Need BW certification details

Question

Hi All,
I dont know about the BW certification paper model and no idea,
Is any one please give me the useful information about the certification, I am very gr8ful if you send the model paper...
Thanks,
Sidhartha

Answer 1

hi sidharth,
I have few questions regarding Certification from the topic Data Modelling.
1) Which of the following is an example of a slowly
changing dimension ?
a. Customer on a Sales Order
b. Date
c. Person responsible for a cost center
d. Value of a purchase order
e. None of the above
2) If you worked for a retail company that changed prices
on a very frequent basis how would you model the price
[can somebody explain me the ansers also ?]
a. In the master data table as an attribut
b. In the transaction table as a new characteristic
c. In the ODS to enhance performance
d. In the fact table
e. None of the above
3) Which of the following occurs as a result of
degenerating dimensions ?
a. The grain of the fact table represents actual working
documents like order number or invoice number
b. All descriptive attributes of the grain are located in
other dimensions
c. the infocube becomes very weak and performs poorly when
it is run
d. The degenerating dimensions cannot be modeled using
normal star schema
e. None of the above
4) Which of the following describes an unbalanced
hierarchy ?
a. A hierarchy with too many leaves within one branch
b. A hierarchy with fewer nodes within one or more
branches
c. Hierarchy without leaves
d. The term used for data that are delivered from two or
more sources on different aggregation levels
e. None of the above
5) Hierarchy Can be which of the following ?
a. Time - dependent name
b. Version dependent
c. With intervals
d. Time- dependent structure
e. Used by multiple infocube
f. None of the above.
> Answers in book are b,c,d (can someone explain what is with
> interval hierarchy ?)
6) Name the three differences between OLAP and OLTP
systems?
a. Software used
b. Current data versus history required
c. One to two months of data versus two to seven years of
data
d. Detailed transaction data versus summarized data
e. None of the above
7) Sometimes we have to combine unrelated characteristics
into one dimension, due to which of the following facts
a. We runout of dimensions and we have to include the data
in the same infocube
b. We are running out of space on the database
c. We are looking for higher performance
d. Lower number of dimensions is a way to optimize data
staging
e. To reduce the number of joins
f. All of the above
8) What are the limitations of Remote Cube?
a. Additional requirements for extractions
b. Slow
c. System dependent
d. Only for transaction data
e. Small volume