CS614-Midterm
1 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
2 / 50
Collapsing tables can be done on the ___________ relationships
3 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
4 / 50
De-Normalization normally speeds up
5 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
6 / 50
If every key in the data file is represented in the index file then index is :
7 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
8 / 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:
9 / 50
We must try to find the one access tool that will handle all the needs of their users.
10 / 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.
11 / 50
For a given data set, to get a global view in un-supervised learning we use
12 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
13 / 50
Ad-hoc access means to run such queries which are known already.
14 / 50
To judge effectiveness we perform data profiling twice.
15 / 50
Transactional fact tables do not have records for events that do not occur. These are called
16 / 50
Data mining is a/an ______ approach , where browsing through data using mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
17 / 50
.______ is class of Decision Support Environment.
18 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
19 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
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
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
22 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
23 / 50
________ gives total view of an organization
24 / 50
_________ breaks a table into multiple tables based upon common column values.
25 / 50
Analytical processing uses ____________ , instead of record level access.
26 / 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.
27 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
28 / 50
Slice and Dice is changing the view of the data.
29 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
30 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
31 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
32 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
33 / 50
34 / 50
For a DWH project, the key requirement are ________ and product experience.
35 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
36 / 50
For a relation to be in 4NF it must be:-
37 / 50
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.
38 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
39 / 50
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 ___________
40 / 50
41 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
42 / 50
DSS queries do not involve a primary key
43 / 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.
44 / 50
Grain is the ________ level of data stored in the warehouse.
45 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
46 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
47 / 50
48 / 50
The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
49 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
50 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
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