CS614-Midterm
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.______ is class of Decision Support Environment.
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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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________ gives total view of an organization
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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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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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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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Focusing on data warehouse delivery only often end up _________.
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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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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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Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
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Pakistan is one of the five major ________ countries in the world.
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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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_______ is an application of information and data.
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Pre-computed _______ can solve performance problems
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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 ____________.
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To judge effectiveness we perform data profiling twice.
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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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If „M‟ rows from table-A match the conditions in the query then table-B is accessed „M‟ times. Suppose table-B has an index on the join column. If „a‟ I/Os are required to read the data block for each scan and „b‟ I/Os for each data block then the total cost of accessing table-B is _____________ logical I/Os approximately.
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In horizontal splitting, we split a relation into multiple tables on the basis of
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Horizontal splitting breaks a table into multiple tables based upon_______
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The need to synchronize data upon update is called
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We must try to find the one access tool that will handle all the needs of their users.
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_________ breaks a table into multiple tables based upon common column values.
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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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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
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If every key in the data file is represented in the index file then index is :
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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 mining is a/an __________ approach, where browsing through data using data mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
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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 growth of master files and magnetic tapes exploded around the mid- _______. :
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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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Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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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?
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in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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As apposed to the out come of classification, estimation deal with ____________ valued outcome.
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Collapsing tables can be done on the ___________ relationships
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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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B-Tree is used as an index to provide access to records
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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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Grain is the ________ level of data stored in the warehouse.
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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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NUMA stands for __________
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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 data warehouse implementation without an OLAP tool is always possible.
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