Cds Views, Abap On Hana, Core Abap, Interfaces IDoc BAPI RFC Web Services REST SOAP, Background Jobs, Debugger ST05 SAT ATC STMS, Fiori UI5 integration, CDS-based OData, Classical Reports ALV development, S 4HANA best practices, Object-Oriented ABAP, OData Services development using SEGW, Debugging and performance optimization, Enhancements User Exits BADIs Enhancement Framework