Interview Questions & Answers for SAP ABAP.
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.
11.
Define service (within R/3)?
A service is
a process or group of processes that perform a specific system function and
often provide an application-programming interface for other processes to call.
12.
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 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 characterize the user.
13.
What are the different layers in R/3 system?
Presentation
Layer.
Application
Layer.
Database
Layer.
14.
What are the phases of background processing?
Job
Scheduling.
Job
Processing.
Job Overview.
15.
What components of the R/e system initiate the start of background jobs at the
specified time?
The batch
scheduler initiates the start of background job. The dispatcher then
sends this request to an available background work process for processing.
16.
Define Instance.
An instance
is an administrative unit in which components of an R/3 systems 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 separate buffer areas.
17.
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.
18.
What are R/3 Basis configurations?
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
separate computers.
19.
What is a Service in SAP terminology?
A service
refers to something offered by a s/w component.
20.
What is Server in SAP terminology?
A component
can consist of one process or a group and is then called the server for the
respective service.
21.
What is a client in SAP terminology?
A S/W
component that uses the service (offered by a s/w component) is called a
Client. At the same time these clients may also be servers for other
services.
22.What
is a SAP system?
The union of
all s/w components that are assigned to the same databases is called as a SAP
system.
23.
What is the means of communications between R/3 and external applications?
The means of
communication between R/2,R/3 and external applications is via the CPI-C
handler or SAP Gateway, using the CPI-C Protocol.
24.
What is the protocol used by SAP Gateway process?
The SAP
Gateway process communicates with the clients based on the TCP/IP Protocol.
25.
Expand CPI-C.
Common
Program Interface Communication.
26.
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 places in the Tem Se (Temporary Sequential objects).
27.
What are different types of Log records?
V1 and
V2. V1 must be processed before V2. But, we can have more than one
V2 logs.
28.
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 is less critical are placed in V2 components. If a V1
update fails, V2 components will not be processed.
29.
Dialog work processes perform only one dialog step and then available for the
next request.
30.
Explain what is a transaction in SAP terminology.
In SAP
terminology, a transaction is series of logically connected dialog steps.
31.
Explain how SAP GUI handles output screen for the user.
The SAP
front-end s/w can either run on the same computer or on different computers
provided for that purpose. User terminal input is accepted by the SAP terminal
program SAP GUI, converted to SAP proprietary format and sent to the SAP
dispatcher. The dispatcher coordinates the information exchange between
the SAP GUIs and the work processes. The dispatcher first places the
processing request in request queues, which it then processes. The
dispatcher dispatches the requests one after another, to the available work
process. The actual processing takes place in the work process.
When processing is complete, the result of a work process is returned via the
dispatcher to the SAP GUI. The SAP GUI interprets the received data and
generates the output screen for the user.
1.
What is full form of BDC Session?
Batch Data
Communication Session.
2.
What are the steps in a BDC session?
The first
step in a BDC session is to identify the screens of the transaction that the
program will process. Next step is to write a program to build the BDC
table that will be used to submit the data to SAP. The final step is to
submit the BDC table to the system in the batch mode or as a single transaction
by the CALL TRANSACTION command.
3.
How do you find the information on the current screen?
The
information on the current screen can be found by SYSTEM à STATUS command from
any menu.
4.
How do you save data in BDC tables?
The data in
BDC tables is saved by using the field name ‘BDC_OKCODE’ and field value of
‘/11’.
5.
What is the last entry in all BDC tables?
In all BDC
tables the last entry is to save the data by using the field name BDC_OKCODE
and a field value of ‘/11’.
6.
What is a multiple line field?
A multiple
line field is a special kind of field which allows the user to enter multiple
lines of data into it.
7.
How do you populate data into a multiple line field?
To populate
data into a multiple line field, an index is added to the field name to
indicate which line is to be populated by the BDC session (Line index).
8.
Write the BDC table structure.
BDC table
structure
FIELD
TYPE
DESCRIPTION
Program
CHAR
(8)
Program name of transaction.
DynPro
CHAR
(4)
Screen number of transaction.
DynBegin
CHAR
(1)
Indicator for new screen.
Fnam
CHAR
(35)
Name of database field from screen.
Fval
CHAR
(80)
Value to submit to field.
9.
Does the CALL TRANSACTION method allow multiple transactions to be processed by
SAP?
No.
The CALL TRANSACTION method allows only a single transaction to be processed by
SAP.
10.
Does the BDC-INSERT function allow multiple transactions to be processed by SAP?
Yes.
11.
What is the syntax for ‘CALL TRANSACTION’?
CALL
TRANSACTION trans [using bdctab MODE mode].
Three
possible entries are there for MODE.
A
- Show all screens.
E
- Show only screens
with errors.
N
- Show no screens.