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What is data cleaning? How can we do that? |
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Explain in brief about critical column. |
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What are cubes? |
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What are aggregations? |
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What are measures? |
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What are fact tables? |
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What are dimensions? |
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What is OLTP? |
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What are the benefits of data warehousing? |
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What is a data mart? |
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What is the approximate size of a data warehouse? |
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How many ways U can update a relational source definition and what r they? |
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What are the types of External Loader available with Informatica? |
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Which is better among connected lookup and unconnected lookup transformations in informatica or any other ETL tool? |
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Explain about Recovering sessions? |
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What is a time dimension? give an example. |
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Can u copy the session to a different folder or repository? |
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What is difference between stored procedure transformation and external procedure transformation? |
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How to use mapping parameters and what is their use |
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In Dimensional modeling fact table is normalized or denormalized?in case of star schema and incase of snow flake schema? |
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