CS614-Midterm
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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 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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Normalization effects performance
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5 million bales.
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For a smooth DWH implementation we must be a technologist.
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Pakistan is one of the five major ________ countries in the world.
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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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Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
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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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All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
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B-Tree is used as an index to provide access to records
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The users of data warehouse are knowledge workers in other words they are _______in the organization.
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_________ breaks a table into multiple tables based upon common column values.
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Analytical processing uses ____________ , instead of record level access.
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_______ is an application of information and data.
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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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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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Pre-join technique is used to avoid
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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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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 „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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In _________ system, the contents change with time. :
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Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
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The purpose of the House of Quality technique is to reduce ______ types of risk.
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The goal of star schema design is to simplify ________
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.______ is class of Decision Support Environment.
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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 horizontal splitting, we split a relation into multiple tables on the basis of
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Data mining uses _________ algorithms to discover patterns and regularities in data.
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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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If every key in the data file is represented in the index file then index is :
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For a DWH project, the key requirement are ________ and product experience.
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To identify the __________________ required we need to perform data profiling
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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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DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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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 STAR schema used for data design is a __________ consisting of fact and dimension tables. :
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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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Slice and Dice is changing the view of the data.
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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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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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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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Pre-computed _______ can solve performance problems
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DTS allows us to connect through any data source or destination that is supported by ____________
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