14-05-07 ABAP FAQ's

->Define Instance.
An instance is an administrative unit in which components of an R/3 system providing one or more services are grouped together. The services offered by an instance are started and stopped at random. All components are parameterized using a joint instance profile. A central R/3 system consists of a single instance in which all necessary SAP services are offered. Each instance uses a seperate buffer areas.

From hardware perspective, every information system can be divided into three task areas Presentation, Application Logic and Data storage.
The R/3 Basis software is highly suitable for use in multi-level client/server architectures.

->What are R/3 Basis configurations ?
Ans) A central system with centrally installed presentation software.
Two-level client/server system with rolled out presentation software
Two-level client/server system. Presentation and Application run on the same computer.
Three-level client server system. Presentation, application and database each run on seperate computers.

->What is a Service in SAP terminology ?
Ans) A service refers to something offered by a software component.

->What is a Server in SAP terminology ?
Ans) A component can consist of one process or a group of processes and is then called the server for the respective service.

->What is a client in SAP terminology ?
Ans) A software component that use the service (offered by a software component) is called a Client. At the same time these clients may also be servers for other services.

->What is a SAP System ?
Ans) The union of all software components that are assigned to the same database is called as a SAP system.