ETL Interview Questions
Questions Answers Views Company eMail

Hi my name is kuldeep singh, i have finished my B.E in computer science and engg in 2008. I have worked with accenture for 17 months and because of family problem i left the job in dec 2009.. i was in data ware housing capability. right now i am working in a BPO as technicla support executive,, i want to move to IT again, please suggest me what shuld i do? its been 1 year gap and i am not able to get into IT...please suggest me ...should i go for informatica certification will that help me to get inot IT. please give ur suggestion..my E mail is is singh.kuldeep2004@yahoo.in

1972

What is Data Vault???

2492

What is factless fact schema?

3 6477

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

1548

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

1972

we hava a flat file having more than 1000 records and two targets. i have to write first half of the rows into first targets and next half of rows into second target. how can i do in informetica??

1 5051

we hava more than 1000 records. i have to select first 5 record, last 5 record and 5 records from middle of the source. how can i do in oracle as well as in informetica??

4 7880

I have a Flat file with more no. of Records also including duplicate values. But i need distinct values to one target and remaining records to another target in Informatica way

2 5236

WHY CANT WE SEE THE DATA IN DATASET

IBM,

1 5329

can u please tell me about ........ how can explain my project before interviewer my projects are insurence domain & sales domain?

1909

what are the types in error loging?

Cap Gemini,

1797

IN Informatica, I have 10 records in my source system. I need to load 2 records to target for each run. how to perform.please let me know. I know by using Mapping variable we can perform but how to load please any one explain.

TCS,

3 12895

how to answer the question "explain project architecture" in informatica pls any one who has the answer pls send the answer to this mail id "karumanchisrinu@gmail.com

TCS,

2 17307

flat filevalidation in informatica

Hewitt,

1895

how to connect to a flatfile through ftp in informatica

TCS,

1 13736


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Un-Answered Questions { ETL }

How many types of transformations supported by sorted input?

877


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

840


what is pmrep command?

11092


Two default user groups created in the repository are____and_____.

1797


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

958






What is fact? What are the types of facts?

695


How many steps etl contains explain with example?

649


Explain what is etl process? How many steps etl contains explain with example?

658


What is full load & incremental or refresh load?

934


what is the difference between cardinality and Nullability?

2691


1.Identify and discuss the problems which are occurred during data quality verification for the single-source and multi-source problems. 2.Testing has very important role in DWH. In ETL testing phase, how can we perform the integration testing and regression testing? 3.What are the perquisites of system testing and regression testing in ETL phase?

2012


When do we go for the tools in the market?

710


What do you understand by active and passive transformations?

697


Explain and compare etl & manual development?

673


Give the benefits of data integration suite?

672