CS614-Midterm
1 / 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.
2 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
3 / 50
Pre-computed _______ can solve performance problems
4 / 50
________ gives total view of an organization
5 / 50
Transactional fact tables do not have records for events that do not occur. These are called
6 / 50
30.Data Warehouse is about taking / colleting data from different ________ sources:
7 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
8 / 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.
9 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
10 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
11 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
12 / 50
Grain is the ________ level of data stored in the warehouse.
13 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
14 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
15 / 50
For a relation to be in 4NF it must be:-
16 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
17 / 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?
18 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
19 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
20 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
21 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
22 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
23 / 50
Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
24 / 50
It is observed that every year the amount of data recorded in an organization :
25 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
26 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
27 / 50
The goal of star schema design is to simplify ________
28 / 50
The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
29 / 50
During ETL process of an organization, suppose you have data which can be transformed using any of the transformation method. Which of the following strategy will be your choice for least complexity?
30 / 50
_________ breaks a table into multiple tables based upon common column values.
31 / 50
Which statement is true for De-Normalization?
32 / 50
If some error occurs, execution will be terminated abnormally and all transactions will be rolled back. In this case when we will access the database we will find it in the state that was before the ____________.
33 / 50
De-Normalization normally speeds up
34 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
35 / 50
NUMA stands for __________
36 / 50
The key idea behind ___________ is to take a big task and break it into subtasks that can be processed concurrently on a stream of data inputs in multiple, overlapping stages of execution.
37 / 50
Slice and Dice is changing the view of the data.
38 / 50
39 / 50
For a DWH project, the key requirement are ________ and product experience.
40 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
41 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
42 / 50
Collapsing tables can be done on the ___________ relationships
43 / 50
Focusing on data warehouse delivery only often end up _________.
44 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
45 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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47 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
48 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
49 / 50
In _________ system, the contents change with time. :
50 / 50
If w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________
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