CS614-Midterm
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The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
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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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Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
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NUMA stands for __________
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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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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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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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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.
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Slice and Dice is changing the view of the data.
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30.Data Warehouse is about taking / colleting data from different ________ sources:
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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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If every key in the data file is represented in the index file then index is :
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A data warehouse implementation without an OLAP tool is always possible.
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To identify the __________________ required we need to perform data profiling
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Non uniform distribution, when the data is distributed across the processors, is called ______.
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Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.
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_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
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: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
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For a DWH project, the key requirement are ________ and product experience.
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Ad-hoc access means to run such queries which are known already.
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Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
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There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
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Horizontal splitting breaks a table into multiple tables based upon_______
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De-Normalization normally speeds up
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For a relation to be in 4NF it must be:-
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The need to synchronize data upon update is called
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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
28 / 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?
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During the application specification activity, we also must give consideration to the organization of the applications.
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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___________
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Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
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In _________ system, the contents change with time. :
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The purpose of the House of Quality technique is to reduce ______ types of risk.
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_________ breaks a table into multiple tables based upon common column values.
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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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The goal of star schema design is to simplify ________
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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DTS allows us to connect through any data source or destination that is supported by ____________
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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.
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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.
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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.
43 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
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In horizontal splitting, we split a relation into multiple tables on the basis of
45 / 50
Pre-join technique is used to avoid
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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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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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Which statement is true for De-Normalization?
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It is observed that every year the amount of data recorded in anorganization is
50 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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