What is virtual Data Warehousing?
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explain the methodology of Data Warehousing?(Polaries)
Explain about etl data integration software?
how to join two tables without using joiner transformation .advantages of joiner over lookup and vice versa.
what is the advantage of persistent cache? when it should be used?
what is HISTOGRAM? how to generate statistics?
Explain what are the various etl tools in the market?
how do u implement unconn.stored proc. in a mapping?
What is abap? What are idocs?
what is Forward,Reverse and Re_engineering?
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
how do u decide whether u need to do aggregations at database level or at Informatica level?
Can u access a repository created in previous version of Informatica?
Teradata 
