CS614-Midterm
1 / 50
NUMA stands for __________
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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.
3 / 50
To identify the __________________ required we need to perform data profiling
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Focusing on data warehouse delivery only often end up _________.
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During the application specification activity, we also must give consideration to the organization of the applications.
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For a DWH project, the key requirement are ________ and product experience.
7 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
8 / 50
A data warehouse implementation without an OLAP tool is always possible.
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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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The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
11 / 50
For a given data set, to get a global view in un-supervised learning we use
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Rearranging the grouping of source data, delivering it to the destination database, and ensuring the quality of data are crucial to the process of loading the data warehouse. Data ____________ is vitally important to the overall health of a warehouse project. 1. Cleansing 2. Cleaning 3. Scrubbing Which of the following options is true?
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Pre-join technique is used to avoid
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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 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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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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We must try to find the one access tool that will handle all the needs of their users.
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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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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.
20 / 50
For a smooth DWH implementation we must be a technologist.
21 / 50
Pre-computed _______ can solve performance problems
22 / 50
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.
23 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
24 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
25 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
26 / 50
________ gives total view of an organization
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DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
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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……
30 / 50
Slice and Dice is changing the view of the data.
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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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DTS allows us to connect through any data source or destination that is supported by ____________
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_________ breaks a table into multiple tables based upon common column values.
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In a traditional MIS system, there is an almost linear sequence of queries.
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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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37 / 50
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:
38 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
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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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in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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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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The growth of master files and magnetic tapes exploded around the mid- _______. :
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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 STAR schema used for data design is a __________ consisting of fact and dimension tables. :
47 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
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Analytical processing uses ____________ , instead of record level access.
49 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
50 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
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