Informatica Live Interview Questions

Here are some of the interview questions i could not answer, any body can help giving answers for others also.
thanks in advance.

Explain grouped cross tab?
Explain reference cursor
What are parallel query's and query hints
What is meta data and system catalog
What is factless fact schema
What is confirmed dimension
Which kind of index is preferred in DWH
Why do we use DSS database for OLAP tools

Questions by kiran_stealth@yahoo.com

Showing Answers 1 - 8 of 8 Answers

confirmed dimension ==  one  dimension  that  shares with  two fact table

factless   means  ,fact table  without   measures  only  contains  foreign  keys-two  types  of  factless  table   ,one  is  event  tracking   and  other  is   covergae  table

Bit map  indexes  preffered  in  the  data ware  housing

Metedata  is  data  about  data,  here  every  thing  is  stored  example-mapping,sessions,privileges  other  data,in  informatica  we  can   see  the  metedata  in    the   repository.

System  catalog  that  we   used  in  the   cognos,that   also  contains   data,tables,privileges,predefined   filter  etc,  using  this   catalog  we   generate  reports

group  cross  tab  is   a  type   of   report  in  cognos,where  we   have  to assign 3  measures  for  getting   the   result

  Was this answer useful?  Yes

Mehul Thakkar

  • Apr 18th, 2006
 

Hi Bin,

I doubt your answer about the Grouped Cross Tab, where you said 3 measure are to be specified, which i feel is wrong.

I think that grouped cross tab has only one measure, but the side and row headers are grouped like

                          India              China

                      Mah | Goa        XYZ | PQR          

2000                20K   30K         45K    55K

2001                39K    60K        34K    66K

Here the cross tab is grouped on Country, and then State.

Similary even we can go further to drill year to Quarters.

And this is known gruped Cross tab.

     

       

  Was this answer useful?  Yes

Arun

  • May 25th, 2006
 

The cursor which is not declared in the declaration section but in executable section where we can give the table name dynamically there.so that the cursor can fetch the data from that table

  Was this answer useful?  Yes

Siva

  • Jun 18th, 2006
 

grouped cross tab is the single report which contains number of crosstab report based on the grouped items. like

Here countries are groupe items.

INDIA

 

M1

M2

Banglore

542

542

Hyderabad

255

458

Chennai

45

254

 

 

 

 

 

USA

 

M1

M2

LA

578

5876

Chicago

4785

546

Washington DC

548

556

 

 

PAKISTAN

 

M1

M2

Lahore

457

875

Karachi

458

687

Islamabad

7894

64

 Thanks

                 

 

 

 

  Was this answer useful?  Yes

Prasad

  • Jul 14th, 2006
 

Hi,

Rest of the answers are given by friends earlier.

DSS->Decision Support System.

The purpose of a DWH is to provide users data through which they can make their critical besiness decisions.

DSS data base is nothing but a DWH. OLAP tools obviously use data from a DWH which is transformed to generate reports. These reports are used by the users, analysts to extract strategic information which helps in decision making.

  Was this answer useful?  Yes

Pavan Amaraneni

  • Nov 24th, 2006
 

The Default Index type for DWH is bitmap(non-unique)index

  Was this answer useful?  Yes

Give your answer:

If you think the above answer is not correct, Please select a reason and add your answer below.

 

Related Answered Questions

 

Related Open Questions