Which of the following API types does SAP recommend to use to achieve clean core...

To achieve clean core integrations in SAP SuccessFactors, SAP recommends using modern, standardized API protocols that minimize customizations and ensure compatibility with cloud-based systems.

According to the SAP SuccessFactors Integration Guide:

OData(Option A): OData APIs are the preferred method for integrating with SAP SuccessFactors, including Onboarding, due to their flexibility, scalability, and support for real-time data access. They align with clean core principles by reducing the need for custom middleware.

SOAP(Option C): SOAP APIs are also supported for certain SuccessFactors integrations, particularly for legacy systems or specific use cases requiring structured data exchange. They are considered clean core-compliant when used appropriately.

Option B (RFC) and Option D (IDoc) are incorrect because they are older, on-premise-focused protocols primarily used in SAP ERP systems, not recommended for clean core integrations in SuccessFactors cloud environments.