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

My Source qualifier has empno, sal. Now my mapping is like SQ(EMPNO)->AGGR->EXP->TARGET SAL ------------>TARGET ? means only one source qualifier has 2 columns like empno, sal. connected to same target as shown in above mapping.Is this mapping valid or any issues are there if we design like this?

Span Systems,

2 5274

how to design mapping half of source table records into one target and remaining half into another target

ABC,

8 15726

there is a product table prodid prodname price 100 cinthol 10 101 hamam 10 102 neem 20 103 cake 30 in the above table the price of some products are duplicated and some product prices are distinct we want to push the duplicated prices to one target and non-duplicated prices to other target without using expression and sequence generator transformation

4 7103

performance wise which one is better in joiner and lookup transformation?why?explain clearly?

IBM,

4 21698

There is a table with emp salary column how to get the fields belongs to the salary greater than the average salary of particular department. Write a query

IBM,

7 13023

My source has 100 records. I have targets say in number 5. all target tables has parent and child relationships in between themselves. Now I want to load all 100 records into all targets. How U can ensure that record inserted in parent and then loaded into child.

Cognizant,

3 9711

How your source files are coming to your ETL server. Actually at which stage of your mapping it is happen.

Cognizant,

1 7197

Why Info School? BUILD YOUR CAREER WITH RIGHT GUIDANCE AND SUPPORT

2194

I've a denormalized table EMP(empno,ename,phone,addr1,addr2,fax,email). Now I want to insert the record into target in the format that, there will be 2 target rows for 1 source record. In target the row needs to be inserted as: ROW1: empno,ename,addr1,phone ROW2: empno,ename,addr2,fax,email And I'm not allowed to normalize transformation. How to achieve?

IBM,

1 4873

Input is like 1 1 1 2 2 3 and out put should be 1 2 3 How can u acheive using rank transformation ??

IBM,

3 9010

What is the default join strategy in Teradata???

IBM,

5 25677

Can we have two time dimensions in a schema(either star or snow flake)? For ex if we want joining date of employee and if we want today's sales with time whether can we have two time dimensions for accommodating above tasks?

IBM,

1 2228

In my source i have 10 records but i want 11 records in target. How can i acheive this in Server jobs.

IBM,

2 7922

3 6664

lookup transformation with screenshots

TCS,

1 4066

Un-Answered Questions { Data Warehouse }

Tell me about your experience in informatica? what is best mark you can give yourself? How to answer this question?

8288

Hi, Does anybody has lastest SAS certification(base, adv., clinical)dumps,if anybody has please email me at mailtorajani76@gmail.com. Thanks

2313

how to generate the test data in sas without input data? : Sas-administrator

1207

Explain what is aggregate table and aggregate fact table ... Any examples of both?

1178

explain in detail about type 3?

1091

Explain in detail about scd type 1 through mapping.

1646

Source has 2 columns: USA,NewYork INDIA,MUMBAI INDIA,DELHI UDS,CHICAGO INDIA,PUNE i want data in target like below: INDIA,MUMBAI1 INDIA,DELHI2 INDIA,PUNE3 USA,NEWYORK1 USA,CHICAGO2

847

Explain about a time when you discovered a more efficient way to do a work task?

1224

i'm searching on cognos..i want to know real time scenarios..persons having real time exp or undertaking trainings or who searching on cognos...can send me the details...for proper guidence..for project and interview preparation..pls help me out..my mail-id is ammu2india@gmail.com..hope u will respond as soon as possible..thanks..

2771

Hi all , I am planning for informatica S - PowerCenter 8 Mapping Design certification. I have rewuired the dumps for the same. if anyone of you having the same pl. share it with me. This will be of great help. My contact is : sagardev7@gmail.com TIA , Sagar

2825

How do you load first and last records into target table? How many ways are there to do it? Explain through mapping flows.

1202

Does anybody have the sample of delivery document of cognos, or provide some link of websites Thanks

2095

how many reports have u created ? explain a few.

2162

create a job that splits the data in the Jobs.txt file into four output files. You will direct the data to the different output files using constraints. • Job name: JobLevels • Source file: Jobs.txt • Target file 1: LowLevelJobs.txt − min_lvl between 0 and 25 inclusive. − Same column types and headings as Jobs.txt. − Include column names in the first line of the output file. − Job description column should be preceded by the string “Job Title:” and embedded within square brackets. For example, if the job description is “Designer”, the derived value is: “Job Title: [Designer]”. • Target file 2: MidLevelJobs.txt − min_lvl between 26 and 100 inclusive. − Same format and derivations as Target file 1. • Target file 3: HighLevelJobs.txt − min_lvl between 101 and 500 inclusive. − Same format and derivations as Target file 1. • Rejects file: JobRejects.txt − min_lvl is out of range, i.e., below 0 or above 500. − This file has only two columns: job_id and reject_desc. − reject_desc is a variable-length text field, maximum length 100. It should contain a string of the form: “Level out of range: ”, where is the value in the min_lvl field. My Question is how do you write the stage variable for reject rows.

2816

can anyone provide link to download cognos 7.2 version for download along wiht installation and configuration steps tx in advance

2306

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