CS614-Midterm
1 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
2 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
3 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
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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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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 ___________
6 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
7 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
8 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
9 / 50
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?
10 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
11 / 50
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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13 / 50
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.
14 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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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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The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
17 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
18 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
19 / 50
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.
20 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
21 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
22 / 50
For a relation to be in 4NF it must be:-
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For a DWH project, the key requirement are ________ and product experience.
24 / 50
Pre-computed _______ can solve performance problems
25 / 50
The goal of star schema design is to simplify ________
26 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
27 / 50
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
28 / 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.
29 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
30 / 50
Collapsing tables can be done on the ___________ relationships
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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.
32 / 50
Slice and Dice is changing the view of the data.
33 / 50
.______ is class of Decision Support Environment.
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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?
35 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
36 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
37 / 50
A data warehouse implementation without an OLAP tool is always possible.
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It is observed that every year the amount of data recorded in an organization :
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It is observed that every year the amount of data recorded in anorganization is
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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.
41 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
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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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44 / 50
In _________ system, the contents change with time. :
45 / 50
Grain is the ________ level of data stored in the warehouse.
46 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
47 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
48 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
49 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
50 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
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