SAP ABAP Modularization Techniques, in ABAP/4 programming environment we use modularization techniques very frequently. It's a very good programming practice to use modularization techniques in our SAP ABAP applications. Modularization techniques provides better understandability, readability, and for better maintainability of our ABAP applications. We use subroutines, include programmes, and functions very often. Here we are going to provide real time interview questions on SAP ABAP Modularization Techniques. Refer this post to know more about this SAP Modularization. Click on read more to explore.
SAP-ABAP Modularization Techniques Real Time Interview Questions-2
SAP ABAP Modularization Techniques, in ABAP/4 programming environment we use modularization techniques very frequently. It's a very good programming practice to use modularization techniques in our SAP ABAP applications. Modularization techniques provides better understandability, readability, and for better maintainability of our ABAP applications. We use subroutines, include programmes, and functions very often. Here we are going to provide real time interview questions on SAP ABAP Modularization Techniques. Refer this post to know more about this SAP Modularization.
ABAP Modularization Techniques Interview Questions Part-1 : Click Here
Part-2 Starts here:
16. What happens if a
function module runs in an update task?
The system performs the module processing
asynchronously. Instead of carrying out the call immediately, the system waits
until the next database update is triggered with the
‘COMMIT WORK’
command.
17. The function
modules are created and stored in the Function Library.
18. When a function
module is activated syntax checking is performed automatically. (Y/N)
True.
19. What is the use
of the RAISING exception?
The raising exception
determines whether the calling program will handle the exception itself or leave the
exception to the system.
20. What are the
Componentents of functional modules?
•Importing parameters
•Exporting parameters
•Changing parameters
•Tables parameters
•Exceptions
21. what are the 2
includes creaated automatically whenever we create a function module?
Ans:
1) Lfm_nameTOP
2) Lfm_nameUXX
22.What are the
different Processing Types of Function Modules?
Ans:
The different
types of function modules are:
a) Normal function modules
b) Remote enabled function modules
c) Update function modules
23.What are the
various ways of raising exceptions in fuction modules?
Ans:
There are two
ABAP statements for raising exceptions. They can only be used in function
modules:
1)RAISE <except>.
2)MESSAGE..... RAISING <except>.
The effect of these
statements depends on whether the calling program handles the exception or not.
If the name <except> of the exception or OTHERS occurs in the EXCEPTIONS
addition of the CALL FUNCTION statement, the exception is handled by the
calling program.
If the calling program does not handle the exception .The
RAISE statement terminates the program and switches to debugging mode. The
MESSAGE ..... RAISING statement display the specified message.
How the
processing continues depends on the message type. If the calling program
handles the exception, both statements return control to the program.
No values
are transferred. The MESSAGE ..... RAISING statement does not display a
message.Instead, it fills the system fields SY-MSGID, SY-MSGTY, SY-MSGNO, and
SY-MSGV1 to SY-MSGV4.
24.What are the
difference between Function Modules and Form Routines?
Ans:
There are
significant differences between function modules and form routines:
1)Function modules must belong to a pool
called a function group.
They possess a fixed interface for data
exchange. This makes it easier for you to pass input and output parameters to and from
the function module. For example, you can assign default
values to the input parameters.
2)The interface also supports exception
handling.
This allows you to catch errors and pass them back to the calling program for handling.
3 )They use their own memory area.
The
calling program and the function module cannot
exchange data using a shared memory area - they must use the function
module interface. This
avoids unpleasant side effects such as accidentally overwriting data.
4)The Function Builder allows you to
develop, test, and document new function modules. You can also use it to display information
about existing function modules.
25. Explain the
following tabs appearing in SE37:
a) import
b) export
c)
changing
d)
tables
e)
exceptions
f)source code
Ans:
a)import:
Contains
a list of the formal parameters that are used to pass data to a
function module. For
further information, refer to Displaying Information about Interface Parameters .
b)export:
Contains a list of the formal
parameters that are used to receive data from a function module. For
further information, refer to Displaying Information about Interface Parameters
c)changing:
Contains a list of the formal
parameters that are used both to pass data to
and receive data from
a function module. For further information, refer to Displaying Information about
Interface Parameters .
d) tables:
Specifies the tables that are to
be passed to a function module. Table
parameters are always
passed by reference. For further information, refer to Displaying Information about
Interface Parameters
e)exceptions:
Shows how the function module
reacts to exceptions. For further
information, refer to
Displaying Information about Interface Parameters
f)source code:
Program code of the
function module.
26) What are the
steps invloved in documenting a function module?
ans:
1)Open the
Function Builder and enter the name of the function module that you want to document.
2)Select Interface.
3)Choose Change.
4)Choose the Documentation tab.
5)A list of all parameters and exceptions
appears.
6)Enter a short text for each entry.
7)Save your entries.
27) What is the difference between Function
module and BAPI ?
Ans:
Each Bapi
Object has Interface, Key Fields, Attributes,Methods and Events.
Bapi Function Modules can be attached to these Bapi objects .Function module has a single bound functionality while a BAPI object can contain many functionalities.
28) Explain the ways
in which UPDATE FUNCTION MODULE is used in a BDC?
Ans:
Function modules that run in the update task can run synchronously or asynchronously. You determine this by the form of the commit statement you use:
- COMMIT WORK
- This is the standard form, which specifies
asynchronous processing. Your program does not wait for the requested
functions to finish processing.
- COMMIT WORK AND WAIT
- This form specifies synchronous processing. The commit statement waits for the requested functions to finish processing. Control returns to your program after all high priority (V1) function modules have run successfully.
- The AND WAIT form is convenient for switching old programs to synchronous
processing without having to re-write the code. Functionally, using AND
WAIT for update-task updates is just the same as dialog-task updates with
PERFORM ON COMMIT.
29 What
is Modularization and its benefits?
Ans.
If the program contains the
same or similar blocks of statements or
it is required to process the same function several times, we can
avoid redundancy by using modularization
techniques. By modularizing the ABAP/4 programs we make them easy to read and improve their structure.
Modularized programs are also easier to maintain and to update.
30)
What is the difference between macro and
subroutine?
Ans .
Macros can only be used in the program they
are defined in and only after the definition are expanded at
compilation/generation. Subroutines (FORM) can be called from both the program
they are defined in and other programs .
A MACRO is more or less an
abbreviation for some lines of code that are used more than once or twice. A FORM is a local subroutine (which can be
called external). A FUNCTION is (more or less) a subroutine that is called
external.
Since debugging a MACRO is not really possible, prevent the use of
them (I’ve never used them, but seen them in action). If the subroutine is used
only local (called internal) use a FORM.
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