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Do we need an ETL tool? When do we go for the tools in the market?
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What is full load & incremental or refresh load?
Explain the difference between etl tool and olap tools?
How etl testing is different from database testing?
what happens if the info.server doesn't find the session parameter in the parameter file?
list the transformation used for the following:Heterogeneous sources,Homogeneous sources,Find the 5 highest paid employees with in a dept,create a summery table,generate surrogate keys
what is Forward,Reverse and Re_engineering?
Define Dynamic push down optmization?
what is data modeling?
what is dynamic insert?
how do u estimate the number of partitions that a mapping really requires? Is it dependent on the machine configuration?
hoe to access second value in mapping parameter if it is having more than one value ?????????????
where is the cache (lookup, index) created and how can you see it.
Teradata 
