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ETL Interview Questions
Questions Answers Views Company eMail

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

 3 5863

what is data modeling?

 1892

what is the difference steps for data modeling?

 2069

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

 1538

what is the difference between cardinality and Nullability?

 2504

what is Forward,Reverse and Re_engineering?

 1721

what is the meant by Normalization and de-normalization?

 2 7695

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

 2002

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

 1 3597

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

 1 3214

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 3775

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?

 2419

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

 2038

how do u set partition points in the mapping?

Quintiles,

1792

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

 1 2924

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Un-Answered Questions { ETL }

What are the various tools used in etl?

539

Suppose I am loaded with questions as I am an experienced etl coder, but not an analytical report builder. I am using analysis services to build a cube but am trying to choose the reporting architecture. Can someone please confirm whether or not reporting services (using the business intelligence report) will allow for slicing and dicing, or is it only a static report builder. Also, if I am using the cube browser in analysis services, where can I put the option of non empty so that I dont see records that are blank.?

496

1.Identify and discuss the problems which are occurred during data quality verification for the single-source and multi-source problems. 2.Testing has very important role in DWH. In ETL testing phase, how can we perform the integration testing and regression testing? 3.What are the perquisites of system testing and regression testing in ETL phase?

1839

please tell me any easy ways of testing the Data warehouse project. In my project we are not using any tools for ETL. we are writing scripts in SCRIPTELLA. And we using Pentaho tool for Reporting How can i test all these. please tell me ASAP. thanks in adavance

2021

Explain about hash partitioning?

535




explain the methodology of Data Warehousing?(Polaries)

1792

what are the facilities provided by data warehouse to analytical users?

1661

Just Completed the informatica Certification ,for Dumps please email me on infamaddy@gmail.com i will send it to you 

1342

What are dimensions?

571

What is staging area referring to?

568

what are the reporting tools and difference between them?

1583

Explain what are the various etl tools in the market?

511

what is the difference between cardinality and Nullability?

2823

what is the main role of FI on business

1620

Define Dynamic push down optmization?

1905

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