Tuesday, July 23, 2013

Oracle Data Integrator Interview questions and Answers

1)how to implement the logic in procedures if the source side data deleted that will reflect the target side table
ANS)User this query on Command on target Delete from Target_table where not exists (Select 'X' From Source_table Where Source_table.ID=Target_table.ID).

2)if the src hav total 15 records with 2 records are updated and 3 records are newly inserted at the target side we have to load the newly changed and inserted records
ANS) Use IKM Incremental Update Knowledge Module for Both Insert n Update operations.

3)can we implement package in package?
ANS:) Yes we can call one package into other package.

4)how to load the data with one flat file and one rdbms table using joins?
ANS:) Drog n drop both File and table into source area and join as in Staging area.

5)in the package one interface got failed how to know which interface got failed if we no access to operator?
ANS:)Make it mail alert or check into SNP_SESS_LOg tables for session log details.

6)if the src and tgt are oracle technology tell me the process to achieve this requirement(interfaces,kms,models)
ANS) Use LKM SQL to SQL or LKM SQL to Oracle , IKM Oracle Incremental update or Control append.

7)how to implement data validations?
ANS:) Use Filters & Mapping Area AND DataQuality related to constraints use CKM Flowcontrol.

8)how to handle exceptions?
ANS) Exceptions In packages advanced tab and load plan exception tab we can handle exceptions.

9)what we specify the in xml dataserver and parameters for to connect to xml file?
ANS:) Filename with location :F and Schema :S this two parameters

10)how to implement cdc
ANS) CDC is a step by step process please refer.  http://oditraining.blogspot.in/2012/09/cdc-changed-data-capture-in-odi-step-by.html

11)how to reverse engineer views(how to load the data from views)?
ANS) In Models Goto Reverse engineering tab and select Reverse engineering object as
VIEW.



12) What is Start Schema and Snowflake Schema?
Please refer DWH Concepts. http://oditraining.blogspot.in/2012/07/data-ware-housing-concepts-with.html

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