execute Anonymous Window: When code is run in the Execute Anonymous window, it executes in the current user's context and has access to all organization data, including existing records.

"All Apex code runs in system mode. The only exception is anonymous blocks, such as code executed using the Execute Anonymous window or the SOAP API."— Apex Developer Guide: Enforcing Object and Field Permissions

Solution: To fix the failing test, the developer should create the necessary test data within the test method or use the @IsTest(SeeAllData=true) annotation if access to existing data is absolutely necessary (though this is generally discouraged).

"If you specify @IsTest(SeeAllData=true), the test method has access to all data in the organization, but the test can be slower and less reliable because it might depend on data that changes."— Apex Developer Guide: Using the SeeAllData Annotation

Why Other Options Are Incorrect:

Option A: While calling an @future method requires special handling in tests, it would not cause the method to pass in Execute Anonymous and fail in tests.

Option C: A syntax error would prevent the code from compiling, so it wouldn't run in either context.

Option D: Using System.runAs is only necessary when testing code that behaves differently for users with different profiles or permissions.

Conclusion: The discrepancy arises because the test method is attempting to access data that isn't available in the test context, leading to its failure in the Test Runner but success in the Execute Anonymous window.

When a Lightning component needs to execute a complex SOQL query that joins two objects, and such queries are not supported directly in Lightning components, the solution is to use an Apex controller method.

Option C: Invoke an Apex class with the method annotated as @AuraEnabled to perform the query.

Correct Approach.

Explanation:

The Lightning component can call an Apex method annotated with @AuraEnabled.

The Apex method can perform the complex SOQL query and return the results to the component.

For integrating automated tests into a Continuous Integration (CI) process, the Universal Containers development team should use the Salesforce CLI.

Option C: Salesforce CLI

Salesforce CLI (Command Line Interface) is a powerful command-line tool that allows developers to script and automate various Salesforce tasks, including running tests, deploying code, and retrieving metadata.

Automated Testing:

Developers can use the sfdx force:apex:test:run command to run Apex tests and include it in their CI scripts.

Example Command:

sfdx force:apex:test:run --testlevel RunLocalTests --resultformat human --outputdir test-results

Option C: Standard controller and the recordSetVar page attribute

Correct Answer.

Explanation:

Using the recordSetVar attribute with a standard controller enables the Visualforce page to access a set of records selected from a list view.

This allows users to edit multiple records.

When comparing Lightning Web Components (LWC) with Visualforce for the View layer in the MVC paradigm, several advantages stand out.

Option A: Self-contained and reusable units of an application

Correct Advantage.

Explanation:

LWCs are built using modular components that encapsulate their own structure, style, and behavior.

Components can be reused across different parts of the application, promoting consistency and reducing development time.

This modularity allows for better maintainability and scalability.

Scenario:

Objects Involved:

Job__c (Master)

Job_Application__c (Detail)

Contact (Related via Master-Detail relationship on Job_Application__c)

Fields:

Preferred_Locations__c (Multi-select picklist on Job__c)

MailingState (Field on Contact)

Requirement:

On Job_Application__c, display whether the Contact's MailingState matches any value in Preferred_Locations__c on the related Job__c.

Keep this value in sync if changes occur to the Contact's MailingState.

Solution:

Option C: Formula field

Correct Approach.

Explanation:

Create a Formula Field on Job_Application__c that compares the Contact's MailingState with the Job's Preferred_Locations__c.

Since Job_Application__c is a detail of Job__c and has a lookup to Contact, the formula can reference fields from both related objects.

Use the INCLUDES() function to check if the MailingState is among the selected values in Preferred_Locations__c.

Sample Formula:

INCLUDES(Job__r.Preferred_Locations__c, Contact__r.MailingState)

This formula returns a Boolean (TRUE or FALSE) indicating whether there's a match.

Benefits:

Real-Time Calculation: Updates automatically when either field changes.

No Code Required: Declarative solution using formula fields.

Maintenance: Easy to manage and update if needed.