BDC Questions

7/26/2019 BDC Questions

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1

What should be the approach for writing a BDC program?

Ans.: 1. Analysis the Data. 2. Generate SAP structure. 3. Develop transfer

program 4. Create seuential file. !. Create "atch input program. #. Process"atch input $ata

2 What is the alternative to batch input session?

Ans. : Call transaction % call $ialog

What are the steps in a BDC session ?

&he first step in a 'DC session is to i$entify the screens of the transaction that the

program (ill process. )e*t step is to (rite a program to "uil$ the 'DC ta"le that

(ill "e use$ to su"mit the $ata to SAP. &he final step is to su"mit the 'DC ta"le to

the system in the "atch mo$e or as a single transaction "y the CA++&,A)SAC&-) comman$.

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

Ans.: Sessions cannot "e run in parallel an$ not fast.

4 What do ou do when the sstem crashes in the middle of a BDC batch

session?

/Chec0 no. of recor$s alrea$y up$ate$ an$ $elete them from input file an$ run 'DCagain.

! What do ou do with errors in BDC batch session?

/Analysis an$ correct input file format an$ entries in internal ta"le 'DCDA&A.

" WH#$ are the commands that allow ou to process se%uential file? #nd what

is their snta&?

Ans :/

,AD DA&AS& rea$ing an$ &,A)S5, (riting

P) D&AS& 6$ataset name7 for 6input output appen$ing7 in

6"inary te*t 7 mo$e at PS-&-) 6position7 8SSAG 6fiel$7

,AD DA&AS& 6$ataset name 7 -)& 6fiel$7

C+S DA&AS& 6$ataset name7

D+& DA&AS& 6$ataset name7

&,A)S5, 6fiel$7 to 6$ataset name7

' What is the process for transferring data from legac sstem to (#)?Ans :/ 5&P file transfer9 8anufacturer specific fiel$ transfer )5Snet(or0 file

system;'DC.

* +&plain the process to transfer a record to a dataset?

Ans :/ &,A)S5, 6fiel$7 to 6$ataset name7.

, Wh batch input?


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Ans :/ &o input a large amount of information at off pea0 times.

1- Can data be put directl into the database?

Ans :/ )o9 only after the $ata has "een entere$ via transaction.

11 +&plain at high level. the batch input process?

Ans :/ 'atch $ata is place$ into ueues calle$ "atch input sessions 9 then place$ into

the application programs for maintenance into the $ata"ase.

12 What are the function modules associated with batch input?

Ans :/ 'DC


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APP)D 6"$c ta"le7

1! How do ou find the transaction number. program number and field names?

Ans :/

&ransaction no.9program no. System /7 status

5iel$ names / 519 &echnical help1" What are the processing modes for Batch 0nput?

Ans :/ Process on screenforegroun$ 9 Display errors only an$ process in the

"ac0groun$

1' What are the available Codes that can be utilied during batch input

processing?

Ans :/

;n terminates current "atch input transaction an$ mar0s as incorrect.

;"$el $elete current "atch input transaction from session.

;"en$ terminate "atch input processing an$ mar0 session asincorrect.

;"$a change $isplay mo$e to process the session on screen instea$ of

$isplaying only errors.

;"$e change $isplay mo$e to $isplay only errors instea$ of processing the session

on the screen.

1* What is the effect of the BDCC56(6 field name in the BDC table?

Ans :/ @ou can set the cursor an$ enter as a correspon$ing fiel$ value the name of

the fiel$ on (hich the cursor is to "e positione$ .

1, How man tpes of BDCs ou have done?

21 Wh ou choose Call transaction and7or session method?

Call transaction is mainly use$ (hen you (ant to up$ate the $ata"ase using a singletransaction 9 you can also up$ate the $ata"ase in asynchronous mo$e9 (here as

session is use$ to perform huge $ata"ase up$ations using more than one transaction

an$ (hich (ill last for a long time.

22 How you trap errors in call Transactionrrors (hile up$ating the $ata"ase using call transaction techniue are trappe$using a structure "$cmsgcall9 (hose fiel$ msgtyp "ecome e (hen an error recor$

is encountere$. &hose recor$s are formatte$ using format


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-n 'DCs (e have t(o types of up$ation mo$es 1 Synchronous 2 Asynchronous

24 What is main difference between session method and LSMW-n the conte*t of session metho$9

the metho$ of up$ating is 'atch -nputE 9

(e reuire a program to "e co$e$9

'ut in the conte*t of +S8F metho$9

&he metho$s of up$ating

using 'atch -nput;Direction -nputE

from an -DC9

from a 'AP- structure.

)o source co$e is reuire$9 the complete operation is performe$ in 1# steps

seuence

2! What is main difference between CATT and LSMW=sing +S8F you can up$ate any 0in$ of $ata "ut no changes to $ata"ase areallo(e$9 (here as CA&& tool can up$ate only master $ata9 (hich also allo(schanges to the master $ata an$ also a significant testing of $ata is possi"le

2" What is BDC and How ou use it?

'C 'asis Components//A'AP (or0"ench//'C 'asis Programming

interfaces//Data transfer

During $ata transfer9 $ata is transferre$ from an e*ternal system into the

SAP ,;3 System. &ransfer $ata from an e*ternal system into an ,;3 System as it is

installe$. &ransfer $ata regularly from an e*ternal system into an ,;3 System.


