Comparisons

Question 1: What is the difference between User Exit and Function Exit?

User Exit	Customer Exit
User exit is implemented in the form of a Subroutine i.e. PERFORM xxx. Example: INCLUDE MVF5AFZZ à PERFORM userexit_save_document_prepare.	A customer exit can be implemented as: Function exit Screen Exit Menu Exit Field Exit Example: CALL Customer function ‘xxx’ INCLUDE xxx. You modify this include.
In case of a PERFORM, you have access to almost all the data. So you have better control, but more risk of making the system unstable.	You have access only to the importing, exporting, changing and tables parameter of the Function Module. So you have limited access to data.
User exit is considered a modification and not an enhancement.	A customer exit is considered an enhancement.
You need Access Key for User Exit.	You do not need access key.
Changes are lost in case of an upgrade.	Changes are upgrade compatible.
User exit is the earliest form of change option offered by SAP.	Customer exits came later and they overcome the shortcomings of User Exit.
No such thing is required here.	To activate a function exit, you need to create a project in SMOD and activate the project.

   What is the difference between RFC and BAPI? 

BAPI	RFC
Just as Google offers Image/Chart/Map APIs OR Facebook offers APIs for Comment/Like, SAP offers APIs in the form of BAPIs. BAPI is a library of function modules released by SAP to the public so that they can interface with SAP.	RFC is nothing but a remote enabled function module. So if there is a Function Module in SAP system 1 on server X , it can be called from a SAP system 2 residing on server Y.
There is a Business Object Associated with a BAPI. So a BAPI has an Interface, Key Field, Attributes, Methods, and Events.	No Business Object is associated with a RFC.
Outside world (JAVA, VB, .Net or any Non SAP system) can connect to SAP using a BAPI.	Non–SAP world cannot connect to SAP using RFC.
Error or Success messages are returned in a RETURN table.	RFC does not have a return table.

Question 3:What is the difference between SAPSCRIPT and SMARTFORM? 

SAPSCRIPT	SMARTFORM
SAPSCRIPT is client dependent.	SMARTFORM is client independent.
SAPSCRIPT does not generate any Function module.	SMARTFORM generates a Function Module when activated.
Main Window is must.	You can create a SMARTFORM without a Main Window.
SAPSCRIPT can be converted to SMARTFORMS. Use Program SF_MIGRATE.	SMARTFORMS cannot be converted to SCRIPT.
Only one Page format is possible	Multiple page formats are possible.
Such thing is not possible in SCRIPT.	You can create multiple copies of a SMARTFORM using the Copies Window.
PROTECT … ENDPROTECT command is used for Page protection.	The Protect Checkbox can be ticked for Page Protection.

Question 4:What is the difference between Call Transaction Method and the Session method ?

Session Method	Call Transaction
Session method id generally used when the data volume is huge.	Call transaction method is when the data volume is   low
Session method is slow as compared to Call transaction.	Call Transaction method is relatively faster than Session method.
SAP Database is updated when you process the sessions. You need to process the sessions separately via SM35.	SAP Database is updated during the execution of the batch input program.
Errors are automatically handled during the processing of the batch input session.	Errors should be handled in the batch input program.

Question 5: What is the difference between BDC and BAPI?

BAPI	BDC
BAPI is faster than BDC.	BDC is relatively slower than BAPI.
BAPI directly updates database.	BDC goes through all the screens as a normal user would do and hence it is slower.
No such processing options are available in BAPI.	Background and Foreground processing options are available for BDC.
BAPI would generally used for small data uploads.	BDCs would be preferred for large volumes of data upload since background processing option is available.
For processing errors, the Return Parameters for BAPI should be used.This parameter returns exception messages or success messages to the calling program.	Errors can be processed in SM35 for session method and in the batch input program for Call Transaction method.

Question 6: What is the difference between macro and subroutine?

