What the difference is between a database, a data warehouse and a data mart?
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How union transformation is active ?
how can we convert a column into row in informatica? Eg: INPUT- a x Output Like: a b c b y x y z c z
Can we create a Integration service without a Repository service and vice versa?
How do you join more than 3 flat files in informatica?
what are 3 tech challenges/ common issues you face?
Session Recovery. 1000 rows in the source of which 500 passed through and then I killed the session. Can you perform a recovery and how
expain about the tune parameters?
In What Situations we can use MappingParameters ,Mapping Variables AND Session Parameters in REAL TIME.
what are types of dimentions?
what is incremantal aggregation?
we have to use order by,where,having we to implement sql query
How can you display only hidden files in UNIX
Teradata 
