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

Teradata (490)
Business Objects (875)
Cognos (1143)
Informatica (2428)

SAS (1049)
Micro Strategy (282)
ETL (315)
OBIEE (92)

Data Warehouse Interview Questions

Questions Answers Views Company eMail

What is a candidate key?

7 16140

Suppose we have a (assume relational) source table Product_Id Month Sales 1 Jan x 1 Feb x . . . . . . 1 Dec x 2 Jan x 2 Feb x . . . . . . 2 Dec x 3 Jan x 3 Feb x . . . . . . 3 Dec x . . . . . . and so on. Assume that there could be any number of product keys and for each product key the sales figures (denoted by 'x' are stored for each of the 12 months from Jan to Dec). So we want the result in the target table in the following form. Product_id Jan Feb March.. Dec 1 x x x x 2 x x x x 3 x x x x . . So how will you design the ETL mapping for this case , explain in temrs of transformations.

Accenture, VAMA,

5 10816

Can anybady tell me , what is the aggrigate awareness.how to use it . could u plz give me the practical example.

TCS,

4 7510

Which is the best training institute for SAS in Delhi. Please reply

HCL, HSBC,

12 26788

In a simple mapping when i use aggregate t/r with out any condition or group by, i am getting output as only last record in the table . can any one explain it please.........?

4 7089

How can i set break points in debugging mode ? can explain steps please?

ABC, TCS,

1 14542

SO many times i saw "$PM parser error " .what is meant by PM?

1 8687

CAN ANY ONE TELL ME THE ARCHITECTURE OF DATASTAGE CLEARLY....

Wipro,

2 17191

Hi..I have COG-112(Report Author),COG-122(Admin),COG-132(Meta data modelling). I took test end of Sep '09.I got 100% wcore with these dumps. If any body need then mail me on kris.bi121@gmail.com

2 4399

How can we use multiple data providers in a single report in business objects?

2 8004

Can more than 1 metric be applied on an analytic in business objects?

2231

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

IBM,

2975

In my project source data comes from MAINFRAME in files.so,This time data is coming as a binary file...I know for binary data we use Complex flat file stage..I have used it also..but on 'view data' data is not coming correctly..as it in MAINFRAME.give me some ideas..

2 11734

Please tell me which institute is the best to study Informatica and asp.net in chennai Also please send me the latest interview questions in asp.net,c# and sql server to my id ramtryin@gmail.com

2100

i have a table like empid ename year month sal 1 x 98 jan 500 1 x 98 feb 500 1 x 98 mar 500 1 x 99 jan 600 1 x 99 feb 600 2 y 98 jan 600 2 y 98 feb 600 2 y 98 mar 600 2 y 99 jan 700 2 y 99 jan 700 and so on i want to find out totsal for every emp on year wise plz help me

Magna Infotech,

4 11039

Un-Answered Questions { Data Warehouse }

What are the tools available for etl?

1032

What are the types of hashed files in data stage

1146

What is the difference between datawarehousing and businessintelligence?

1145

What system options would you use to help debug a macro? : sas-macro

1156

-Which expression we can not use in Maplets?, -Can we join(relate) two dimensions in a schema? -Why and where we use 'sorted input' option?

5886

What is upsert statement in teradata?

1198

How will effect the changes for a report , if for certain users only the column heading in the report should be changed?

851

Define Pmrep command?

1118

To see hidden files in LINIX?

1593

What are the modules in Power Center

1726

What is metadata in context of a datawarehouse and how it is important?

1098

How to stop/start redshift cluster?

What are the data types present in bo? What happens if we implement view in the designer n report?

996

What is the difference between aggregate table and materialized view?

1144

Hi All , in PX Job I have passed 4 Parameters and when i run the same job in sequence i dont want to use those parameters , is this possible if yes then how

1607

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