CS614-Midterm
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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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To identify the __________________ required we need to perform data profiling
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For a smooth DWH implementation we must be a technologist.
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A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
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30.Data Warehouse is about taking / colleting data from different ________ sources:
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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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_____________ 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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_________ breaks a table into multiple tables based upon common column values.
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NUMA stands for __________
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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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Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
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It is observed that every year the amount of data recorded in anorganization is
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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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Ad-hoc access means to run such queries which are known already.
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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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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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De-Normalization normally speeds up
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The goal of star schema design is to simplify ________
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_____modeling technique is more appropriate for data warehouses.
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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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Data mining evolve as 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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Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
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For a DWH project, the key requirement are ________ and product experience.
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Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
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Pre-computed _______ can solve performance problems
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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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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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Pakistan is one of the five major ________ countries in the world.
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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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We must try to find the one access tool that will handle all the needs of their users.
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The need to synchronize data upon update is called
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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 purpose of the House of Quality technique is to reduce ______ types of risk.
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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 agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
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If every key in the data file is represented in the index file then index is :
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The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
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The users of data warehouse are knowledge workers in other words they are _______in the organization.
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Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
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During the application specification activity, we also must give consideration to the organization of the applications.
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Focusing on data warehouse delivery only often end up _________.
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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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People that design and build the data warehouse must be capable of working across the organization at all levels
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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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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?
50 / 50
DSS queries do not involve a primary key
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