Pass the Salesforce Developers CRT-450 Questions and answers with ValidTests

The error message 'Maximum trigger depth exceeded' occurs when a trigger invokes itself recursively more than the allowed limit.

Option C: The trigger is getting executed multiple times.

Correct Answer.

Explanation:

This error indicates that the trigger is recursively calling itself.

This can happen if the trigger performs an update or insert operation that causes the same trigger to fire again, leading to an infinite loop.

Salesforce enforces a limit on the recursion depth to prevent stack overflows.

Executing Anonymous Apex code is useful for running ad-hoc operations or administrative tasks in Salesforce.

Option A: To run a batch Apex class to update all Contacts

Valid Use Case.

Explanation:

Anonymous Apex can be used to initiate a batch Apex job.

The developer can write code in the Execute Anonymous window to instantiate and execute the batch class.

Example:

Database.executeBatch(new UpdateContactsBatchClass());

In Aura Components, application events are fired by invoking the fire() method on the event instance.

Option D: fire()

Correct.

Explanation:

To fire an application event, you first get the event instance using cmp.getEvent("eventName") and then call fire() on it.

Example:

var appEvent = $A.get("e.namespace:eventName");

appEvent.setParams({ "param1" : value1 });

appEvent.fire();

To integrate Order__c records with the ERP system after their status is set to 'Placed', and considering that orders may be uploaded in bulk, the developer should:

Option D: Callout from a Queueable class called from a trigger

Explanation:

Trigger: Implement an after-update trigger on Order__c to detect when the status changes to 'Placed'.

Queueable Apex: Use Queueable Apex to handle asynchronous processing and callouts. Queueable classes support callouts by implementing the Database.AllowsCallouts interface.

Benefits:

Handles Bulk Data: Queueable Apex can process records in batches and can be chained for processing large volumes.

Supports Callouts: Unlike future methods, Queueable Apex allows for more complex data types and supports callouts with fewer limitations.

To embed a Flow into an Aura component, you use the lightning:flow component.

Option A: lightning

Correct Answer.

The lightning:flow component allows you to embed a Flow in an Aura component.

Example Usage:

<aura:component>

</aura:component>

Since Case and Defect__c have Private organization-wide defaults (OWD), users need explicit access to the parent records to access the child records in a master-detail or junction object relationship.

The Case_Defect__c is a junction object between Case and Defect__c.

Option C: Share the parent Case and Defect__c records.

Correct Answer.

Explanation:

To access a record on a junction object (Case_Defect__c), a user must have access to both parent records.

Sharing both the Case and Defect__c records with the user will grant them access to the Case_Defect__c record.

To make a Lightning Web Component (LWC) available in Salesforce Classic, you can embed it in a Visualforce page using Lightning Out.

Option D: Use the Lightning Out JavaScript library to embed the Lightning Web Component in a Visualforce page and add to the page layout.

Lightning Out allows LWCs to be embedded in Visualforce pages.

The Visualforce page can then be included in Salesforce Classic interfaces.

Why Not Other Options:

Option A: Visualforce components cannot directly contain LWCs.

Option B: Wrapping an LWC in an Aura component and surfacing it as a Visualforce tab doesn't make it available on page layouts.

Option C: You cannot invoke an LWC from a Visualforce page using an Apex method call.

References:

Lightning Out for Visualforce:

"Lightning Out is a feature that extends Lightning components to any web page. Use it to embed Lightning web components in a Visualforce page."— Lightning Web Components Dev Guide: Use Lightning Web Components in Visualforce Pages