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Can there be sub steps of etl steps?
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Explain the key challenges that you face while performing etl testing.
Give a way in which u can implement a real time scenario where data in a table is changing and u need to look up data from it.How will u configure the look up transform for this purpose?
what is a test load?
what is Forward,Reverse and Re_engineering?
what is pmrep command?
how do u estimate the number of partitions that a mapping really requires? Is it dependent on the machine configuration?
can Informatica be used as a cleansing tool? If yes, give examples of transformations that can implement a data cleansing routine.
In Which Transformation We Can Use Having Clause In Informatica?
Do we need an etl tool?
how do u estimate the depth of the session scheduling queue? Where do u set the number of maximum concurrent sessions that Informatica can run at a given time?
what is session partitioning?
how do u decide whether u need to do aggregations at database level or at Informatica level?
Teradata 
