Explain why dimenstion tables are denormalized in nature?
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What is the difference between filter and lookup transformation?
Explain the importance of data warehouse?
what is indexing ? what are different types of indexes supported by oracle ?
What is a Data Cube?
Explain a relation schema and a relation?
4.Explain Snowflkeschema ?
6 Answers EDS, HCL, IBM, iFlex, TCS,
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?
What is data analysis? Where it will be used?
What are diagrams?
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How can you clear the cache?
Explain the different types of data warehousing?
When should you use a STAR and when a SNOW-FLAKE schema?