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Data Warehouse General Interview Questions
Questions Answers Views Company eMail

Difference between slicing and dicing with example?

 2 16659

waht is the advantage of infoset query

iGate,

1911

what is the diffrence between psa and idoc

iGate,

1730

Can we have more than one time dimensions in a Schema(Star or Snowflake)

ASD Lab, IBM,

1 5700

Compare and contrast aggregates & indexes

IBM, TCS,

3353

Compare aggregates and data marts

TCS,

2285

what role views play in dimensional modeling?

TCS, Zensar,

1 5169

how to calculate sum(sal) with out using aggregator satge

HSBC,

3 7795

what are the all possible features supported modify stage?

 1620

what is the synchonus? wht is the diff between synchronous and asynchronous what is the diff between v1 and v2 v3 delta modes in sap ecc

IBM,

2062

in general which algorithms for used?

 1564

Hi Guys, I have been to L& T last week ..Please find the questions mentioned below 1)Slowly changing dimension types 2)DML statement 3)DDL statement 4)write a syntax to create database 5) differences between count(*) and count(column) 6) differences between union and union all 7) what is decode 8) what is NVL 9) Arrange the values in ascending order 10,5,20,15,null 10)Primary and surrogate key 11)what is group by clause does? 12)what is difference between truncate and delete 13)what is difference between OLAP and OLTP ? 14)Architecture of Datawarehouse 15)how do you test the data validation from source as (flat file and xml) to staging tables. 16)what is shedule and time bound the mentioned above question asked in two rounds.all the best

L&T,

2 6780

what is hybrid schema

TCS,

4 15127

How many ways we test the universe & Report?

 2 5060

In datastage can ve find the job based on source table name ??

TCS,

1 8657

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Un-Answered Questions { Data Warehouse General }

What is conformed fact?

636

Describe a data warehouse.

555

Explain what are snapshots? What are materialized views & where do we use them? What is a materialized view log?

530

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

566

What are session timeout and application timeout? Where we have to do this process?

608




Explain what are the advantages data mining over traditional approaches?

696

Explain are data mart and dwh normalized or denormalized? Do both of them exist in

600

What are the steps to build the datawarehouse?

590

Explain what is what are semi-additive and factless facts and in which scenario will you use such kinds of fact tables?

523

What is normalization, first normal form, second normal form, third normal form?

542

Which technology should be used for interactive data querying across multiple dimensions for a decision making for a dw?

594

What is data warehouse architecture?

584

What should I have in mind when building olap solution from scratch?

545

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

524

What is the difference between connected and unconnected stored procedures?

561

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