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ETL Interview Questions & Answers

Below we have listed all the ETL Interview Questions and answers. Feel free to comment on any ETL Interview Questions or answer by the comment feature available on the page.

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ETL Interview Questions & Answers

ETL is important, as it is the way data actually gets loaded into the warehouse.ETL can also be used for the integration with legacy systems. Usually ETL implementations store an audit trail on positive and negative process runs.

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How can we use mapping variables in Informatica? Where do we use them?
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What is the difference between Power Center & Power Mart?
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Is there any way to read the MS Excel Data's directly into Informatica?Like IS there any Possibilities to take excel file as target?
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Can Informatica load heterogeneous targets from heterogeneous sources?
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Can we override a native sql query within Informatica? Where do we do it? How do we do it?
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What are the different versions of Informatica?
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Can we lookup a table from source qualifier transformation. ie. unconnected lookup
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What is ODS (operation data source)
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What is Full load & Incremental or Refresh load?
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How do we call shell scripts from informatica?
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Can we use procedural logic inside Infromatica? If yes how , if now how can we use external procedural logic in informatica?
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I'am new to SAS, can anybody explain the process of extracting data from source systems,storing in ODS and how data modelling is done.
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What are active transformation / Passive transformations?
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What are the various methods of getting incremental records or delta records from the source systems?
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What is partitioning? What are the types of partitioning?
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What are the various test procedures used to check whether the data is loaded in the backend, performance of the mapping, and quality of the data loaded in INFORMATICA.
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Techniques of Error Handling - Ignore , Rejecting bad records to a flat file , loading the records and reviewing them (default values)
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What is ETL?
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What is Full load & Incremental or Refresh load?
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What are parameter files ? Where do we use them?
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