Interview Questions.

Question 1. What Is Lsmw All About?

Answer :

LSMW is a device supplied by means of SAP with the intention to add large amount of information from legacy report to R/3 machine. The Legacy System Migration Workbench (LSMW) is a tool to switch information from legacy systems (Non SAP System) into an R/3 System (SAP System).

LSMW supports a step-by using-step procedure; if one step is accomplished and stored then next step routinely follows.

Apart from creation of mission/ subproject/ object and recording, there are 14 basic steps protected in LSMW.

Through LSMW you'll create Master facts, create transactional statistics, alter current master facts and so forth. This device may be very beneficial while some mass adjustments are to be completed and no standard SAP transactions are available for that.

There are few general items available in LSMW e.G. Cloth grasp, vendor grasp, customer master, shopping information document, buy requisitions, purchase orders and so on. Using these general objects you can do mass statistics upload and mass transactions.

Apart from this LSMW presents another capability of recording the transaction after which carrying that out generally with large data. Examples are mass deletion of purchase requisitions, mass deletion of deliberate orders etc.

Question 2. State The Difference Between Lsmw And Bdc?

Answer :

LSMW is basically designed for useful consultants who do no longer do an awful lot coding however need to explore the capability while BDC is designed for a technical representative.
LSMW gives one of a kind technique for migrating information: Direct enter, BAPI, I-Doc, Batch enter recording even as BDC essentially uses recording.
LSMW mapping is performed via SAP whilst in BDC we ought to do it explicitly.
LSMW is largely for wellknown SAP utility at the same time as BDC essentially for custom designed application.
Coding can be done flexibly in BDC when as compared to LSMW.
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Question 3. When Should We Prefer Using Lsmw Over Other Legacy Data Transfer Methods?

Answer :

In case if you accept as true with the records in the flat report and recognize there isn't lots coding to be completed, then we will use LSMW. On the alternative hand if there is a lot of validations to be completed cross for BDC.
Also LSMW can be preferred for uploading Master Data statistics and trendy SAP applications. Since LSMW is a device and usually it uses standard software/gadgets, the execution might be quicker, and less effort is wanted to add grasp facts.
Question four. What Are The Advantages Of Lsmw?

Answer :

It's a code loose device (but if required coding can be accomplished) - Therefore it allows practical humans to add records from legacy to SAP device.
Since it's an uploading device supplied by SAP, it has a dependent manner of working. You will have to finish every step before beginning the subsequent step.
Since it is integrated in R/three it's far unbiased of character platform. The whole project may be downloaded and uploaded in any environment in contrast to BDC which has to be evolved in development server and then transported to Production Server.
It may be favored when there is a need to add large volume of information.
It is desired best if there is a demand for one time switch of statistics.
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Question five. What Is The Disadvantages Of Lsmw?

Answer :

LSMW is not appropriate for common information transfer as there are a number of steps which can be to be repeated each time.

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Question 6. What Are The Import Methods Available In Lsmw? State The Advantage & Disadvantage Of Each Method?

Answer :

There are 4 wellknown import methods to be had in LSMW.

IDOC's:

Advantages: Fast to load, clean processing, low programming for fashionable IDOC’s.
Disadvantages: Good understanding of IDOC processing required, time eating if adjustments should be made to a created IDOC.
BAPI’s:

Advantages: Fast to load, easy processing, logical interface for useful/end consumer primarily based on the commercial enterprise approaches worried.
Disadvantages: Not constantly whole with all input fields of a transaction.
STANDARD/DIRECT INPUT:

Advantages: Well tested approach, Fast to load, easy processing.
Disadvantages: No revel in transactions, not continually complete with all enter fields of a transaction.
BATCH INPUT:

Advantages: Easy modifiable, all fields are to be had, smooth re-processing.
Disadvantages: Comparatively sluggish, to use new screens or tabs a new recording has to be created, not without problems usable for experience transactions, dependent on consumer settings, distinction in foreground and history processing might also occur.
Question 7. What Is Data Migration & What Is The Significance Of Data Migration. State The Most Important Data Migration Tools Available In Sap?

Answer :

Data Migration stands for records transfer among  like or alike structures. During SAP R/3 implementation the records needs to be moved from legacy machine to the SAP machine. Sometimes periodic records transfer between R/three and different device (interfacing) is also required. Both of the above form a part of statistics migration.

Significance of records migration are:

Data migration comes in the end of R/3 implementation.
To begin with Data Migration first configuration ought to be completely finished
Data migration is ready 20% to forty% of the full implementation costs.
The gear for information migration are:-

BDC (Batch Data Communication)
LSMW (Legacy System Migration Workbench)
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Question eight. What Are The Main Functions Of Lsmw?

Answer :

The 3 major capabilities of the LSMW are:

Reading the legacy statistics from one or several files (e.G. Spreadsheet tables, sequential documents).
Converting information from its authentic (legacy machine) format to the target (SAP) format
Importing the facts the use of general interfaces (Batch Input, Direct Input, BAPI, IDoc) into the database of the R/3 software.
Transaction Code to begin the LSM Workbench is LSMW.

