Data Warehouse General Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Data Warehouse General Interview Questions

Questions Answers Views Company eMail

Hi, If any hav Informatica n DWH FAQ's,Plz do fwd to s.rajanikanth1980@gmail.com Thnx Vani

2275

how much memory space occupied real time project (roughly)?

2228

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 9316

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 7806

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

IBM,

3 9610

Which is the optimized method of extracting the data.

3 7357

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 4228

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 5563

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

4 8053

what are the similarities between ROLAP and MOLAP

Siemens,

2 14764

in siebel analytics by using dashboard prompts in a page have 2 reports so i have to give dashboard prompt to applied on first report only that will not applied to 2 report how it will do

IBM,

1 4826

What's a Cube in Rolap?

Oracle,

2 11791

capital of tamilnadu

Wipro,

6 9642

hi i have 2 users and 4 reports in dashboard.i have to give rights 2 reports for every users. is it possible give the rights in dashboard.if yes plz let me know how is it possible . thanks in advacne for appreciation. bye rohit

L&T,

2052

If your client approaches you and says that he wants to create a Datawarehouse, and provides just the info regarding his source systems. What are all the neccessary actions one is supposed to take/understand and get back with a comprehensive document which convinces the client to proceed with the DW initiative. What are all the documents we need to provide the client?

CSC,

1 6630

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Un-Answered Questions { Data Warehouse General }

Difference between e-r modeling and dimentional modeling?

941

Can any one explain about core dimension, balanced dimension, and dirty dimension?

1057

What is the limit to the number of sources and targets you can have in a mapping?

1111

Explain why dimenstion tables are denormalized in nature?

920

What is analytical or analytic mean?

1130

How to calculate fact table granularity?

1025

What is difference macros and prompts?

2313

What are the differences between datamart vs. Reporting cube?

1102

Explain is fact table?

939

Explain where do we use semi and non additive facts?

1022

I need to set predefined condition. How I do this?

1018

Explain what are the possible data marts in retail sales?

1015

What is the difference between a primary and secondary actor in use case modeling?

1067

What is a source qualifier?

1113

What is a staging area? Do we need it? What is the purpose of a staging area?

1000

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