Interview Q & A Page - 7

BASIS / NETWEAVER INTERVIEW QUESTIONS AND ANSWERS

              

Page - 7

61..Explain  about two services  that are  used to deal with  communication in 

SAP?

Message Service: Used by the application servers to exchange short internal messages, all system communications.
Gateway Service: Enables communication between Basis and external applications using CPI-C protocol.

62..Which SAP processes are started when the SAP system or an instance is started?

A..SAPOSCOL

B..Message Server

C..Gateway Server

SAPOSCOL is an underlying process that should always be running, even if the

SAP system is shut down. START_SAP_NOW and LAUNCH_DB are made

up. The message server is started once for each SAP system, and the gateway

server is started once for each instance.

63..How are the SAP Roll area and Page area set in the SAP system?

You can view ST02 to view the current values as below

The following parameters are used to set the available size of the SAP Roll area and Page area.

rdisp/ROLL_MAXFS....Total amount of Roll (Filesystem+SHM) set in 8KB block

rdisp/ROLL_SHM......Shared memory element of Roll and set in 8KB blocks

rdisp/PG_MAXFS......Total amount of Page (Filesystem+SHM) set in 8KB block

rdisp/PG_SHM........Shared memory element of Page and set in 8KB blocks

Be aware that the file system amount is equal to MAXFS value minus the SHM value.

60MB or so each in memory should be sufficient for both SAP Page and Roll area's.   

Use SAP transaction RZ11 Profile Parameter Maintenance to set the values. You should monitor the roll and paging usage after this to ensure that more than 80% of each is never used as starting to use the paging and roll files very regularly when buffers are exhausted would have some system performance implications. You can check the history of each instance's usage of these areas by double-clicking on the values from the initial screen of ST02.

64..which methods is it possible to create users in child systems in the
 context of active CUA?

A.. In the central system with transaction SU01, Systems tab page.

B.. In the central system with transaction SU01, Roles tab page

If you are using CUA, you can only create users in child systems using

transaction SU01 in the central system. The creation of users is possible using

the Systems, Roles, and Profiles tab pages.

65..What  is the  protocol used  by the NetWeaver  Gateway process?

SAP NetWeaver Gateway is a technology that provides a simple way to connect devices, environments and platforms to SAP software based on market standards. The framework enables development of innovative people centric solutions bringing the power of SAP business software into new experiences such as social and collaboration environments, mobile and tablet devices and rich internet applications.

The software offers the following capabilities:

OPEN - Any Device, Any Experience, Any Platform

     PEOPLE - Optimized for user interaction scenarios

    TIMELESS - Non disruptive, any SAP Business Suite version

    DEVELOPERS - Simple APIs, no SAP knowledge, any tool

    STANDARDS - Based on REST, ATOM/OData

66..What are all the different  types of  Log records in  SAP Basis?

Transaction code SM21 is used to check and analyze system logs for any critical log entries. The SAP System logs is the all system errors, warnings, user locks due to failed log on attempts from known users, and process messages in the system log.

1. From the initial screen, go to System Log -> Choose -> All remote system logs. Set the date a day before and click on Reread system log.

2. In the system log analysis window, you can check/analyze the critical error message by double clicking to it.

The list can be restricted for Problems Only, Problems and message and All messages. The information in this list can further used to analyze the errors which are indicated with Red sign under Priority. Also we get information of Tcode that was used by the user when the error got generated. There are to two different types of logs created by the system log:

A.. Local Logs

B.. Central Logs

67..What are the types of  update requests in  SAP?

There are two types of request :

A.. Customization request

B.. workbench Request.

68..How SAP GUI handles output screen  for the user?

The SAP front-end s/w can either run on the similar computer or on dissimilar computers given for that purpose.  User terminal input is accepted by the SAP terminal program SAP GUI, changed to SAP proprietary format and sent to the SAP dispatcher.  The dispatcher coordinates the information exchange among the SAP GUIs and the work processes

69..What is the difference  between  system  Trace, Developer Trace, and  system Log in SAP?

Basically, Tracing is a complete set of information (messages) which allows you to monitor the performance of an instance of a component and the user activity that occurs in that component. Traces may allow you to determine whether your component or application is working efficiently and as expected, even as your application, component, and environment change

System Trace:

If you want to record the internal SAP system activities, use the function SAP System Trace. Recording the processes in your application server enables you to monitor the system and facilitates troubleshooting. 

Developer Trace:

Developer traces contain technical information for use in the event of problems with your system. Using the entries in the developer traces requires a sophisticated knowledge of the host systems in which your SAP system is running and of the SAP system itself.

System Log:

You can use the log to pinpoint and correct errors occurring in your system and its environment.

70..What  are Homogenous system copy and Heterogeneous system copy? How  you will do that?

When a homogeneous system copy is  performed, the target SAP system is installed  on the same operating system and the same  database system as the source SAP system.  The contents of the database are copied from  the source to the target system. During a  heterogeneous system copy, the operating  system or the database system is changed.  Migration is a synonym for heterogeneous  system copy