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Question 
what is meant by roll up and roll back in dataware housing????
 Question Submitted By :: Sendtoajaykumar
I also faced this Question!!     Rank Answer Posted By  
 
  Re: what is meant by roll up and roll back in dataware housing????
Answer
# 1		 
roll up means moving up one level in the specified 
hierarecy.,ex:time dimension
year-quarter-month-day
moving from month to year is rollup

i think there is no roll back in DW
 
Is This Answer Correct ?    0 Yes 0 No
Ajay
 
  Re: what is meant by roll up and roll back in dataware housing????
Answer
# 2		 
There is rollback in DW.For example when you delete some 
thing from any one of your table from your data base before 
commit you can get back your deleted information by using 
rollback.
 
Is This Answer Correct ?    0 Yes 0 No
Veeru
 
 
 
  Re: what is meant by roll up and roll back in dataware housing????
Answer
# 3		 
roll up means going from lowlevel concepts to high level
concepts and drill down(roll back) means going top to 
bottom in concept hierarchies
 
Is This Answer Correct ?    0 Yes 0 No
Scaant
 

 
 
 
Other Cognos Interview Questions
 
  Question Asked @ Answers
 
how data modeling is usefull to cognos?  1
cognos is holap or molap or rolap Cognizent4
How will you migrate your reports to QA environment? Satyam2
what is field set? what is the query calculation and layout calculation? Syntel1
can reportnet supports cubes??? Wipro2
Can we create reports using OLTP database?How?  3
How to create multilingual reorts?  4
difference between imprompt and reportnwt1.1 HSBC1
What is slowely changing dimensions?why we are used SCD?  1
what is query subject TCS3
How we check the errors before running the report,plz let me know the answer TCS2
Once reports are delivered to client, how will they inform back? If they are experiencing any problem in the reports.  1
Explain the different stages in creating a report in cognos report net?  1
Why we take so long time to display date prompt before displaying a report? How can we reduce the time?  1
advantages of cascade prompt ??? iFlex4
What is slicer & dicer ? what is sub session parameter ?  1
what are typees of dimensions HCL6
How can we improve performance in framework manager level? Wipro2
How can I convert a list report/Cross tab Report in Cognos EP series into a bar chart or pie chart etc.  1
How to do deployment?  1
 
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