The @TestVisible annotation allows private methods or variables to be accessed in test classes. This ensures that the private method can be adequately tested without changing its access modifier.

To override the Account's standard Edit button in Lightning Experience, a Lightning action can be created and associated with the object. This action can include custom logic or a Lightning component.

* Why Queueable Class?
* Queueable Apex supports callouts and allows chaining to process one record at a time efficiently.
* The trigger detects when the Order__c status changes to "Placed" and enqueues the Queueable class to perform the callout.
* Why Not Other Options?
* B. Batchable class: Batch jobs are ideal for bulk processing but not suited for single REST callouts.
* C. Flow with invocable method: Flows are less efficient and limited in handling callouts for large- scale operations.
* D. @future method: While it supports asynchronous callouts, it does not allow chaining, making Queueable more suitable.
* Queueable Apex: https://developer.salesforce.com/docs/atlas.en-us.apexcode.meta/apexcode
/apex_queueing_jobs.htm
References:

* Why Lightning Pages?
* The Lightning Component framework is designed for building responsive Lightning Pages.
* Allows for dynamic and modular development.
* Why Not Other Options?
* A: Salesforce Classic does not support Lightning Components.
* C: JavaScript buttons are replaced by Quick Actions in Lightning Experience.
* D: While integrations are possible, the framework is not primarily used for integrations.
* Lightning Components Overview: https://developer.salesforce.com/docs/component-library
/documentation/en/lwc
References:

To make an LWC available for use on a record page:
* Target Configuration:
* Add <target>lightning__RecordPage</target> in the component's .js-meta.xml file to specify where the component can be used.
* Expose the Component:
* Set isExposed to true in the .js-meta.xml file to make the component available for use.
Example .js-meta.xml File:<?xml version="1.0" encoding="UTF-8"?>
<LightningComponentBundle xmlns="http://soap.sforce.com/2006/04/metadata">
<apiVersion>57.0</apiVersion>
<isExposed>true</isExposed>
<targets>
<target>lightning__RecordPage</target>
</targets>
</LightningComponentBundle>
* A: Incorrect placement. The <target> tag must be in the .js-meta.xml file, not the JavaScript file.
* D: The <masterLabel> tag is used for metadata labeling, not for exposing or targeting a component.
* LWC Metadata Configuration: https://developer.salesforce.com/docs/component-library/documentation
/en/lwc/lwc.create_metadata_config_file
Why Not the Other Options?References: