CS614-Midterm
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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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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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Horizontal splitting breaks a table into multiple tables based upon_______
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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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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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B-Tree is used as an index to provide access to records
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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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Non uniform distribution, when the data is distributed across the processors, is called ______.
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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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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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For a DWH project, the key requirement are ________ and product experience.
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The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
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Which statement is true for De-Normalization?
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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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In a traditional MIS system, there is an almost linear sequence of queries.
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Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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To identify the __________________ required we need to perform data profiling
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De-Normalization normally speeds up
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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
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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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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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To judge effectiveness we perform data profiling twice.
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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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For a relation to be in 4NF it must be:-
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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 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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The need to synchronize data upon update is called
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Focusing on data warehouse delivery only often end up _________.
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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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.______ is class of Decision Support Environment.
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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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_________ breaks a table into multiple tables based upon common column values.
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_______ is an application of information and data.
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____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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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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_____modeling technique is more appropriate for data warehouses.
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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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Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
45 / 50
Slice and Dice is changing the view of the data.
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Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
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Transactional fact tables do not have records for events that do not occur. These are called
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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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A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
50 / 50
The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The __________ the portion of the program that must be executed sequentially, the greater the scalability of computation.
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