CS614-Midterm
1 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
2 / 50
The goal of ______is to look at as few block as possible to find the matching records.
3 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
4 / 50
Companies collect and record their own operational data, but at the same time they also use reference data obtained from _______ sources such as codes, prices etc.
5 / 50
Change Data Capture is one of the challenging technical issues in _____________
6 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
7 / 50
Data mining is a/an __________ approach, where browsing through data using data mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
8 / 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 ___________
9 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
10 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
11 / 50
It is observed that every year the amount of data recorded in an organization :
12 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
13 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
14 / 50
Ad-hoc access means to run such queries which are known already.
15 / 50
For a DWH project, the key requirement are ________ and product experience.
16 / 50
Data mining is a/an ______ approach , where browsing through data using mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
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
In DWH project, it is assured that ___________ environment is similar to the production environment
19 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
20 / 50
Collapsing tables can be done on the ___________ relationships
21 / 50
_____modeling technique is more appropriate for data warehouses.
22 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
23 / 50
Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
24 / 50
For a smooth DWH implementation we must be a technologist.
25 / 50
It is observed that every year the amount of data recorded in anorganization is
26 / 50
Slice and Dice is changing the view of the data.
27 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
28 / 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?
29 / 50
NUMA stands for __________
30 / 50
DSS queries do not involve a primary key
31 / 50
The need to synchronize data upon update is called
32 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
33 / 50
If „M‟ rows from table-A match the conditions in the query then table-B is accessed „M‟ times. Suppose table-B has an index on the join column. If „a‟ I/Os are required to read the data block for each scan and „b‟ I/Os for each data block then the total cost of accessing table-B is _____________ logical I/Os approximately.
34 / 50
35 / 50
The goal of star schema design is to simplify ________
36 / 50
Normalization effects performance
37 / 50
Focusing on data warehouse delivery only often end up _________.
38 / 50
For a given data set, to get a global view in un-supervised learning we use
39 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
40 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
41 / 50
In _________ system, the contents change with time. :
42 / 50
Grain is the ________ level of data stored in the warehouse.
43 / 50
We must try to find the one access tool that will handle all the needs of their users.
44 / 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.
45 / 50
De-Normalization normally speeds up
46 / 50
5 million bales.
47 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
48 / 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.
49 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
50 / 50
Pakistan is one of the five major ________ countries in the world.
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