Get Certified: Proven Methods to Pass the Salesforce CRT-450 Exam

The recommended process for deploying code and configurations from a Sandbox to Production is to use a change set.

Option C: Use a change set to deploy the Apex code and Lightning Components.

Explanation: Change sets are the standard mechanism provided by Salesforce for deploying customizations between connected orgs (e.g., Sandbox to Production). They support deploying Apex classes, Lightning components, and configurations.

To associate multiple Engineering_Support__c records to a single Opportunity and display aggregate information on the Opportunity:

Option B: Master-detail field from Engineering_Support__c to Opportunity

Explanation:

Master-Detail Relationship: Creating a master-detail relationship from Engineering_Support__c (detail) to Opportunity (master) allows multiple support records to be related to one Opportunity.

Aggregate Information: Master-detail relationships support roll-up summary fields, enabling aggregate calculations (like COUNT, SUM) on the Opportunity object based on related Engineering_Support__c records.

Option C: Handle low-level events in the event handler and re-fire them as higher-level events.

True.

Explanation:

It's a best practice to encapsulate lower-level events and re-emit them as higher-level, application-specific events to decouple components and simplify event handling.

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.

Option C: Update the PrimaryId__c field definition to mark it as an External Id.

Correct Answer.

Explanation:

Marking PrimaryId__c as an External ID allows data loading tools to match records based on this field.

This facilitates upserting data and ensures that the CSV data correctly maps to existing records.

When deploying Apex code to a production environment, certain requirements must be met regarding test coverage and annotations.

Option B: Apex classes must have at least 75% code coverage org-wide.

Correct Requirement.

Explanation:

Salesforce requires that all Apex classes and triggers have a combined code coverage of at least 75% before deployment to production.

This means that, across all Apex code in the org, at least 75% of the code must be covered by test methods.

To calculate the sum of all Order Line item totals on the Order record in a master-detail relationship, the best practice is to use a Roll-up Summary Field.

Roll-up Summary Field: This field type allows you to perform calculations on a set of related records, such as summing up the total price of all Order Line items related to an Order.

"Roll-up summary fields allow you to display a value in a master record based on the values of fields in a detail record."— Salesforce Help: Define Roll-Up Summary Fields

Master-Detail Relationship: Since Order Line items are in a master-detail relationship with Orders, roll-up summary fields can be created on the master object (Order) to summarize data from the detail object (Order Line).

"You can create roll-up summary fields on any custom object that is on the master side of a master-detail relationship."— Salesforce Developer Guide: Roll-Up Summary Fields

Why Not Other Options:

A. Quick Action: Quick actions are used to create records, log calls, send emails, etc., and are not suitable for calculating and displaying aggregate data.

B. Apex Trigger: While triggers can perform the calculation, using them for this purpose is not considered best practice when declarative solutions like roll-up summary fields are available.

"Use declarative functionality (roll-up summary fields) for maintaining aggregates instead of triggers."— Salesforce Developer Guide: Best Practices for Triggers

D. Formula Field: Formula fields cannot aggregate data from child records to parent records unless they are part of a roll-up summary field in a master-detail relationship.

Conclusion: Using a roll-up summary field is the most efficient and recommended approach to sum the total prices of all Order Line items on the Order record.

To allow partial success when inserting a list of records, the developer should use the Database class methods with the allOrNone parameter set to false.

Option B: Database.insert(records, false)

Correct Answer.

Explanation:

The Database.insert() method allows for partial processing.

By setting the second parameter (allOrNone) to false, the operation will attempt to insert all records.

If some records fail, the successful ones will be committed, and the errors can be examined from the result.

Usage:

Database.SaveResult[] results = Database.insert(records, false);

for (Database.SaveResult sr : results) {

if (sr.isSuccess()) {

// Record inserted successfully

} else {

// Handle errors

for (Database.Error err : sr.getErrors()) {

System.debug(err.getMessage());

}

}

}

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.