Technical Interview Questions

How to debugg a script?

Ans      Go to SE71, give layout set name, go to utilities select debugger mode on.

 

How many maximum sessions can be open in SAPgui?

Ans      There are maximum 6 sessions open in SAPgui.

 

SAP Scripts and ABAP programs are client dependent or not? Why?

Ans

 

What are System Variable?

Ans      System variables have been predefined by SAP. We can use these variables in formulas or, for example, to pass on certain pieces of information to a function module. How the function called by the function module behaves depends on the type of information passed on.

At present, we can use the following system variables:

System Variable	Use	Meaning
SY_MODE	In function modules	Current mode of the PI sheet
SY_TEST	In function modules	Status of the PI sheet (test or active)
SY_ROW	In function modules	Current table line
SY_VALUE or X	Generally	Refers to the immediately preceding input value

 

Is it compulsory to use all the events in Reports?

Ans     

 

 

 

 

What is the difference between sum and collect?           

Ans      Sum: You can only use this statement within a LOOP. If you use SUM in an AT - ENDAT block, the system calculates totals for the numeric fields of all lines in the current line group and writes them to the corresponding fields in the work area. If you use the SUM statement outside an AT - ENDAT block (single entry processing), the system calculates totals for the numeric fields of all lines of the internal table in each loop pass and writes them to the corresponding fields of the work area. It therefore only makes sense to use the SUM statement in AT…ENDAT blocks.

If the table contains a nested table, you cannot use the SUM statement. Neither can you use it if you are using a field symbol instead of a work area in the LOOP statement.

            Collect:

 

What are session method and call transaction method and explain about them?

Ans      Session method – Use the BDC_OPEN_GROUP to create a session. Once we have created a session, then we can insert the batch input data into it with BDC_INSERT. Use the BDC_INSERT to add a transaction to a batch input session. We specify the transaction that is to be started in the call to BDC_INSERT. We must provide a BDCDATA structure that contains all the data required to process the transaction completely. Use the BDC_CLOSE_GROUP to close a session after we have inserted all of our batch input data into it. Once a session is closed, it can be processed.

 

Call Transaction -

In this method, we use CALL TRANSACTION USING to run an SAP transaction. External data does not have to be deposited in a session for later processing. Instead, the entire batch input process takes place inline in our program.

 

If you have 10000 records in your file, which method you use in BDC?

Ans      Call transaction is faster then session method. But usually we use session method in real time…because we can transfer large amount of data from internal table to database and if any errors in a session, then process will not complete until session get correct.

 

What are different modes of Call Transaction method and explain them?

Ans      There are three modes of Call Transaction method:

 

1)      A – Display All Screens                                                                                    

2)      E – Display Errors

3)      N – Background Processing

 

What is the typical structure of an ABAP program?

Ans      HEADER, BODY, FOOTER.

 

What are field symbols and field groups? Have you used “component idx of structure” clause with field groups?

Ans      Field Symbols – They are placeholder or symbolic names for the other fields. They do not physically reserve space for a field, but point to its contents. It can point to any data objects.

 

            Field-symbols <fs>      

 

Field Groups – Field groups does not reserve storage space but contains pointers to existing fields.

 

An extract dataset consists of a sequence of records. These records may have different structures. All records with the same structure form a record type. You must define each record type of an extract dataset as a field group, using the FIELD-GROUPS statement.

 

            Field-groups <fg>

 

What should be the approach for writing a BDC program?

Ans      STEP 1: CONVERTING THE LEGACY SYSTEM DATA TO A FLAT FILE

   to internal table CALLED “CONVERSION”.

 

STEP 2: TRANSFERING THE FLAT FILE INTO SAP SYSTEM CALLED

  “SAP DATA TRANSFER”.

 

STEP 3: DEPENDING UPON THE BDC TYPE

 

i) Call transaction (Write the program explicitly)

ii) Create sessions (sessions are created and processed. If success, data will transfer).

 

What is a batch input session?

Ans      BATCH INPUT SESSION is an intermediate step between internal table and database table. Data along with the action is stored in session i.e. data for screen fields, to which screen it is passed, program name behind it, and how next screen is processed.

 

            Create session – BDC_OPEN_GROUP

            Insert batch input – BDC_INSERT

            Close session – BDC_CLOSE_GROUP

 

What is the alternative to batch input session?

Ans      Call Transaction Method & Call Dialog

 

A situation: An ABAP program creates a batch input session. We need to submit the

program and the batch session in background. How to do it?

Ans      Go to SM36 and create background job by giving job name, job class and job steps

(JOB SCHEDULING)

 

 

 

What is the difference between a pool table and a transparent table and how they are stored at the database level?

Ans      Pool Table -

 

1)      Many to One Relationship.

2)      Table in the Dictionary has the different name, different number of fields, and the fields have the different name as in the R3 Table definition.

3)      It can hold only pooled tables.

 

Transparent Table –

1)      One to One relationship.

2)      Table in the Dictionary has the same name, same number of fields, and the fields have the same name as in the R3 Table definition.

3)      It can hold Application data.

 

What are the problems in processing batch input sessions? How is batch input process different from processing on line?

Ans      Two Problems: -

 

1) If the user forgets to opt for keep session then the session will be automatically removed from the session queue (log remains).  However, if session is processed we may delete it manually.

2) If session processing fails, data will not be transferred to SAP database table.