CS614-Midterm
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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 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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It is observed that every year the amount of data recorded in an organization :
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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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5 million bales.
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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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For a relation to be in 4NF it must 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 ____________.
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NUMA stands for __________
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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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.______ is class of Decision Support Environment.
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The growth of master files and magnetic tapes exploded around the mid- _______. :
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Horizontal splitting breaks a table into multiple tables based upon_______
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To judge effectiveness we perform data profiling twice.
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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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The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
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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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If every key in the data file is represented in the index file then index is :
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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.
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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.
21 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
22 / 50
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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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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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
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________ gives total view of an organization
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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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Slice and Dice is changing the view of the data.
30 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
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Focusing on data warehouse delivery only often end up _________.
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The need to synchronize data upon update is called
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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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For a DWH project, the key requirement are ________ and product experience.
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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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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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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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Grain is the ________ level of data stored in the warehouse.
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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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Pakistan is one of the five major ________ countries in the world.
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De-Normalization normally speeds up
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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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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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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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Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
49 / 50
Pre-join technique is used to avoid
50 / 50
Transactional fact tables do not have records for events that do not occur. These are called
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