A three-tier client/server configuration has advantages over single-tier or two-tier configurations including simpler scalability and the ability to perform load balancing between application servers. The dispatcher process receives user requests on the AS ABAP and passes them to available work processes. Work process types on an AS ABAP system include dialog, update, background, enqueue, and spool processes. The server process, software deployment manager, and dispatcher belong to the AS Java architecture. ABAP and Java are programming languages that are platform independent, while the JVM executes Java bytecode across hardware architectures.

1. 1. What are the advantages of a three-tier client/server configuration as compared<br />to a single-tier or two-tier configuration?<br />Choose the correct answer(s).<br />□ A Simpler scalability<br />□ B Simpler administration<br />□ C Load balancing possible<br />□ D None of the above<br />Answer: A, C<br />2. Which AS ABAP process receives the user request?<br />Choose the correct answer(s).<br />□ A Work process<br />□ B Dispatcher<br />□ C Server process<br />□ D SAPGUI<br />Answer: B<br />3. Which work process types are there in an AS ABAP system?<br />Choose the correct answer(s).<br />□ A Dialog work process<br />□ B Message Server<br />□ C Update work process<br />□ D Internet Communication Manager (ICM)<br />□ E Background work process<br />□ F Enqueue work process<br />□ G Spool work process<br />Answer: A, C, E, F, G<br />4. Which of the following processes belong to AS Java?<br />Choose the correct answer(s).<br />□ A Server (process)<br />□ B Internet Communication Manager (ICM)<br />□ C Software Deployment Manager (SDM)<br />□ D Dispatcher<br />□ E Java Connector (JCo)<br />Answer: A, C, D<br />2008 © 2008 SAP AG. All rights reserved. 167<br />Test Your Knowledge TADM10_1<br />5. Which of the programming languages listed below are implemented<br />platform-independently?<br />Choose the correct answer(s).<br />□ A Fortran<br />□ B ABAP<br />□ C Java<br />□ D C/C++<br />Answer: B, C<br />6. Briefly describe the function of the Java Virtual Machine (JVM).<br />Answer: The JVM executes the platform-independent bytecode generated by<br />the Java compiler on the relevant hardware.<br />Answers<br />1. What are the advantages of a three-tier client/server configuration as compared<br />to a single-tier or two-tier configuration?<br />Answer: A, C<br />Implementing an additional hardware layer for application processes makes it<br />easier to adapt an SAP system if the number of users changes (scalability), and<br />to assign user groups to specific application servers (software-oriented view),<br />(load balancing). The additional hardware layer does not, however, reduce<br />the administrative workload.<br />2. Which AS ABAP process receives the user request?<br />Answer: B<br />The dispatcher receives the user request on the AS ABAP and passes it on to<br />an available work process. The SAP presentation program, SAP GUI, is not<br />part of the application server (software-oriented view), and the server process<br />is an AS Java process.<br />3. Which work process types are there in an AS ABAP system?<br />Answer: A, C, E, F, G<br />All of the above processes can principally be configured on an AS ABAP.<br />However, not all of the above processes are work processes. The message server<br />and ICM process are not work processes.<br />4. Which of the following processes belong to AS Java?<br />Answer: A, C, D<br />The ICM is not an AS Java process but an AS ABAP process. The Java<br />Connector is part of AS Java but is not an independent process.<br />5. Which of the programming languages listed below are implemented<br />platform-independently?<br />Answer: B, C<br />ABAP and Java are programming languages that are implemented<br />platform-independently.<br />6. Briefly describe the function of the Java Virtual Machine (JVM).<br />Answer: The JVM executes the platform-independent bytecode generated by<br />the Java compiler on the relevant hardware.<br />