Informatica Interview Question and Answers

21. What are various types of Aggregation?
 
    Various types of aggregation are
  • SUM
  • AVG
  • vCOUNT
  • MAX
  • MIN
  • FIRST
  • LAST
  • MEDIAN
  • PERCENTILE
  • STDDEV
  • VARIANCE
 
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22. What are Aggregator Transformation?
  Aggregator transformation is an Active and Connected transformation. This transformation is useful to perform calculations such as averages and sums (mainly to perform calculations on multiple rows or groups).
 
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23. What are Expression transformation?
  Expression transformation is a Passive and Connected transformation. This can be used to calculate values in a single row before writing to the target.
 
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24. What are Filter transformation?
  Filter transformation is an Active and Connected transformation. This can be used to filter rows in a mapping that do not meet the condition.
 
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25. What are Joiner transformation?
  Joiner Transformation is an Active and Connected transformation. This can be used to join two sources coming from two different locations or from same location.
 
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