CS614-Midterm
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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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Focusing on data warehouse delivery only often end up _________.
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The goal of star schema design is to simplify ________
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In horizontal splitting, we split a relation into multiple tables on the basis of
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In a traditional MIS system, there is an almost linear sequence of queries.
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To identify the __________________ required we need to perform data profiling
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For a given data set, to get a global view in un-supervised learning we use
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For a relation to be in 4NF it must be:-
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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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It is observed that every year the amount of data recorded in anorganization is
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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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5 million bales.
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The growth of master files and magnetic tapes exploded around the mid- _______. :
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A data warehouse implementation without an OLAP tool is always possible.
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_____modeling technique is more appropriate for data warehouses.
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_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
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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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Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
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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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The goal of ______is to look at as few block as possible to find the matching records.
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Pre-join technique is used to avoid
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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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With data mining, the best way to accomplish this is by setting aside some of your data in a vault to isolate it from the mining process; once the mining is complete, the results can be tested against the isolated data to confirm the model's _______.
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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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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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Pre-computed _______ can solve performance problems
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De-Normalization normally speeds up
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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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For a DWH project, the key requirement are ________ and product experience.
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For good decision making, data should be integrated across the organization to cross the LoB (Line of Business). This is to give the total view of organization from:
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Pakistan is one of the five major ________ countries in the world.
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A ________ dimension is a collection of random transactional codes, flags and/text attributes that are unrelated to any particular dimension. The ______ dimension is simply a structure that provides a convenient place to store the ______ attributes.
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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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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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DSS queries do not involve a primary key
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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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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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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.
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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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People that design and build the data warehouse must be capable of working across the organization at all levels
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During the application specification activity, we also must give consideration to the organization of the applications.
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The purpose of the House of Quality technique is to reduce ______ types of risk.
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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___________
50 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
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