CS614-Midterm
1 / 50
The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
2 / 50
Change Data Capture is one of the challenging technical issues in _____________
3 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
4 / 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.
5 / 50
Rearranging the grouping of source data, delivering it to the destination database, and ensuring the quality of data are crucial to the process of loading the data warehouse. Data ____________ is vitally important to the overall health of a warehouse project. 1. Cleansing 2. Cleaning 3. Scrubbing Which of the following options is true?
6 / 50
Pre-computed _______ can solve performance problems
7 / 50
The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The __________ the portion of the program that must be executed sequentially, the greater the scalability of computation.
8 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
9 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
10 / 50
Which statement is true for De-Normalization?
11 / 50
Analytical processing uses ____________ , instead of record level access.
12 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
13 / 50
In _________ system, the contents change with time. :
14 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
15 / 50
It is observed that every year the amount of data recorded in anorganization is
16 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
17 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
18 / 50
_________ breaks a table into multiple tables based upon common column values.
19 / 50
Collapsing tables can be done on the ___________ relationships
20 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
21 / 50
Pakistan is one of the five major ________ countries in the world.
22 / 50
For a DWH project, the key requirement are ________ and product experience.
23 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
24 / 50
DSS queries do not involve a primary key
25 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
26 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
27 / 50
If every key in the data file is represented in the index file then index is :
28 / 50
It is observed that every year the amount of data recorded in an organization :
29 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
30 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
31 / 50
NUMA stands for __________
32 / 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.
33 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
34 / 50
35 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
36 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
37 / 50
38 / 50
All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
39 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
40 / 50
Focusing on data warehouse delivery only often end up _________.
41 / 50
Data mining evolve as mechanism to cater the limitations of _____ systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc...
42 / 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?
43 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
44 / 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 ___________
45 / 50
_____modeling technique is more appropriate for data warehouses.
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47 / 50
The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The smaller the portion of the program that must be executed __________, the greater the scalability of the computation.
48 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
49 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
50 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
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