Macro	Subroutine
Macro can be called only in the program it is defined.	Subroutine can be called from other programs also.
Macro can have maximum 9 parameters.	Can have any number of parameters.
Macro can be called only after its definition.	This is not true for Subroutine.
A macro is defined inside: DEFINE … …. END-OF-DEFINITION.	Subroutine is defined inside: FORM ….. ….. ENDFORM.
Macro is used when same thing is to be done in a program a number of times.	Subroutine is used for modularization.

Question 7: What is the difference between SAP memory and ABAP memory?

SAP Memory	ABAP Memory
When you are using the SET/GET Parameter ID command, you are using the SAP Memory.	When you are using the EXPORT IMPORT Statements, you are using the ABAP Memory.
SAP Memory is User Specific. What does this mean?àThe data stored in SAP memory can be accesses via any session from a terminal.	ABAP Memory is User and Transaction Specific.What does this mean?à The data stored in ABAP memory can be accessed only in one session. If you are creating another session, you cannot use ABAP memory.

Question 8:

Function Module	BAPI
Might Be Remote Enabled or May not be Remote Enabled	BAPI are RFC enabled function modules
RFC are direct system call	in BAPI there is no direct system call
Function modules are modularization elements in the ABAP programming language	BAPIs are defined in the BOR as methods of SAP business object types that carry out specific business functions
In web developments, RFC can be compared to HTTP	In web developments, BAPIs are CGI applications

 

Question: 9

Check table	Value table
data can be maintained at client level	This is maintained at Domain Level
contents of the check will be used as an input help(F4 Help) for a particular field	contents of Value Table are never used in Input Help
For example you go to Domain   SHKZG – Debit/credit indicator.  Here only allowed values are H or S. Whenever you use this Domain, the system will forces you to enter only these values.	Whenever an employee Transacts we need to check whether that employee exists, so we can refer to the employee master table.

 

Question: 10

Tables	Structure
Tables are SAP Tables which stores data in its fields	Structure is temporary tables which doesn’t store data in it but use it for calculation purpose during the transactions.
has an underlying database	no underlying database
Permanent Storage of data	Temporary Storage of data
Table can have primary key	structure does not have
Table can have the technical attribute	structure dose not have

 

Tables	Info types
Not a Time Constraint	Time Constraint
Doses not Create automatically	Creating info types automatically creates tables/Structure
Used in every Modules	Used in HR Modules

 

Select single	select upto one row
The Usage Of Buffer
will search for all the satisfied data and bring all that data into Buffer and later it will give to that data to the program	will end the search after getting the 1st satisfied record and gives that record to the program
Takes More Time	Takes less Time

 

clear	refresh
This Statement will clear the Internal Table Header content This Statement will clear the Internal Table Header content	Refresh will deletes the Internal Table content but still memory is not freed

 

Type	Like
you assign data type directly to the data object while declaring	You assign the data type of another object to the declaring data object. The data type is referenced indirectly
Type is a keyword used to refer to a data type	Like is a keyword used to copy the existing properties of already existing data object
type refers the existing data type	Like refers the existing data object.

 

Transparent	pooled
Transparent tables in the dictionary has a one-to-one relation with the table in database	Pooled tables in the dictionary has a many-to-one relation with the table in database
Its structure corresponds to single database field	Corresponds to many
Table in the database has the same name as in the dictionary	Table in the database has the different name as in the dictionary
Transparent table holds application data	Pooled table are stored in table pool at the database level

 

CI	Append
we can include “include structure” anywhere in the table	append structure must be appended only at the end of the table
include structure can be used more than one time in a table	append structure must be used only once in a table
include structure can be nested to a depth of 9 structure	we can’t nest append structure
It is enhanced by customer	Not necessary to be that way

 

Template	Table
Have the fixed length once you define any template with size of any number of rows columns then you get the template for that many numbers of rows and columns but if you have more than define number records you can’t see the other records. Template is Static.	Dynamic it grows dynamically as your number of records grow

 

Dynamic Actions	User Exit
1.Here only initialization of an info type 2. Less time consuming to write. 3.Table T588Z	1. Along with initialization of an info type, depending upon other info type validation also can be done like in can be done. IT 16 the contract end date cannot be entered more than 6 months. 2. Require programming approach so more 3. PBAS0001

 

Remote enable FM	BAPI
You create business objects and those are then registered in your BOR (Business Object Repository) which can be accessed outside the SAP system by using some other applications (Non-SAP) such as VB or JAVA. In this case u only specify the business object and its method from external system in BAPI there is no direct system call.	RFC are direct system call.

