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Data Warehousing Interview Questions & Answers

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

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Data Warehousing Interview Questions & Answers

Data warehousing is the process of constructing and using a data warehouse. A data warehouse is constructed by integrating data from multiple heterogeneous sources that support analytical reporting, structured and/or ad hoc queries, and decision making. A data warehouse is a subject-oriented, integrated, time-variant and non-volatile collection of data in support of management's decision making process. Subject-Oriented: A data warehouse can be used to analyze a particular subject area.

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What are the major differences between Informatica 7.1,8.1,8.5 and 8.6?
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What is active data warehousing?
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What is hybrid slowly changing dimension?
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What is degenerate dimension table?
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What is a level of Granularity of a fact table?
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Data Warehousing - Introduction
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Why is SAS so popular?
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What is a Star Schema?
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Which is the optimized method of extracting the data?
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What are aggregations?
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What is data cleaning? How can we do that?
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What is ODS?
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Can u copy the session to a different folder or repository?
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What are the types of External Loader available with Informatica?
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What is difference between stored procedure transformation and external procedure transformation?
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How to use mapping parameters and what is their use
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What is Data Mart?
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What is the difference between OLAP and data warehouse?

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What are the different interconnected layers of a dataware house?
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What is active data warehousing?
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