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Data Warehouse Interview Questions
Questions Answers Views Company eMail

What happen if you have 3 ports in SQ and 4 ports in SQL override of SQ( provided all ports are in same order and they are connected with proper source and target)? Also what happens when I have 4 ports and will extract 3 values in SQloverride.. What will be the value in 4th port ?

CTS,

1664

how lookup transformation is made active in new versions... When to use connected and when to use unconnected lookup and why? which is good for session performance. How to make lookup persistent and how to remove stale data from that lookup. how commit works - when we stop or abort data. Explain in both cases. What is factless fact table and have you ever used it in real time scenarios.

CTS,

1688

I have 10 columns in a flat file and 10 rows corresponding to that columns. I want column number 5 and 6 for last five records. In unix as well as informtica.

CTS,

1641

What if i will group by with some port in aggregator and will not pass the sorted values. Will the session fails tell in both cases ( if i have configured it for sorted input and if i have not configured it for sorted input).

CTS,

1 2390

How to write a expression to display the first letter in Caps in each word using transformer stage ? Please let me know ASAP Thanks in advance...

Alpharithm Technologies,

1507

How to load specific no.of records using bteq, or fastload,or multiload

Infosys,

1747

What is the difference between a utility and api in a RUN SQL component

Accenture,

1 8333

What is use Array size in datastage

1779

can i any one explain me realtime healthcare project explanation..for interview .iam new to informatica .thanks in advance.

3870

Hi, Please tell me how to solve this scenario in datastage ? Here we have 3 columns in a table TEST CODE,ENTRY DATE and BATCH The table looks like CODE ENTRYDATE BATCH 100 100716 1 100 100716 1 100 100716 1 200 122517 2 200 122517 2 302 555555 8 302 555555 8 302 555555 8 We need to create a seqno on grouping these 3 columns. The result should be like this. CODE ENTRYDATE BATCH SEQNO 100 100716 1 1 100 100716 1 2 100 100716 1 3 200 122517 2 1 200 122517 2 2 302 555555 8 1 302 555555 8 2 302 555555 8 3

Alpharithm Technologies,

1 3541

Workflow is long running due to long running sql query so when we refer the query plan it tells the issue is due to partition of the db table. How to handle this?

1674

If the job aborted in a sequencer, how can we start that from the previews successful job.

SLK Software,

1 3426

What is the size of database for you project?

Accenture,

1597

we have a list of 80,000 records, i would like to display in excel sheet but excel sheet has capacity of 60000 record.. how you going to display?

Accenture,

2 2927

New coloums are added in database, then how you know in report level

Accenture,

1555


Un-Answered Questions { Data Warehouse }

What are the main components of teradata system?

1135


Name the types of transformation?

954


What are the features of datastage flow designer?

1039


Please let me know how to make encryption and decryption with example?

1900


what is index?how it can work in informatica

2040


What is level prompt?

959


What is the difference between router and filter?

1269


What is the return type of lookup_not_loaded() ? Does it return 0 or 1 to signify true or false or does it return index ...can someone please explain.

1373


What is the dense rank?

1231


What are the advantages and disadvantages of reporting directly against the database?

982


How to limit the cut,copy and paste operations for an user in reportlevel? Can anyone please send me the steps as i am new to cognos?

2572


how do you debug and test your sas programs? : Sas programming

1124


What is meant by drill down?

977


Why cognos decision stream is used?

1159


Hyperion is the one of the tool in data ware house. Its an olap tool. Why you cant display that tool?

1020