CS614-Midterm
1 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
2 / 50
For a smooth DWH implementation we must be a technologist.
3 / 50
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.
4 / 50
De-Normalization normally speeds up
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: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
6 / 50
The goal of star schema design is to simplify ________
7 / 50
If every key in the data file is represented in the index file then index is :
8 / 50
The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
9 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
10 / 50
The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
11 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
12 / 50
If w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________
13 / 50
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 ____________.
14 / 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.
15 / 50
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...
16 / 50
DSS queries do not involve a primary key
17 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
18 / 50
Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
19 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
20 / 50
_______ is an application of information and data.
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_________ breaks a table into multiple tables based upon common column values.
22 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
23 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
24 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
25 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
26 / 50
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.
27 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
28 / 50
The _________ is only a small part in realizing the true business value buried within the mountain of data collected and stored within organizations business systems and operational databases.
29 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
30 / 50
To identify the __________________ required we need to perform data profiling
31 / 50
NUMA stands for __________
32 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
33 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
34 / 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.
35 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
36 / 50
_____modeling technique is more appropriate for data warehouses.
37 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
38 / 50
Slice and Dice is changing the view of the data.
39 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
40 / 50
41 / 50
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.
42 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
43 / 50
Transactional fact tables do not have records for events that do not occur. These are called
44 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
45 / 50
5 million bales.
46 / 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:
47 / 50
48 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
49 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
50 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
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