Client concept In SAP

What is the Client concept in SAP? What is the meaning of Client independent?

In commercial, organizational and technical terms, the client is a self contained unit in the R3 system, with separate set of Master data and its own set of Tables.

When a change is made in one client all other clients are affected in the system - this type of objects are called Client independent objects.

What is a variant and where do you use it?

What is a variant and where do you use it?

            If you want to run a report program with same selections at regular intervals (for example, for monthly sales statistics), you would not want to enter the same values each time. So, ABAP/4 offers you a possibility to combine the desired values for all these selections in one selection set. You can create as many different selection sets as you like for each report program and they remain assigned only to the report program in question. Such a selection set is called a variant.

Using Variants Online

Using Variants in Background Processing

Online, starting a report via variant saves the user work,minimizes input errors. In background processing, a variant is the only possibility you have to pass values for the selections.

To fill certain selections with values that change according to the application, you use a variant, which takes the variable values from Table TVARV.

In Module pools POV, POH

What are the events by which we can program “help texts” and display “possible values lists” ?

-     PROCESS ON HELP-REQUEST (POH)

-     PROCESS ON VALUE-REQUEST (POV).

SAP BASIS Layer Questions

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

-       Presentation  interface

              Database  interface

       Operating  system  interface

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

·             Presentation  interface

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

·             Database  interface

What  is   SAP  dispatcher ?

-     SAP   dispatcher is  the  control  agent  which  manages  the

resources   for  the  R/3  applications. 

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  activies    C111

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.

Name  various  work  processes  of  R/3  system ?

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

       2)  Background ( started  at  a  specified  time )

       3)  Update ( primary  or  secondary )

       4)  Enque(  lock  mechanism )

5) Spool ( generated  online  or  during  back  ground  processing For  printing )

6)      Message server

7)      ICM

What are the types of Update requests ?

-     An update request can be divided into one primary (V1) and several Secondary update components (V2). Time-critical operations are placed in V1 component and those whose timing are less critical are placed in V2 components. If a V1 update fails, V2 components will not be processed.

What  are  the  roll  and  page  areas  ?

-     Roll  and  page  areas  are  SAP  R/3  buffers   used  to  store

user  contexts  ( process  requests ) .  The  SAP  dispatcher  assigns

process  requests  to  work  processes  as  they  are  received.  If

the  work  process  is  unavailable   the  process  requests  are  queued  in  the  roll  and  page  areas.

Paging area holds data from the application programs.

Roll area holds data from previous dialog steps and data that characterizes user.

What is a Spool request ?

-     Spool requests are generated during dialog or background processing and placed in the spool database with information about the printer and print format. The actual data is placed in the Tem Se (Temporary Sequential objects).

 

What are the different database integrities ?

·         Semantic integrity

-     Relational integrity

-     Primary key integrity

-     Value set integrity

-     Foreign key integrity and

-     Operational integrity.