Free Salesforce PDI Practice Exam with Questions & Answers | Set: 6

Before-save Apex Trigger:

This is the best solution because abefore-save triggerruns before the record is saved to the database, providing an opportunity to validate or modify the data.

In this case, the Apex trigger can validate the email address using a regular expression or a third-party API call to ensure the email address is valid. If the email is invalid, an error message can be displayed using addError().

Why not the other options?

A. Submit a REST API Callout with a JSON payload:

REST callouts are more complex and generally not recommended for simple validation tasks like email format validation. Additionally, callouts cannot be performed directly in a before-save trigger.

C. Use a custom Lightning Web Component (LWC):

LWCs are primarily for UI interactions and should not be used to enforce data validations that are server-side requirements.

D. Use an Approval Process:

Approval Processes are for managing the approval flow of records, not for real-time validations. They cannot enforce email validation directly.

TheLimitsclass in Apex provides methods to check the consumption of governor limits, such as the number of SOQL queries, DML statements, and heap size used.

Example:

Integer dmlStatements = Limits.getDMLStatements();

Integer dmlLimit = Limits.getLimitDMLStatements();

Not Suitable:

Option A:OrgLimitsis not an Apex class.

Option C:Messagingdeals with email and messaging operations.

Option D:Exceptionis for handling exceptions, not tracking resource usage.

Limits Class

To embed a Flow in an Aura component, thelightning:flowtag is used. It allows developers to interact with flows declaratively in Aura components.

The Lightning Out library allows a Lightning Web Component to be embedded in a Visualforce page. This approach is the most suitable to make the LWC accessible in Salesforce Classic.

Validation Rule Violations:

Salesforce automatically throws exceptions for validation rule violations during DML operations.

<apex:messages>is used to display these errors to the user.

Why Not Other Options?

A: Controller attributes alone cannot handle validation messages.

B: A try/catch block does not address validation rule violations effectively.

D:Database.upsert()method is not related to validation error handling.

Maximum Trigger Depth Exceeded:

This error occurs when a trigger causes recursive calls, leading to an infinite loop of execution.

Solution:

Use static variables in helper classes to prevent recursive trigger execution.

Example:

public class TriggerHelper {

public static Boolean isTriggerExecuted = false;

}

trigger AccountTrigger on Account (after update) {

if (!TriggerHelper.isTriggerExecuted) {

TriggerHelper.isTriggerExecuted = true;

// Trigger logic here

}

}

Why Not Other Options?

A: Permissions do not affect trigger recursion.

B: Length of the trigger is unrelated to recursion.

C: Code coverage does not influence runtime errors like recursion.

When an Account record is created, the following happens:

Before insert triggerincrements the count field once.

After insert record-triggered flowexecutes and increments the count again.

When the record is subsequently updated:

Before update triggerincrements the count again.

After update record-triggered flowincrements it once more.

Thus, the final value of thecountfield =4.

Order of Execution in Salesforce

Lightning Web Components (LWCs) have access to a variety of resources in Salesforce. Below are the supported resources:

Static Resources (A):You can use static resources to reference JavaScript libraries, images, and other files needed in an LWC.

Pagination using aStandardSetControllerhelps manage large datasets by loading only a subset of records at a time. This approach minimizes view state size, which is critical for handling large datasets like 10,000+ records.

Whyupsert?

Theupsertstatement inserts records that don’t exist and updates existing records based on the external ID (Order Number__cin this case).

Salesforce automatically recognizes and uses the external ID field for matching.

Why Not Other Options?

A and B:mergeis for merging records, not for upserting.

C: Adding the field name afterupsertis unnecessary, as Salesforce detects the external ID automatically.