SAP R/3 Architecture

SAP R/3 ARCHITECTURE QUESTIONS

1. What guarantees the integration of all application modules?

The R/3 basis system guarantees the integration of all application modules. The R/3 basis s/w provides the run time environment for the R/3 applications ensures optimal integration, defines a stable architectural frame for system enhancements, and contains the administration tools for the entire system.One of the main tasks of the basis system is to guarantee the portability of the complete system.

2. What are the central interfaces of the R/3 system?

Presentation Interface.

Database Interface.

Operating system Interface.

3. Which interface controls what is shown on the p.c.?

Presentation Interface.

4. Which interface converts SQL requirements in the SAP development system to those of the database?

Database Interface.

5. What is SAP dispatcher?

SAP dispatcher is the control agent that manages the resources for the R/3 applications.

6. What are the functions of dispatcher?

Equal distribution of transaction load to the work processes.

Management of buffer areas in main memory.

Integration of the presentation levels.

Organization of communication activities.

7. What is a work process?

A work process is where individual dialog steps are actually processed and the work is done. Each work process handles one type of request.

8. Name various work processes of R/3 system?

Dialog or Online (processes only one request at a time).

Background (Started at a specific time)

Update (primary or secondary)

Enque (Lock mechanism).

Spool (generated online or during back ground processing for printing).

9. Explain about the two services that are used to deal with communication.

Message Service: Used by the application servers to exchange short internal messages, all system communications.

Gateway Service: Enables communication between R/3 and external applications using CPI-C protocol.

10. Which work process triggers database changes?

Update work process.