ABAP SQL and native SQL are two methods of executing SQL statements within ABAP programs in SAP systems. ABAP SQL, also known as Open SQL, offers certain features not available with native SQL:
* B. Database independence:ABAP SQL provides a level of abstraction from the underlying database system, allowing developers to write database-agnostic code. This means that the same ABAP SQL code can run on any database supported by SAP, such as SAP HANA, Oracle, or Microsoft SQL Server, without modification. This database independence simplifies code maintenance and enhances portability across different SAP system environments.
* D. Use of the AS ABAP data buffer:ABAP SQL leverages the application server's data buffering capabilities, which can significantly improve performance by reducing database access. When data is read using ABAP SQL, it can be retrieved from the buffer if it has been accessed recently, instead of making a round trip to the database. This feature is particularly beneficial for frequently accessed, read-intensive data, contributing to reduced database load and faster data retrieval.
These features underscore the advantages of using ABAP SQL for database operations within ABAP programs, offering enhanced portability, performance, and ease of use in a multi-database SAP landscape.

In an embedded deployment of SAP S/4HANA, Object Pages utilize the OData protocol (A) to access and interact with the SAP S/4HANA system. OData (Open Data Protocol) is an open protocol that allows the creation and consumption of queryable and interoperable RESTful APIs in a simple and standard way. It is extensively used in SAP Fiori applications for seamless communication between the SAP Fiori front-end and the SAP S/4HANA back-end, enabling efficient data retrieval, updates, and other CRUD operations on the system data.