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What is the difference between olap and oltp?
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Explain piconet?
Explain what are the different types of join operations?
Explain the advantages of raid 1, 1/0, and 5. What type of raid setup would you put your tx logs.
What are the key columns in Fact and dimension tables?
What is many-to-many dimensional model in datawarehousing ?
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Explain what are the basic needs to join two sources in a source qualifier?
Explain difference between snow flake and star schema. What are situations where snow flake schema is better than star schema to use and when the opposite is true?
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6 Answers Accenture, IBM, TCS,
What is ?Data Warehousing??
How to handle time period attribute for time dependent data?? a.)add time period as a part of pk b.)add time period simply and make it nullablec.)add time period simply and make it not null.
what are confirmed dimension? We alwys give date as a conformed dimension but if it has different format for different contries say YYMMDD for italy and MM-DD-YYYY for france.Then are they not confirmed.
4 Answers IBM, MAHINDRA, Tech Mahindra,
Teradata 
