CS614-Midterm
1 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
2 / 50
Pre-join technique is used to avoid
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Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
4 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
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People that design and build the data warehouse must be capable of working across the organization at all levels
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Horizontal splitting breaks a table into multiple tables based upon_______
7 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
8 / 50
A data warehouse implementation without an OLAP tool is always possible.
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The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
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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 ____________.
11 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
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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.
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The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
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15 / 50
DSS queries do not involve a primary key
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The goal of star schema design is to simplify ________
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.______ is class of Decision Support Environment.
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A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
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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.
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To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
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Pakistan is one of the five major ________ countries in the world.
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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 ___________
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De-Normalization normally speeds up
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The _________ is only a small part in realizing the true business value buried within the mountain of data collected and stored within organizations business systems and operational databases.
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The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
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All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
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Which statement is true for De-Normalization?
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_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
29 / 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
30 / 50
30.Data Warehouse is about taking / colleting data from different ________ sources:
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The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
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DTS allows us to connect through any data source or destination that is supported by ____________
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The need to synchronize data upon update is called
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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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NUMA stands for __________
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In _________ system, the contents change with time. :
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_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
40 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
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Focusing on data warehouse delivery only often end up _________.
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Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
43 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
44 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
45 / 50
Transactional fact tables do not have records for events that do not occur. These are called
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To judge effectiveness we perform data profiling twice.
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Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
48 / 50
5 million bales.
49 / 50
Analytical processing uses ____________ , instead of record level access.
50 / 50
For a DWH project, the key requirement are ________ and product experience.
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