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Define data warehouse?
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Why should we use data ware housing and how can you extract data for analysis with example?
What is Star Schema?
Hierarchy of DWH?
2 Answers Accenture, EDS, IBM, iFlex, TCS,
How many clustered indexes can you create for a table in dwh? In case of truncate and delete command what happens to table, which has unique id 347 what is hybrid slowly changing dimension?
what is parallel query?
Explain how to export mappings to the production environment?
what are different types of partitioning in oracle ?
What is data merging, data cleansing and sampling?
What is latest version of power center / power mart?
What is an IDQ file? What is the purpose of the IDQ file and what kindof information does it usualy hold? Can it be imported by informatica?
Explain hybrid slowly changing dimension?
Explain what is cost benefit analysis (cba)?
Teradata 
