CS614-Midterm
1 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
2 / 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.
3 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
4 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
5 / 50
Pre-computed _______ can solve performance problems
6 / 50
For a smooth DWH implementation we must be a technologist.
7 / 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.
8 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
9 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
10 / 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:
11 / 50
Ad-hoc access means to run such queries which are known already.
12 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
13 / 50
Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
14 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
15 / 50
Normalization effects performance
16 / 50
The goal of star schema design is to simplify ________
17 / 50
_______ is an application of information and data.
18 / 50
B-Tree is used as an index to provide access to records
19 / 50
Analytical processing uses ____________ , instead of record level access.
20 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
21 / 50
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?
22 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
23 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
24 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
25 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
26 / 50
5 million bales.
27 / 50
Pakistan is one of the five major ________ countries in the world.
28 / 50
________ gives total view of an organization
29 / 50
For a DWH project, the key requirement are ________ and product experience.
30 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
31 / 50
For a given data set, to get a global view in un-supervised learning we use
32 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
33 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
34 / 50
35 / 50
36 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
37 / 50
DSS queries do not involve a primary key
38 / 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.
39 / 50
_____modeling technique is more appropriate for data warehouses.
40 / 50
41 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
42 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
43 / 50
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?
44 / 50
To identify the __________________ required we need to perform data profiling
45 / 50
_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
46 / 50
_________ breaks a table into multiple tables based upon common column values.
47 / 50
All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
48 / 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 ___________
49 / 50
It is observed that every year the amount of data recorded in an organization :
50 / 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.
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