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

ETL Interview Questions

Questions Answers Views Company eMail

What are the new features of informatica 9 version?

2 8658

What is Relational Integrity?

1 4090

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

1 4500

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

1 12270

How to Check the source record count from traget table.

IBM,

5 14262

how to load the data to fact table?

2703

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

IBM,

2495

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 7838

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,

2358

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 6799

What is the main difference between peek stage and copy stage

2 18795

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 8434

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

1993

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,

2555

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 5183

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Un-Answered Questions { ETL }

Do we need an ETL tool? When do we go for the tools in the market?

960

SCD2 will work on only dimension tables as well as fact Table?

1401

what are the concerns of OLTP and DSS systems?

1962

how do use session mapping parameters ?(in which transformation)

2014

Explain do we need an etl tool? When do we go for the tools in the market?

1013

How many types of transformations supported by sorted input?

1222

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

2239

where we cannot use sorter Transformation. if we use then we will not get correct data?

2199

What is fact? What are the types of facts?

1117

What is a mapping?

988

Define slowly changing dimensions (SCD)?

1060

Explain about etl data integration software?

887

dimension object created in oracle can be imported in designer?how?

2989

What are the types of Data Warehouse applications?

1025

what make u disappointmnets in u r career

2197

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