SAP ABAP Modularization Programming Interview Questions, in this post we are going to provide realtime interview questions on ABAP Programming Modularization techniques. These questions are helpful for the freshers and also for the 2+,3+ experienced ABAP Programmers. Refer this post for more details and interview questions on Modularization Programming. Click on read more to read this article.
MODULARIZATION Programming Interview Questions
SAP ABAP Modularization Programming Interview Questions, in this post we are going to provide realtime interview questions on ABAP Programming Modularization techniques. These questions are helpful for the freshers and also for the 2+,3+ experienced ABAP Programmers. Refer this post for more details and interview questions on Modularization Programming.
1. Does every ABAP/4 have a modular structure?
Yes.
2. What is Modularization and its benefits?
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.
3. Name the ABAP/4 Modularization techniques.
· Source code
module.
· Subroutines.
· Functions.
4. How can we create callable modules of program
code within one ABAP/4 program?
· By defining Macros.
· By creating include programs in the
library.
5. M is the attribute type of the module program.
6. Is it possible to pass data to and from
include programs explicitly?
No. If it is required to pass data to and from
modules it is required to use subroutines or function modules.
7. What are subroutines?
Subroutines are program modules,
which can be called from other ABAP/4 programs or within the same program.
8. What are the types of Subroutines?
· Internal Subroutines: The source
code of the internal subroutines will be in the same ABAP/4 program as the
calling procedure (internal call).
· External Subroutines: The source
code of the external subroutines will be in an ABAP/4 program other than the
calling procedure.
9. It is not possible to create an ABAP/4
program, which contains only Subroutines (T/F).
False.
10. A subroutine can contain nested form and
endform blocks. (T/F)
False.
11. Data can be passed between calling programs and
the subroutines using Parameters.
12. What are the different types of parameters?
Formal
Parameters:
Parameters, which are defined during the definition of subroutine
with the
FORM statement.
Actual
Parameters:
Parameters which are specified during the call of a subroutine with
the
PERFORM statement.
13. How can one distinguish between different kinds
of parameters?
· Input parameters are used to pass
data to subroutines.
· Output parameters are used to pass
data from subroutines.
14. What are the different methods of passing data?
· Calling by reference: During a
subroutine call, only the address of the actual parameter is transferred to the
formal parameters.
The formal parameter
has no memory of its own, and we work with the field of the calling program
within the subroutine. If we change the
formal parameter, the field contents in the calling program also changes.
· Calling by value: During a
subroutine call, the formal parameters are created as copies of the actual
parameters.
The formal parameters have
memory of their own. Changes to the
formal parameters have no effect on the actual parameters.
· Calling by value and result: During
a subroutine call, the formal parameters are created as copies of the actual
parameters.
The formal parameters have
their own memory space. Changes to the
formal parameters are copied to the actual parameters at the end of the subroutine.
15. The method by which internal tables are passed
is By Reference.
16. How can an internal table with Header line and
one without header line be distinguished when passed to a subroutine?
Itab[] is used
in the form and endform if the internal table is passed with
a header line.
17. What should be declared explicitly in the
corresponding ABAP/4 Statements to access internal tables without header lines
& why?
Work Area. This is required as the
Work Area is the interface for transferring data to and from the table.
18. A
subroutine can be terminated unconditionally using EXIT. (T/F)
True.
19. A subroutine can be terminated upon a condition
using CHECK Statement.
20. Function
Modules are also external Subroutines. (T/F).
True.
21. What is the difference between the function
module and a normal ABAP/4 subroutine?
In contrast to normal subroutines
function modules have uniquely defined interface. Declaring data as common parts is not
possible for function modules. Function
modules are stored in a central library.
22. What is a function group?
A function group is a collection
of logically related modules that share global data with each other. All the modules in the group are included in
the same main program.
When an ABAP/4
program contains a CALL FUNCTION statement, the system loads the entire
function group in with the program code at runtime. Every function module belongs to a function
group.
23. What is the disadvantage of a call by
reference?
During a call by reference damage
or loss of data is not restricted to the subroutine, but will instantly lead to
changes to the original data objects.
24. A
function module can be called from a transaction screen outside an ABAP/4
program. (T/F).
True.
25. What is an update task?
It is an SAP provided procedure
for updating a database.
26. 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.
27. The function modules are created and stored in
the Function Library.
28. When
a function module is activated syntax checking is performed automatically. (Y/N)
True.
29. 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.
30. What is the difference between internal tables
and extract datasets?
· The lines of an internal table
always have the same structure. By using extract datasets, you can handle
groups of data with different structure and get statistical figures from the
grouped data.
· You have to define the structure of
the internal table at the beginning. You need not define the structure of the
extract dataset.
· In contrast to internal tables, the
system partly compresses exact datasets when storing them. This reduces the
storage space required.
· Internal tables require special
work area for interface whereas extract datasets do not need a special work
area for interface.
31. It is possible to assign a local data object
defined in a subroutine or function module to a field group. (T/F).
False.
32. What is the difference between field-group
header and other field groups?
The header field group is a
special field group for the sort criteria.
The system automatically prefixes any other field groups with the header
field group.
33. Can a filed occur in several field groups.
Yes. But it leads to unnecessary data redundancy.
34. When sorting the extract dataset the fields
used as default sort key lie in the Header field group.
35. What does the insert statement in extract
datasets do?
It defines the
fields of a field group.
36. What does the extract statement do in extract
datasets?
The data is written to virtual
memory by extract commands.
37. A field-groups statement or an insert statement
reverses storage space and transfers values. (T/F).
False.
38. While using extract datasets it is required to
have a special workarea for interface (T/F)
False.
39. The LOOP-ENDLOOP on extract datasets can be
used without any kind of errors (T/F)
False. It causes runtime errors.
40. The Maximum no of key fields that can be used
in a header is 50.
41. While sorting field groups we cannot use more
than one key field (T/F).
False.
42. While sorting, if the main storage available is
not enough, the system writes data to an external help file. The SAP profile parameter, which determines
this help file, is DIR_SORTTMP.
43. The extract statements in field groups can be
used before or after processing the sort statements. (T/F)
FALSE.
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