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ETL Interview Questions
Questions Answers Views Company eMail

What are the new features of informatica 9 version?

2 6957

What is Relational Integrity?

1 2798

working of line item dimension......pls,tell overall flow

1 3005

If you concatenate data from a normalizer transformation,the ports you concatenate cannot include OCCURS(T/F).

1 10140

How to Check the source record count from traget table.

IBM,

5 10003

how to load the data to fact table?

1749

Can anyone explain me a scenario from banking and finance...more precisely a mapping

IBM,

1646

How to load Session Statistics (Workflow name, TgtRows, Rejected Rows, SessStartTime,SessEndTime..)into a database table ?? Another Question: I want to pass values from oracle table or Flat file in Mapping parameter/Variable.. What is the method for that..Please provide me the solution step by step

1 6176

give detail on the sales project how many number of dimensions & fact tables are used in projec briefly. how the four fact tables taken in the project.

HCL,

1497

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 4461

What is the main difference between peek stage and copy stage

2 14895

Hi please try to reply with answer. my mail id is raghu.1028@gmail.com. if the source is having millions of records, but having theree target tables. As per user the first record need to insert into first target and second record in to a second target and third into third target, similarly the process needs to repeat?

5 5489

Knowledge on what are the improtant characteristice that we need ot consider while developing an ETL Code

1172

diff b/w dwh & data mart diff b/w star schema & snow flake schema diff b/w fact table & dimension table what are the contents in requirement specification what are the docs needed for testing draw ur proj architecture

L&T,

1616

indatastage 8.1 surrgoate key generates seqences numbers write but there is limite value i want to reset the seqence after gettting some highest value like i want o/p like this 1 2 3 4 5 .............10000 1 2 3.........10000

TCS,

1 3111


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Un-Answered Questions { ETL }

Can anyone explain me a scenario from banking and finance...more precisely a mapping

1646


How to recover a workflow? What are the different approaches?( In prod i.e no access to modify)

378


what is granularity in Data ware House?

552


What is a staging area? What is the purpose of a staging area?

128


Identifying the bottlenecks in various components of Informatica and resolving them.

1078






Explain me ETL project architecture in Detail?

1455


What are three tier systems in etl?

144


what is the difference steps for data modeling?

1649


How many types of transformations supported by sorted input?

170


what is the main role of FI on business

1195


how would u estimate the size of Aggregator transform data and index cache?

1117


two sources S1,S2 containing measures M1,M2,M3, 4 dimensions D1,D2,D3,D4, 1 Fact F1 containing measures M1,M2,M3 and surrogate keys K1,K2,K3,K4 (a) write a sql statement to populate Fact table F1 (b) Design a mapping in Informatica for loading of fact table F1.

1209


Hi, I've a mapping with flat file source The target update override property for the target table is using update stmt. There is no update strategy between source and target. Also The session has the target properties as Insert , Update as update options checked. Does this mean that recs will be inserted only and the update override will not be applied at all. Thanks

949


what is the use of structures?how many nodes can u create in a structure?

1331


what are the production issues in datastage?

8757