 

Domain	Data Element
Specifies the technical attributes of a data element – its data type, length, possible values, and appearance on the screen. Each data element has an underlying domain. A single domain can be the basis for several data elements. Domains are objects in the ABAP Dictionary	Describes the business function of a table field. Its technical attributes are based on a domain, and its business function is described by its field labels and documentation.

 

Float	Packed Number
It cannot be declared in Parameters	It can be declared in Parameters

 

Primary Key	Unique Key
It can accepts 0 value and cannot be NULL.	It can be NULL

 

HRP1000	HRP1001
Determines the existence of an organizational object.	Defines the Relationships between different objects
we create different objects like Org. Unit, Job, Position etc	we create the relationship between the above created objects like “Position belongs to Org. Unit”, etc.

 

Customizing request	workbench request
Involve changes recorded to client-specific Customizing objects	Involve changes to cross-client Customizing and Repository Objects. The objects are independent of the client
These client specific requests are used for copying and transporting changed system settings from client-specific tables.	The requests are used for transferring and transporting changed Repository objects and changed system settings from cross-client tables.

 

SE01	se09	SE10
Correction & Transport Organizer – More of generic organizer.	Workbench Organizer – a part of SE01	Customising Organizer – also a part SE01 (Transport Organizer)
	Workbench organiser is the set of utilities for development change management.All Development changes are tracked via Workbench organiser.	Customising organiser is the set of tools for customising change management.All customizing changes are tracked via customising organiser.

 

ALV LIST	ALV GRID
alv list is done with Function modules	alv grid can also be done with FM, but can also be done using OO concepts
we cannot show more than one alv list on one screen	Alv grid (using oo concept) requires designing the screen layout . Hence, in one screen, we can show more then one alv grid
Less Memory as compared	ALV grid uses ActiveX controls present on the Presentation Server. Hence, it consumes More Memory on the presentation server
ALV LIST is Display Only	ALV Grid Can Be made EDITABLE for entry purpose.
Not possible	Possible without horizontal lines without vertical lines without cell merging during sorts display total lines above the entries
ALV LIST Can be displayed hieraicharlly	ALV GRID cannot be displayed hierarichally

 

macro	subrouine
Macros can only be used in the program the are defined in and only after the definition.	Subroutines (FORM) can be called from both the program the are defined in and other programs (‘perform ‘ of ‘perform in program ‘).
Macros can take max 9 parameters.	Subroutines can take any amount of parameters.
Macros are expanded at compilation / generation.	Subroutines are ‘expanded’ at runtime.
ALV LIST is Display Only	ALV Grid Can Be made EDITABLE for entry purpose.
Not possible	Possible without horizontal lines without vertical lines without cell merging during sorts display total lines above the entries
ALV LIST Can be displayed hieraicharlly	ALV GRID cannot be displayed hierarichally

 

sy-tabix	sy-index
NO of record in the internal table	used for loop counter
This can be used with Loop—EndLoop or with Describe table .	It acts like Loop Iteration Cunter.

 

check table	searchhelp
Check table is a master table.   Like T000 for client, t001w for company codes, tcurc for currency.  When we write code like ‘PARAMETER V_WERKS LIKE MARC-WERKS OBLIGATORY VALUE CHECK’ the value we entered will be cross checked with the table T001W for existence	Search help is some thing which pops-up when we press F4.  It shows a list of values of available for that field from a particular table. There is no checking scenario in search help.

 

sy-ucomm	okcode
It contains the latest user action triggered	generally a variable that we declare as a type of sy-ucomm

 

skip	reserve
It is for leave the blank line between two lines. We may use this statement while preparing the selection screen.	Reserve is used to prevent page break between the the set of lines