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Data Warehouse Interview Questions
Questions Answers Views Company eMail

what is confirmed fact?

2 18648

We can achieve better perfomance using sorter before an aggragator. Then what is the significance of 'Sorted Input' check in aggregator ?? Please let me know the difference ??

2 6316

in general which algorithms for used?

2037

i have the source from Uk,north america how can i pass the data two tables based on the locations

2 6469

what is difference between mapping and mapplet ?

TCS,

2 18011

What is confirmed fact in dataware housing?

Hewitt, TCS,

2 6995

How to write duplicate records into a separate dataset using sort?

HSBC,

4 12747

Hot to suppress characters from a given string?

CTS,

4 9913

1. if lookup tr is giving poor performamence. what u do. 2. i have emp,dept table. i want output ename,empno,dname,max(sal). 3. can any one tell me project flow in real time scenario. please send me mail any queries and answers my mail id is yaparala@gmail.com

HCL, iGate,

2 6820

How to Explain My project flow,In TCS ased me this question. In which way i can start my project flow and they asked how many fact tables and dimensional tables u used. Can any one Explain Briefly for this question and project architecture also.. please..

CTS, HCL, Infosys, TCS,

3 22776

There are 4 flat files with number of records as indicated below. Which files should be picked first for joining using joiners so as to get best performance. File A - 1000 records File B - 100 records File c - 10000 records File D - 10 records Please explain. Thanks and Regards,

Amdocs,

1 7633

The structure of source file is as below: Source structure(two fields) Name, Card NUmber A, 111111111(SSN) A, 01010101(Creditcard number) A, 34343434(Debit card number) B, 55555555(Creditcard number) C, 77777777(Debit card number) Target Structure(4 fields) Name,Credit card,SSN,Debit card A,01010101,111111111, 34343434 B,55555555,, C,,,77777777 Corresponding to one name there can be maximum 3 rows and minimum zero rows. Given that I do not know which record might have a particular type of number. How can I handle above requirement with informatica transformations?

Amdocs,

1 7441

If I have set the property Treat Source Rows as Insert and for the target properties I have checked the boxes Update as Update, what will happen to incoming rows? What exactly is the use of these check boxes and in which scenarios we use them. Also what is the sequence in which informatica understands these properties.Does it takes whatever is defined in treat source rows as property or it is in any other way. Please explain.

Amdocs,

3 21319

What is the difference between SQl Loader and OCI in datastage?

CSC,

2 14869

I have a source like file it have Number of records and i want to load without first and last records in target?Datastage?

CSC,

4 15739


Un-Answered Questions { Data Warehouse }

Are data mart and dwh normalized or denormalized? Do both of them exist in the same tier?

1068


what the mean of version error in crystal?

2406


what is repositery?

1857


Can you run multiple rpd’s in a single obiee instance?

797


What do you mean by Drill down and Drill Up?

1017


What is meant by a Virtual Disk?

1154


How can we run the graph? What is the procedure for that?

958


How the ipc stage work?

1141


What is a connected transformation?

1145


How to identify ppi columns?

1197


my report ended at the half of the last page but i don't want that matter in the last page I would like to adjust the matter in the previous page .how can i do this?

2012


explain the difference between proc means and proc summary?

1138


What are the general problems that are faced while importing the .biar files and what is the solution to overcome it in business objects?

2925


What are templates in which way it is help full?

1007


where is the cache (lookup, index) created and how can you see it.

2027