what is Forward,Reverse and Re_engineering?
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what is the difference between OLTP database and data warehousing database?
Eliminating of duplicate records without using dynamic lookups
What are your responsibilities as an etl tester?
Explain the use lookup tables and Aggregate tables?
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explain the methodology of Data Warehousing?(Polaries)
What are the ETL Testing Operations?
What are the names of the layers in etl?
What are dimensions?
What is data cleaning?
Assume u have a 24CPU machine with 24GB RAM, suggest how u would like to configure Informatica ,like number of concurrent sessions, RAM requirements etc,max partitions that u would permit per mapping.
Difference between flat files and relational sources?
Teradata 
