Use BatchApexErrorEvent for notifications. It's automatically triggered for unhandled exceptions in

batch Apex. No need for manual publishing. External systems can subscribe to this event to receive

notifications.

Reference: Batch Apex

Bulk-safe triggers use collections to aggregate DML operations. This practice minimizes the number

of DML statements, which is essential for bulk processing.

Reference: Apex Developer Guide - Bulk Trigger Best Practices

Custom metadata is best for storing configurable settings. It's deployable, packageable, and

upgradeable. Allows different configurations for different instances.

Reference: Custom Metadata Types

The <apex:actionStatus> tag in Visualforce is used to display the status of an AJAX request, such as showing different text while a command button is processing an action. Reference: Visualforce Developer Guide - apex:actionStatus

To make the test pass, @isTest(SeeAllData=true) should be used to allow the test to access historical

data from the org. This is required because field history tracking data is not copied to a test context,

so you need to allow the test to access live data to assert against it.

Reference: Apex Developer Guide - IsTest Annotation

The correct order in tests with callouts is Test.startTest(), then Test.setMock(), followed by the

method invocation, and finally Test.stopTest(). This ensures the mock callout is used.

Reference: Apex Developer Guide - Testing HTTP Callouts

To troubleshoot the issue of a trigger creating two order records, adding System.debug() statements

in the trigger and analyzing the log output in the Developer Console is an effective technique. This

will help identify if the trigger is being called more than once or if there is another automation (such

as a flow or workflow) causing the additional record creation.

Reference: Salesforce Developer Guide - Debugging

Salesforce CLI with Salesforce DX is the best tool for managing a source-driven deployment process.

It facilitates version control, scriptable deployment, and rollback, and is optimized for collaboration

and continuous integration.

Reference: Salesforce DX Developer Guide

To make the Aura component responsive, the developer should set multipleRows="true" to allow the

layout items to wrap onto multiple rows on smaller devices. Additionally, setting the size attribute for

different device sizes ensures that the layout adapts to the screen width.

Reference: Lightning Components Developer Guide - lightning:layout

The correct SOQL query to retrieve all fields for a specific Account is to use the FIELDS(ALL) function

within the SELECT clause of the SOQL query. This will return all fields for the Account named 'Acme'.

Reference: SOQL and SOSL Reference Guide - FIELDS() Function