diffr abap.docx

7/27/2019 diffr abap.docx

http://slidepdf.com/reader/full/diffr-abapdocx 1/7

Most frequently asked interview DIFFERENCES

1.sapscript and smartforms

Sap script is client dependent and smart form is client independent.

Smartforms has Only 1 main window while Sap script has 99 main windows You can not print labels using smart forms

2.BDC and LSMW

In BDC we have to take care of field mapping whereas field mapping is taken care by

sap in lsmw.

BDC is mostly used for customised data upload while LSMW is used for uploading

Master data.

In BDC we need to write large code but in LSMW small coding is needed.

3. BADI and BAPI

BADI is business add ins, it is used to customize the standard business flow

BAPI is Business application programming interface. It is nothing but Remote

enabled function module which can be called from outside the SAP System.

4.user exit and customer exit

User exit is an include program given by SAP in that you can write your code , It

needs Access key from SAP while key is not required in case of customer exit

5. Select single and select up to one row

Select single will fetch only one record while select up to n row. Will fetch n rows

from database

6. Normal (Classical) report and ALV report

To display the output in classical report you use WRITE Statement.

To display the output in ALV we have different function modules and class like

REUSE_ALV_GRID_DISPLAY , REUSE_ALV_LIST_DISPLAY and

CL_SALV_TABLE. If you run the classical report in background after JOB finished you can see it’s output

which stored in spool, While in case of ALV you need code extra to store the output

as it will not generate the spool.

7. ALV list display and ALV grid display

You cannot retrieve the output for the report which is displayed using ALV GRID

Display.As spool Request will not be created for the same. While in case of list

display Report out put will be there in spool request.

8. Classical and drill down report



In classical report user cannot interact with report whereas in drill down report user

can interact with report.

Drill down facility is not provided in classical report while in drill down it is

provided.

If they ask you in detail then tell the interviewer that interact with the report means in

drill down report we have one basic list and 20 secondary lists so we can directly goto 5th list or 10th list as per our requirement similarly we can come back to any list.

Drill down means showing data in basic list first and when we double click on any

field we get summarised list. NOTE:- to go to next list in drill down report use

following syntax SY-LSIND = < list number> example: to go to 15th list SY-LSIND

= 15 to come to 5th list from 15th list use F3 KEY OR PRESS BACK BUTTON

9. BAPI and RFC function module

BAPI is nothing but remote enabled function module

BAPI is provided as a method of business objects

10.sap 4.7 and ECC 6.0

SAP 4.7 is based on Web AS

ECC 6.0 is based of Netweaver 7.0.

11. get cursor and hide in interactive report

Get cursor will provide the location cursor position in the report

While hide is use to pass the data from basic list to secondary list

12.normal function module and RFC

You cannot call normal function module from outside the current system while RFC

function module can be called from outside the SAP system.

13. Subroutine and function modules.

Subroutine is local to the program while function module is global.

To call subroutine from outside its main program you need to write its main program

name in the bracket

14.At selection screen and At selection screen output.

At selection screen output is called first

All dynamic commands and screen modification is done in AT selection screen

output.

15.direct input and batch input

The basic difference is validation is not done in direct input by pre defined function

while in batch input it is coved.

16.synchronous and asynchronous in BDC



Synchronous mode will wait until the BDC session gets over while asynchronous

mode will not wait for that

17.at selection screen and at selection on field name

At selection screen is used to validate the whole screen elements while at selectionfield is used to validate the particular field.

When you display the error message in at selection on field the focus will be on that

particular field while in case of At selection screen the focus will not be on any

particular field.

18. PBO and PAI event in module pool

Process Before Output and Process after input.

PBO will be called before the screen is displayed to the user while process after input

is called once user interact with screen.

19. Stop , check and exit

If you use the STOP statement within an event block, the system stops processing the

block Immediately.

If you use the EXIT statement within an event block but not in a loop, the system

stops Processing the block immediately

If you use the CHECK <expr> statement within an event block but not within a loop,

and the Condition <expr> is not fulfilled, the system exits the processing block

immediately. <expr> can be any logical expression or the name of a selection table. If

you specify a selection table and the contents of the corresponding table work are do.



20.free and refresh in internal table

You can use FREE to initialize an internal table (along with header line ) and release

its memory space. REFRESH will only initialize an internal table (along with header line)

21.clear and delete.

The major difference is clear is used with internal table while delete is used with

database table.

22. collect and sum

COLLECT <line> INTO <itab>. The statement first checks whether the internal tablecontains an entry with the same key. If not,it acts like INSERT. If there is already a



table entry with the same key, COLLECT does not inserta new line. Instead, it adds

the values from the numeric fields of the work area <line> to thevalues in the

corresponding fields of the existing table entry.

