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Data Warehouse Interview Questions
Questions Answers Views Company eMail

difference between source based commit? and target based commit? which is better with respect to performance?

IBM,

6 19129

difference between shortcut and reusable transformation?

2 10108

how can we perform incremental aggregation?explain with example?

IBM, TCS,

9 23594

Can anyone please send me the latest informatica dumps (power center 8.1.1) for all the three exams? My mail id is yokilamai@gmail.com

1 4494

If I have table T1 and table T2 T1 has 250 cols and 10,000 rows T2 has 2 billion rows and 10 cols Which one would be Fact table and which one would be Dimension table and why ?

Extech, Principal Finance,

3 9304

Select * from emp,dept,loc where emp.deptno left outer join dept.deptno and dept.locno=loc.locno. No need to consider the syntax but is it possible to have left outer join and equi join in the same SQL like this ? can we have right outer join and left outer join in the same SQL ---

Principal Finance, PT Metalogix Infolink Persada,

1 7804

working with Business Objects 6.1(a), i m facing a problem. when i save the BO report containing chart aswell as table in .xls then the null vlues in the table automatically are converted to 0, thereby istorting the chart also. please provide me the solution as soon as possile.

1 4660

What is max core value ? what is the use of it?

JPMorgan Chase, Wipro,

2 26957

In Join component which record will go to unused port and which will go to reject port ?

JPMorgan Chase,

3 26964

What would the following datastep do? Data _null_; Set Dist end=eof; Call Symput("xx"!!left(put(_n_,2.)),&dimension); If EOF then Call Symput('numrows',left(put(_n_,2.))); Run; dimension is a macro variable that is being passed here

2 6539

if we increase the number of dimensions will the rows in fact table increase or decrease??

IBM,

3 9592

Which is the optimized method of extracting the data.

3 7341

How to handle time period attribute for time dependent data?? a.)add time period as a part of pk b.)add time period simply and make it nullablec.)add time period simply and make it not null.

1 4220

How to handle time period attribute for time dependent data?? a.)add time period as a part of pk b.)add time period simply and make it nullablec.)add time period simply and make it not null.

IBM,

1 5556

Business rule implemntation depends on? 1.)ETL requiremnts 2.)ETL performance 3.)business requirements.

4 8037


Un-Answered Questions { Data Warehouse }

How can we remove the duplicates from flat file source?

1040


What are batches?

1100


how we can generate cubes in cognos?

5


How can we check the version of Teradata that we are using currently?

1067


------------- How to identify the Revenue Column in Report?

2387


Source table has 5 rows. Rank in rank transformation is set to 10. How many rows the rank transformation will output?

1075


can any one explain me what i have to tell about insurance project in interview,,,,when he asked to tell about ur project

2518


Why is chameleon method used in data warehouse?

1166


How many project sources we can create in metadata?

1091


Explain how to export mappings to the production environment?

977


Hi, There is a session in my workflow which is running for a long time, atlast we found the cause is the missing index. My session is running via a stored procedure. Can I create an Index on the table which the stored procedure is using while my session is running? Please suggest. My Informatica version is PC 8.0.6 My Oracle APPS is 11.5.3. Thanks,

7186


Define enterprise data warehousing?

1204


What are the processing stages?

1099


What are the various transformation available?

1012


Separate from a database, an information bazaar, and an information stockroom?

1089