CS614-Midterm
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Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
2 / 50
_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
3 / 50
_______ is an application of information and data.
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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
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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.
7 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
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For a DWH project, the key requirement are ________ and product experience.
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30.Data Warehouse is about taking / colleting data from different ________ sources:
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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...
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If w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________
12 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
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Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
14 / 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.
15 / 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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Focusing on data warehouse delivery only often end up _________.
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B-Tree is used as an index to provide access to records
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Data mining evolve as a mechanism to cater the limitations of ________ systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc.
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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.
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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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Pre-computed _______ can solve performance problems
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____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
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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.
27 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
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The goal of star schema design is to simplify ________
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Non uniform distribution, when the data is distributed across the processors, is called ______.
30 / 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.
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_________ breaks a table into multiple tables based upon common column values.
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The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
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Transactional fact tables do not have records for events that do not occur. These are called
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Horizontal splitting breaks a table into multiple tables based upon_______
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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In DWH project, it is assured that ___________ environment is similar to the production environment
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NUMA stands for __________
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To judge effectiveness we perform data profiling twice.
40 / 50
For a given data set, to get a global view in un-supervised learning we use
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If every key in the data file is represented in the index file then index is :
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Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
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Collapsing tables can be done on the ___________ relationships
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It is observed that every year the amount of data recorded in an organization :
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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?
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DSS queries do not involve a primary key
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________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
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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?
50 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
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