CRT-450 Exam Dumps - Salesforce Certified Platform Developer I (SU24)

ISV Package Development:

The ISV is developing a managed package.

They have an Apex class BodyFat with a method calculateBodyFat().

Requirement:

Ensure calculateBodyFat() is accessible by consumers outside the package namespace.

Solution:

To allow methods in a managed package to be accessible outside the package namespace, they must be declared as global.

Option B: Declare the class and method using the global access modifier.

Correct Approach.

Explanation:

Global Classes and Methods:

In managed packages, only classes and methods declared as global are accessible outside the package namespace.

Declaration:

global class BodyFat {

global void calculateBodyFat() {

// method implementation

}

}

Important Notes:

Public classes and methods in managed packages are accessible only within the namespace.

Global is required to expose the functionality to subscribers.

To create a custom user interface component that allows users to enter information about their accounts and validate user input before saving, the best technology is:

Option A: Lightning Web Components

Lightning Web Components (LWC):

LWC is a modern UI framework built on web standards, providing efficient performance and a rich set of base components.

Input Validation:

LWCs support client-side validation using standard HTML5 validation and custom validation logic.

Developers can use JavaScript to validate user input before saving data to the database.

User Experience:

LWCs provide a responsive and interactive user experience, which is essential for data entry components.

Using Database.insert with allOrNone=false allows partial success in DML operations.

Option D: Use the Database method with allOrNone set to false.

Records that cause errors are not inserted.

Successful records are committed.

Prevents the entire batch from failing.

Why Not Other Options:

Option A: Deactivating the trigger is not practical.

Option B: Removing the class from the profile may cause other issues.

Option C: A try-catch block won't prevent the batch from failing.

References:

Database Methods:

"Use the Database DML methods to specify whether or not to allow partial record processing."— Apex Developer Guide: Using the Database Class

To troubleshoot query performance issues:

Option B: Developer Console

Explanation: The Developer Console provides tools like the Query Plan to analyze SOQL queries for performance.

Using Query Plan Tool:

Open Developer Console.

Go to the Query Editor.

Enter your SOQL query.

Click on "Explain" to see the query plan.

To meet the given requirements, we need a relationship that allows:

Calculating the total amount on an Order.

This can be achieved using roll-up summary fields on the Order object to sum up values from its Line Item child records.

Roll-up summary fields are only available on the master object in a master-detail relationship.

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.