1. Informatica Interview Question Answers
Collection
 Informatica FAQS Technical Interview Questions
 Informatica Job Interview Questions Answers
 Informatica ETL Interview Questions
 Informatica Interview FAQs And Answers
 Informatica Interview Questions Collection
When to use Abort, Decode functions?
Ans: Abort can be used to Abort / stop the session on an error condition. If the primary
key column contains NULL, and you need to stop the session from continuing then you
may use ABORT function in the default value for the port. It can be used with IIF and
DECODE function to Abort the session.
What is constraint based loading ?
Ans: Constraint based loading. the data was loaded into the target table based on the
Constraints.i.e if we want to load the EMP&DEPT data, first it loads the data of DEPT
then EMP because DEPT is PARENT table EMP is CHILD table. In simple terms, it
loads PARENT table first then CHILD table.
In a joiner transformation, you should specify the source with fewer rows as the
master source. Why?
Ans: Joiner transformation compares each row of the master source against the detail
source. The fewer unique rows in the master, the fewer iterations of the join comparison
occur, which speeds the join process.
What is Incremental Aggregation?
Ans: Whenever a session is created for a mapping Aggregate Transformation, the session
option for Incremental Aggregation can be enabled. When PowerCenter performs
incremental aggregation, it passes new source data through the mapping and uses
historical cache data to perform new aggregation calculations incrementally.
What is the default join that source qualifier provides?
Ans: Inner equi join.
What are the options in the target session of update strategy transformations?
Ans:
Insert
Delete
Update
Update as update
Update as insert
Update else insert
Truncate table

2. Which transformation should we use to normalize the COBOL and relational
sources?
Ans: Normalizer Transformation.
What is the use of tracing levels in transformation?
Ans: Tracing levels store information about mapping and transformations.
What are the basic needs to join two sources in a source qualifier?
Ans: Two sources should have primary and foreign key relationships. Two sources
should have matching data types.
What is update strategy transformation?
Ans: This transformation is used to maintain the history data or just most recent changes
in to target table.
 Informatica Interview Questions Collection 2
 Informatica Interview Questions Collection 1
 Informatica ETL Interview Questions
 IBM Informatica Technical Questions
 Informatica Interview Questions Collection
 Informatica Technical Questions Collection