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*ample: -f $ata for some $epartments in your company is input using a system

other than the ,;3 System9 you can still integrate this $ata in the ,;3 System. &o $o

this9 you e*port the $ata from the e*ternal system an$ use a $ata transfer metho$ toimport it into the ,;3 System.

'atch input (ith "atch input sessions : Data consistency chec0 (ith the help ofscreen logic.

Fith the "atch input metho$9 an A'AP program rea$s the e*ternal $ata that is to "e

entere$ in the ,;3 System an$ stores the $ata in a H"atch input sessionH. &he sessionrecor$s the actions that are reuire$ to transfer $ata into the system using normal

SAP transactions.

Fhen the program has generate$ the session9 you can run the session to e*ecute the

SAP transactions in it. @ou can e*plicitly start an$ monitor a session (ith the "atchinput management function "y choosing System I Services I 'atch input9 or

have the session run in the "ac0groun$ processing system.

=se the 'DC


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3" 9ive real time wor: done b u in BDC ? $ransactions used ? parameters passed with fun

3' will as: u for screen no;s and dnpro names for BDC that u sa u have done/

! Which technical field in the "DCDATA table holds the last cursor position

41 What is true about the choose correct option7s@

Part of the SAP system

Processes hierarchical $ata files hea$er an$ position

)ee$s a source fiel$ for every target fiel$

## How do you read a L$CAL se%uential file?

4! How do you write a se%uential file?

#& How do you send the "DCDATA table in a Call Transaction statement?

4' What loop do you code for a '(AD DATAS(T statement?

!1 What are the steps in a "DC session ?&he first step in a 'DC session is to i$entify the screens of the transaction that the program (ill proce

ta"le that (ill "e use$ to su"mit the $ata to SAP. &he final step is to su"mit the 'DC ta"le to the syst


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CA++ &,A)SAC&-) comman$.

!2 How do you find the information on the current screen ?/ &he information on the current screen can "e foun$ "y System J Status comman$ from any menu

!3 How do you sa)e data in "DC tables ?/ &he $ata in 'DC ta"les is save$ "y using the fiel$ name 'DC


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!* Does the C#


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"4 How many sessions will be opened usin/ "DC0$

/ nly one session can "e create$ using the '

functon.

"! What is +"ATCH -,1UT. or +"DC. ?/ &he SAP system offers t(o primary metho

8&>D9 CA++ &,A)SAC&-) 8&>D for transferring

from other systems an$ )on/SAP systems. &hese t(o metho$s a

as 'A&C> -)P=& or 'atch Data Communication 'DC.

"" What are the ad)anta/es in "atch -nput ?

/ &he 'atch -nput ensures Data integrity.

)o manual interaction is reuire$ $uring Data transfer.

"' What is the functionality of +Classical "atch -npu-n Classical 'atch -nput an A'AP;4 program rea$s the e*ternal

entere$ in the SAP system an$ stores the $ata in a 'atch -nput sestores the actions that are reuire$ to enter your $ata using norma

"* Which 3unction Modules are used in +Classical "

/ 'DC


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*2 How do ou set up batch process?

Data analysis: AnalyQe the $ata that is to "e transferre$ to the SAP System.

RR

Generate SAP structures: Generate SAP $ata structures for incorporation into your$ata e*port program.

RR

Develop transfer program: @ou can (rite the program in A'AP;4 or as an e*ternal

program.

RR

Create seuential file: *port the $ata that is to "e transferre$9 to a seuential file.

RR

Create "atch input program: A'AP;4 "atch input program that (ill rea$ the $ata to

"e transferre$ from the seuential file.

RR

Process "atch input $ata: Process the $ata an$ a$$ it to the SAP System. @ou can$o this either "y:

"atch/input session metho$ or Call transaction metho$.

RR

Analyse results: Chec0 that all $ata has "een successfully processe$.

RR

Analyse rror session: Correct an$ re/process erroneous $ata.

*3 Where do you use "DC?

transferring $ata from another system (hen you install your SAP

System


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regularly transferring $ata that is capture$ "y a non/SAP system in

your company into the SAP System. Assume9 for e*ample9 that $ata collection in

some areas of your company is still performe$ "y a non/SAP system. @ou can still

consoli$ate all of your $ata in the SAP System "y e*porting the $ata from the other

system an$ rea$ing it into the SAP System (ith "atch input.

@ou can also use "atch input to transfer $ata "et(een t(o ,;3 Systems. >o(ever9there are more $irect metho$s for $oing this9 such as ,5C remote function calls.

*4 What has to be done to the pac4ed fields before submittin/ toa "DC session?

Declare these fiel$s in the internal ta"le as characters an$ the length of the fiel$

shoul$ "e same as the fiel$ length of the fiel$s $ata element. &his internal ta"le isuse$ to hol$ the $ata fetche$ from the seuential file using FS/uploa$ function

mo$ule

What is LSMW&he +S8F is a cross/application component CA of the SAP ,;3 System.

&he tool has interfaces (ith the Data &ransfer Center an$ (ith "atch input an$

$irect input processing as (ell as stan$ar$ interfaces 'AP- an$ -Doc in ,;3.

&he +S8F comprises the follo(ing main functions:

1. ,ea$ $ata legacy $ata in sprea$sheet ta"les an$;or seuential files.

5unctionRead datareplaces an$ enhances functions Spreadsheet

interfacean$Host interface of +S8F version 1.M. @ou can use any com"ination

out of PC an$ server files no(.

2. Convert $ata from the source into the target format.

3. -mport $ata to the $ata"ase use$ "y the ,;3 application.

TC$D( 5 LSMW

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