CS614-Midterm
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Pre-join technique is used to avoid
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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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DTS allows us to connect through any data source or destination that is supported by ____________
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________ gives total view of an organization
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________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
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DSS queries do not involve a primary key
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The need to synchronize data upon update is called
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Pre-computed _______ can solve performance problems
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Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
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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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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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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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Change Data Capture is one of the challenging technical issues in _____________
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Analytical processing uses ____________ , instead of record level access.
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If every key in the data file is represented in the index file then index is :
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Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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The goal of star schema design is to simplify ________
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As apposed to the out come of classification, estimation deal with ____________ valued outcome.
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Transactional fact tables do not have records for events that do not occur. These are called
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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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For a DWH project, the key requirement are ________ and product experience.
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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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B-Tree is used as an index to provide access to records
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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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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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Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
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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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For a given data set, to get a global view in un-supervised learning we use
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NUMA stands for __________
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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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_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
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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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In DWH project, it is assured that ___________ environment is similar to the production environment
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Slice and Dice is changing the view of the data.
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_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
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The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
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Non uniform distribution, when the data is distributed across the processors, is called ______.
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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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: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
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.______ is class of Decision Support Environment.
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Collapsing tables can be done on the ___________ relationships
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The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
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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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In horizontal splitting, we split a relation into multiple tables on the basis of
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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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49 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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