CS614-Midterm
1 / 50
Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
2 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
3 / 50
B-Tree is used as an index to provide access to records
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The purpose of the House of Quality technique is to reduce ______ types of risk.
5 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
6 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
7 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
8 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
9 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
10 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
11 / 50
Data mining derives its name from the similarities between searching for valuable business information in a large database, for example, finding linked products in gigabytes of store scanner data, and mining a mountain for a _________ of valuable ore.
12 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
13 / 50
_________ breaks a table into multiple tables based upon common column values.
14 / 50
For a given data set, to get a global view in un-supervised learning we use
15 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
16 / 50
Which statement is true for De-Normalization?
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As apposed to the out come of classification, estimation deal with ____________ valued outcome.
18 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
19 / 50
5 million bales.
20 / 50
Pre-join technique is used to avoid
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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.
22 / 50
The goal of ______is to look at as few block as possible to find the matching records.
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: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
24 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
25 / 50
Transactional fact tables do not have records for events that do not occur. These are called
26 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
27 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
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
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.
30 / 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.
31 / 50
Slice and Dice is changing the view of the data.
32 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
33 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
34 / 50
Focusing on data warehouse delivery only often end up _________.
35 / 50
36 / 50
It is observed that every year the amount of data recorded in anorganization is
37 / 50
NUMA stands for __________
38 / 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 ____________.
39 / 50
For a DWH project, the key requirement are ________ and product experience.
40 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
41 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
42 / 50
Pakistan is one of the five major ________ countries in the world.
43 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
44 / 50
De-Normalization normally speeds up
45 / 50
Change Data Capture is one of the challenging technical issues in _____________
46 / 50
For a smooth DWH implementation we must be a technologist.
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 __________ the portion of the program that must be executed sequentially, the greater the scalability of computation.
48 / 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.
49 / 50
There are many variants of the traditional nested-loop join. If the index is built as part of the query plan and subsequently dropped, it is called
50 / 50
The need to synchronize data upon update is called
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