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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 ?    1 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 ?    2 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 ?    1 Yes 2 No
Scaant
 

 
 
 
Other Cognos Interview Questions
 
  Question Asked @ Answers
 
-------------------What is StarShema? Cap-Gemini1
Can we create reports using OLTP database?How?  3
What is Cardinality Cognizent6
explain project, package ,model , modelers.........and differences b/w them? HCL3
what is symmetric key?where do u use this?  1
---------------What is meant by Scheduling? IBM2
my cient has reports in java and the dw mart is there already, whether you will suggest for Cognos reports ? IBM1
can anybody tell me when do use 'running total'...give an example for the usage of running total  1
actually we are migrating one project to ACTUATE business intelligence solution to COGNOS REPORTNEt? why the client want to migrate from ACTUATE to COGNOS REPORTNEt? what are the special features in COGNOS REPORTNEt?  1
What is the difference btw reportnet - Report studio and cognos 8 - Report studio Dominion3
1.how do nyou configure link between fwm and database (source).if you created fwm where it will be? and if you create reports where it is stored? 2.what is spic shot in fwm? CTS1
How do you deployment reports from one server (Development) to other server(Production)? How do you configure the cognos7.0 version cube in cognos 8.0? Pls, explain with example? How do you create IQD without IMR or can u explain other way create IQD? TCS2
What is metric studio?what is score cards and how to implement score cards what is the use of score card? IBM1
------Diff B/W DrillThrough and master and Detailed Report? IBM2
How can you create prompts in framework manager? Tech-Mahindra3
what is meaning by Master detailed relationship ? please explain one example  2
what are the limitations of cognos reportnet? Nestle11
What are the differences between Cognos 8 and Cognos 7.x version?  1
does query is created for date prompt?  3
15. If I select the current month and year how can we display previous 11 months data? TCS1
 
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