CS614-Midterm
1 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
2 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
3 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
4 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
5 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
6 / 50
A ________ dimension is a collection of random transactional codes, flags and/text attributes that are unrelated to any particular dimension. The ______ dimension is simply a structure that provides a convenient place to store the ______ attributes.
7 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
8 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
9 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
10 / 50
To identify the __________________ required we need to perform data profiling
11 / 50
Pre-join technique is used to avoid
12 / 50
The goal of star schema design is to simplify ________
13 / 50
If someone told you that he had a good model to predict customer usage, the first thing you might try would be to ask him to apply his model to your customer _______, where you already knew the answer.
14 / 50
5 million bales.
15 / 50
A data warehouse implementation without an OLAP tool is always possible.
16 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
17 / 50
NUMA stands for __________
18 / 50
Collapsing tables can be done on the ___________ relationships
19 / 50
Data Transformation Services (DTS) provide a set of _____ that lets you extract, transform, and consolidate data from disparate sources into single or multiple destinations supported by DTS connectivity.
20 / 50
Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
21 / 50
Pre-computed _______ can solve performance problems
22 / 50
_______ is an application of information and data.
23 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
24 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
25 / 50
De-Normalization normally speeds up
26 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
27 / 50
28 / 50
Analytical processing uses ____________ , instead of record level access.
29 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
30 / 50
________ gives total view of an organization
31 / 50
The technique that is used to perform these feats in data mining modeling, and this act of model building is something that people have been doing for long time, certainly before the _______ of computers or data mining technology.
32 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
33 / 50
For good decision making, data should be integrated across the organization to cross the LoB (Line of Business). This is to give the total view of organization from:
34 / 50
When performing objective assessments, companies follow a set of principles to develop metrics specific to their needs, there is hard to have “one size fits all” approach. Which of the following statement represents the pervasive functional forms?
35 / 50
Normalization effects performance
36 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
37 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
38 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
39 / 50
For a given data set, to get a global view in un-supervised learning we use
40 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
41 / 50
Execution can be completed successfully or it may be stopped due to some error. In case of successful completion of execution all the transactions will be ___________
42 / 50
43 / 50
30.Data Warehouse is about taking / colleting data from different ________ sources:
44 / 50
All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
45 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
46 / 50
Slice and Dice is changing the view of the data.
47 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
48 / 50
49 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
50 / 50
Transactional fact tables do not have records for events that do not occur. These are called
Your score is
The average score is 0%
Restart quiz