SUM.Can only be used in loops through internal tables. Calculates the sums of the

numeric fields in alllines of the current control level and writes the results to the

corresponding fields in the workarea.

23. call transaction and session method

Call transaction is Synchronous Processing while session (classical) method is

Asynchronous Processing

In call transaction we can update the database both synchronously and

asynchronously. We can specify the mode in the program. While in session method it

is Synchronous Database update.

In call transaction No batch input processing log is maintained while in session

method details log is maintained.

Call Transaction method is faster than the session method.

24. at first and at last control break event

As the name suggest AT FIRST executed for the first time while AT LAST executed

in last.

25. Enhancement point and Enhancement Section

Both the enhancement-point and section are available for you to change standard SAP

code. Difference is in fact that you use Enhancement-point to add ABAP code to

standard SAP and enhancement-section to replace/extend standard SAP code.

26.end of page and top of page

Top of page trigger when report encounter the first write, skip or new-line statements.

End of page trigger when page size is over or report display gets over.

27. Table and structure

Table has physical definition into the underline database while structure does exist

physically in the data base.

28. table and views

Table has data init while view does not contain data in it. Both exist in the data base.

when u run the view it queries the database and gives the respective data.

29.inner joins and for all entries

Inner join joins the table at database level whereas For..All..Entries joins the table at

application level.

In For..All..Entries when the condition gets satisfied data is fetched in one single shotfrom database table whereas in inner join data is fetched iteration by iteration



It is always good programming practice to join tables at application level because if

we join tables at database level then there might be performance issue

30. Transparent table pool table and cluster table

Transparent Table: Exists with the same structure both in the dictionary and databaseexactly with same data and fields. it’s to store transaction data. It’s one to

one Relation table

Pool tables: These are logical tables must be assigned to a table pool when they are

defined. Its use to store control data. its many to one relation table

Clustered tables: these also logical tables and must be assigned to table cluster when

they are defined. It’s also used to store control data, temporary data or text ex.,

documentation. It’s also many to one relation table.

31. Top of page and top of page during line selection

Top of page is triggered for the basic list while top of page at line selection triggers atsecondary list.

32. Start_form and End_form in sap script

start_form function module is called if we want to use different forms with similar

characteristics in a single spool request ,it must be closed by END_FORM function

module

33. open dataset and close dataset

Open dataset is use to read / write file into application server while close dataset is use

to close that file.

34. data element and domains

Domain gives technical details like length , decimal etc..while data elements gives

description and business details

35. set screen and call screen

Set screen <no> set the next screen value and temporarily override the next screenvalue in screen attribute. While call screen <no> jump to the screen specified in <no>.

36. Internal Session and External Session

External session is nothing but the window you have opened in your screen .By

Default you can open 6 external sessions( 6 windows = you can increase it via basis’s

setting). Internal session is created when you call any Functional module or any other

task in your program. counts for internal sessions are 9.

37. Elementary and collective search help



An Elementary Search help defines the flow of a standard input help. It is composed

of a selection method that defines where to get the data that will make up the hit list,

An interface consisting of search help parameters that define the exchange of data

between the screen and the selection method and a dialog type that controls how the

hit list will be displayed.

A Collective Search help is a combination of several elementary search helps givingthe user a different search paths. The interface parameters of the elementary search

help are assigned to the parameters of the collective search.

38. What is the difference between Clustered Tables and Pooled Tables?

A pooled table is used to combine several logical tables in the ABAP/4 dictionary.

Pooled tables are logical tables that must be assigned to a table pool when they are

defined.

Cluster table are logical tables that must be assigned to a table cluster when they are

defined.

Cluster table can be used to store control data they can also used to store temporarydata or text such as documentation.

39. user exits and customer exit.

User exit is sap defined includes so to modify it we need key from SAP.whilecustomer exit like function exit , screen exit we don’t need any key.

40. sapscript smart forms and adobe forms

Sapscript is client dependent whereas smartform is client independent.

Main window is compulsory in scripts whereas main window not compulsory in form.

Smartform output can be seen in web while in scripts it is not possible.

smartform generates function module while scripts dont generate function module.

41. screen and subscreens in module pool.

Screen has it’s own gui status while subscreen does not have any gui

status.Subscreens are part of main screen.

42. standard table and hashed tables.

Standard table can be accessed by key as well as index while You can only access

hashed tables by specifying the key. The system has its own hash algorithm for

managing the table.

diffr abap.docx

Documents

Transcript of diffr abap.docx