What is etl tool in hadoop?
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how do u really know that paging to disk is happening while u are using a lookup transform?
Eliminating of duplicate records without using dynamic lookups
What is factless fact schema?
Give the benefits of data integration suite?
Identifying the bottlenecks in various components of Informatica and resolving them.
What is etl process?
Explain the difference between etl tool and olap tools?
Define Dynamic push down optmization?
What is full load & incremental or refresh load?
what is granularity in Data ware House?
what are the facilities provided by OLAP to analytical users?
how would u estimate the size of Aggregator transform data and index cache?
Teradata 
