CS614-Midterm
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Analytical processing uses ____________ , instead of record level access.
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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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The goal of star schema design is to simplify ________
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Pakistan is one of the five major ________ countries in the world.
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For a smooth DWH implementation we must be a technologist.
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_________ breaks a table into multiple tables based upon common column values.
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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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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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in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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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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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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There are many variants of the traditional nested-loop join. If the index is built as part of the query plan and subsequently dropped, it is called
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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 need to synchronize data upon update is called
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________ gives total view of an organization
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Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
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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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Pre-join technique is used to avoid
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Grain is the ________ level of data stored in the warehouse.
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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 divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
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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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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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Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
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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 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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_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
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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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We must try to find the one access tool that will handle all the needs of their users.
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________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
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Ad-hoc access means to run such queries which are known already.
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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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NUMA stands for __________
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In _________ system, the contents change with time. :
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DTS allows us to connect through any data source or destination that is supported by ____________
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For a DWH project, the key requirement are ________ and product experience.
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Normalization effects performance
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.______ is class of Decision Support Environment.
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Change Data Capture is one of the challenging technical issues in _____________
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In DWH project, it is assured that ___________ environment is similar to the production environment
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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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