ETL Interview Questions
Questions Answers Views Company eMail

what is the difference between OLTP database and data warehousing database?

3 5874

what is data modeling?

1898

what is the difference steps for data modeling?

2074

what are the data modeling tools you have used?(polaris)

1543

what is the difference between cardinality and Nullability?

2506

what is Forward,Reverse and Re_engineering?

1724

what is the meant by Normalization and de-normalization?

2 7702

how would u estimate the size of Aggregator transform data and index cache?

2005

how do u decide whether u need to do aggregations at database level or at Informatica level?

1 3601

how would u estimate the size of Lookup transform data and index cache?

1 3221

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?

1 3780

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?

2426

how do u really know that paging to disk is happening while u are using a lookup transform?

2041

how do u set partition points in the mapping?

Quintiles,

1794

how do u estimate the number of partitions that a mapping really requires? Is it dependent on the machine configuration?

1 2930


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Un-Answered Questions { ETL }

what are the reports created in mm and sd side using sap bw in a project? name some of them and explain the requirement?

1684


what is session partitioning?

1458


Do we need an etl tool?

553


What is etl process. How many steps etl contains explain with example?

515


What are snapshots? What are materialized views & where do we use them? What is a materialized view log?

649






Explain etl?

572


How can we use external procedural logic in informatica?

526


What is a mapping?

558


What is a staging area? What is the purpose of a staging area?

486


Explain do we need an etl tool?

523


how do u handle performance issues in Informatica . where can u monitor the performance ?

4266


how many maximum session supports to multiload in teradata ??

1692


Explain about round-robi?

621


What is etl process?

530


what is the difference steps for data modeling?

1585