What are the advantages of raid 1, 1/0, and
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Explain what are the different methods of loading dimension tables?
What is data analytics in simple terms?
What is the difference between agglomerative and divisive hierarchical clustering?
Tell me one example for multi valued dimension or bridge table?
2 Answers Accenture, CMC, IBM, Logica CMG, TCS,
Explain what are non-additive facts?
What are Non-additive facts?
what are different types of partitioning in oracle ?
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,
Explain meta data?
what is parallel query?
What are the different types of scd's used in data warehousing?
What are Data Marts?
Teradata 