Question 9. Can Lsmw Be Used For Handling Multiple Recordings?

Answer :

Generally Multiple Recordings are achieved for transactions which has multiple get entry to sequences like VK11, TK11, and many others. Batch Input Method is able to dealing with a couple of recording and Batch Input recording is one of the import strategies available in LSMW. So yes, LSMW may be used for managing more than one recordings.

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Question 10. Can You Carry Out Validations Or Say Can You Write Your Custom Code In Lsmw?

Answer :

Yes, Validations may be finished in LSMW. Similarly custom code also can be added in LSMW. Validations may be treated in fifth step (Maintain field mapping and conversion guidelines) of LSMW.

For instance, if you are updating Vendor Master, You will want to perform a validation to check whether or not supplier is legitimate or not.

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Question 11. Can Data Be Transferred From One R/3 To Another R/three Via Lsmw?

Answer :

Yes, records can be transferred from one R/3 System to any other. Export capability must be programmed to obtain the equal.

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Question 12. Is It Possible To Assign A Transaction Code To A Lsmw Object?

Answer :

Yes, transaction codes can be comprised of SHD0 for LSMW Objects.

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Question 13. What Kind Of Data Can Be Migrated Using The Lsmw? Is It Certain That The Imported Data Will Be Consistent?

Answer :

Wide variety of Master Data (e.G. G/L debts, customer grasp, supplier master, fabric master, bills of cloth) and Transaction Data (e.G. Financial files, sales orders) can be migrated the use of LSMW.

Yes, the imported records may be steady because the data is loaded thru fashionable interfaces of the packages with a view to consist of all checks which are run for online transactions. 

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Question 14. How Many Steps Needs To Be Followed While Using Lsmw For Data Migartion. Also Mention The Steps Sequentially?

Answer :

No. Of steps varies for extraordinary import techniques. Initially there will be 20 steps however after processing step 1 it'll reduced to fourteen for session method.

Question 15. What Is The Lsm Workbench?

Answer :

The LSM Workbench is an R/3-primarily based tool that helps unmarried or periodic records transfer from your non-SAP system to R/3.

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Question 16. What Are The Core Functions Of The Lsm Workbench?

Answer :

Importing legacy statistics from PC spreadsheet tables or sequential documents

Converting facts from its unique (legacy machine) format to the goal (R/three) format

Importing the facts using the same old interfaces of R/three (IDoc inbound processing, batch input, direct enter)

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Question 17. Which Data Can Be Migrated Using The Lsm Workbench?

Answer :

By method of wellknown switch packages: a huge variety of grasp data (e.G. G/L accounts, patron grasp, supplier grasp, cloth grasp, bills of fabric) and transaction statistics (e.G. Economic files, income orders)

By way of recording of transactions: in addition data gadgets (if the transaction may be run in batch enter mode)

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Question 18. Can I Be Certain That The Imported Data Is Consistent?

Answer :

Yes. The facts is loaded thru the same old interfaces of the programs. This will consist of all exams which might be run for on line transactions. Invalid facts can be rejected.

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Question 19. Can I Be Certain That Conversions Are Carried Out Identically Across The Applications?

Answer :

Yes. The LSM Workbench works on the precept of critical (reusable) guidelines. This approach guarantees that, as an example, the fabric variety is converted within the equal manner wherever the reusable rule is used for conversion.

Question 20. Do I Need An Extensive Knowledge Of Abap To Use The Lsm Workbench?

Answer :

No. The LSM workbench offers the primary conversion strategies at the rush of a button. For complex conversions, character ABAP coding may be brought.

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Question 21. Do I Have To Migrate Table By Table?

Answer :

No. Business items which include cloth grasp, customer grasp or FI record are migrated

Question 22. Can I Transfer Data That Is On My Pc?

Answer :

Yes. The LSM workbench can read the information without delay out of your PC. Only when using the periodic interface, the information has to be on a server available through R/three

Question 23. Is The Lsm Workbench Part Of The Standard R/3 System?

Answer :

No. The LSM Workbench can be downloaded without spending a dime from SAPNET: http://provider.Sap.Com/LSMW

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Question 24. Is There An Extra Charge For The Lsm Workbench?

Answer :

No. The LSM Workbench is available freed from rate to SAP’s customers and companions

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Question 25. Is There An Lsm Training Course?

Answer :

There is no particular training route for LSMW LSMW is a part of the 5-day popular education BC420 Workshops at consumer website online are done at customers charge Examples in the media center may be used for self-examine

Question 26. Can I Migrate From R/three To R/three Via Lsmw?

Answer :

Yes, however:

Export needs to be programmed

Source systems have to be defined

Fields of the source systems may be loaded from the dictionary

Mapping has to be accomplished manually è a lot of fields!! Automatic fieldmapping might be used Import of large data quantities can take a number of time (maximum of the time information amount is better than for Migration from legacy systems) History data can't be building up most of the time

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Question 27. Can I Build Periodic Interfaces Using Lsmw?

Answer :

Yes. It is possible to build periodic interfaces the use of the body application /SAPDMC/SAP_LSMW_INTERFACE

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