Which method is used for implementing SOA callouts?

The correct choice highlights the use of embedded JavaScript and Apex as the method for implementing Service-Oriented Architecture (SOA) callouts. This approach allows developers to leverage the capabilities of both JavaScript and Apex to create more dynamic and responsive applications that can make external service calls.

By embedding JavaScript, developers are able to enhance the user experience with asynchronous requests, while Apex serves as the server-side integration layer to handle logic and data processing. Together, these technologies facilitate efficient callouts to external systems while ensuring that the Salesforce platform remains secure and performant.

This method is particularly advantageous because it provides the flexibility of client-side processing with JavaScript, which can handle user interactions and UI updates without requiring a full page reload. It complements Apex's robust capabilities for processing the results and interacting with Salesforce’s database.

Utilizing JavaScript and Apex for SOA callouts also aligns with modern web development practices, enabling developers to implement RESTful services or SOAP services more effectively within their Salesforce applications. The combination maximizes the functionality and responsiveness of the application while maintaining a robust architecture that adheres to SOA principles.