What is data warehosuing hierarchy?

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Explain piconet?

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Explain what is partitioning? What are the types of partitioning?

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Explain clustering algorithm?

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Hi Guys, I have been to L& T last week ..Please find the questions mentioned below 1)Slowly changing dimension types 2)DML statement 3)DDL statement 4)write a syntax to create database 5) differences between count(*) and count(column) 6) differences between union and union all 7) what is decode 8) what is NVL 9) Arrange the values in ascending order 10,5,20,15,null 10)Primary and surrogate key 11)what is group by clause does? 12)what is difference between truncate and delete 13)what is difference between OLAP and OLTP ? 14)Architecture of Datawarehouse 15)how do you test the data validation from source as (flat file and xml) to staging tables. 16)what is shedule and time bound the mentioned above question asked in two rounds.all the best

2 Answers   L&T,

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Explain the main difference between inmon and kimball philosophies of data warehousing?

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What is a Decision Tree Algorithm?

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What is difference between a connected look up and unconnected look up?

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Is there any difference in testing database and data ware housing?

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What is a general purpose scheduling tool?

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How to join 3 database like flat file, oracle, db2 in informatrica?

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Explain what type of indexing mechanism do we need to use for a typical datawarehouse?

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