CS614-Midterm
1 / 50
NUMA stands for __________
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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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Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
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____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
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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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Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
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30.Data Warehouse is about taking / colleting data from different ________ sources:
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Slice and Dice is changing the view of the data.
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Transactional fact tables do not have records for events that do not occur. These are called
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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 divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
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.______ is class of Decision Support Environment.
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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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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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Data mining derives its name from the similarities between searching for valuable business information in a large database, for example, finding linked products in gigabytes of store scanner data, and mining a mountain for a _________ of valuable ore.
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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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For a relation to be in 4NF it must be:-
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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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We must try to find the one access tool that will handle all the needs of their users.
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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
23 / 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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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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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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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 ____________.
27 / 50
Pakistan is one of the five major ________ countries in the world.
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Focusing on data warehouse delivery only often end up _________.
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The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
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The purpose of the House of Quality technique is to reduce ______ types of risk.
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in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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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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The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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In horizontal splitting, we split a relation into multiple tables on the basis of
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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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De-Normalization normally speeds up
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Normalization effects performance
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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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The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
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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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To judge effectiveness we perform data profiling twice.
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Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
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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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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.
48 / 50
The need to synchronize data upon update is called
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Pre-join technique is used to avoid
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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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