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 12271

How to Check the source record count from traget table.

IBM,

5 14263

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 7842

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,

2362

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 18798

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 8436

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 5185

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Un-Answered Questions { ETL }

how do u really know that paging to disk is happening while u are using a lookup transform?

2428

what is Forward,Reverse and Re_engineering?

2251

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

1197

hoe to access second value in mapping parameter if it is having more than one value ?????????????

1539

list and discuss two approaches for updation of target table in Informatica and how they are different.

2110

how many steps are there in etl process?

981

How many steps etl contains explain with example?

970

What are the different Lookup methods used in Informatica?

919

What is a mapping, session, worklet, workflow, mapplet?

985

What are the differences between sql override and update override?

1100

how do u extract data from different data sources explain with an example?

2244

What are the different etl testing categories as per their function?

1078

how to load the data to fact table?

2703

how do u set partition points in the mapping?

2239

what are the reports developed in sap bw project and what is the requirement for developing it?

2178

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