Explain what is the limit to the number of sources and targets you can have in a mapping?
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Store (and count) non-fact records?
What is called dimensional modelling?
What are the mapping paramaters and maping variables?
Explain what are non-additive facts?
Explain what is a three tier data warehouse?
What is a general purpose scheduling tool?
Explain the main difference between inmon and kimball philosophies of data warehousing?
Hi Guys, I have been to L& T last week ..Please find the questions mentioned below 1)Slowly changing dimension types 2)DML statement 3)DDL statement 4)write a syntax to create database 5) differences between count(*) and count(column) 6) differences between union and union all 7) what is decode 8) what is NVL 9) Arrange the values in ascending order 10,5,20,15,null 10)Primary and surrogate key 11)what is group by clause does? 12)what is difference between truncate and delete 13)what is difference between OLAP and OLTP ? 14)Architecture of Datawarehouse 15)how do you test the data validation from source as (flat file and xml) to staging tables. 16)what is shedule and time bound the mentioned above question asked in two rounds.all the best
What is fact less fact table? Where you have used it in your project?
Explain the advantages of raid 1, 1/0, and 5. What type of raid setup would you put your tx logs.
What is data merging, data cleansing and sampling?
What is a staging area? Do we need it? What is the purpose of a staging area?