CS614-Midterm
1 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
2 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
3 / 50
It is observed that every year the amount of data recorded in anorganization is
4 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
5 / 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.
6 / 50
All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
7 / 50
If someone told you that he had a good model to predict customer usage, the first thing you might try would be to ask him to apply his model to your customer _______, where you already knew the answer.
8 / 50
_______ is an application of information and data.
9 / 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.
10 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
11 / 50
De-Normalization normally speeds up
12 / 50
_________ breaks a table into multiple tables based upon common column values.
13 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
14 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
15 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
16 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
17 / 50
5 million bales.
18 / 50
19 / 50
B-Tree is used as an index to provide access to records
20 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
21 / 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 ____________.
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
If w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________
24 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
25 / 50
A data warehouse implementation without an OLAP tool is always possible.
26 / 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.
27 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
28 / 50
Pre-join technique is used to avoid
29 / 50
Ad-hoc access means to run such queries which are known already.
30 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
31 / 50
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.
32 / 50
The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The smaller the portion of the program that must be executed __________, the greater the scalability of the computation.
33 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
34 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
35 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
36 / 50
Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
37 / 50
38 / 50
Pakistan is one of the five major ________ countries in the world.
39 / 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
40 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
41 / 50
42 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
43 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
44 / 50
The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
45 / 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?
46 / 50
47 / 50
Pre-computed _______ can solve performance problems
48 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
49 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
50 / 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?
Your score is
The average score is 0%
Restart quiz
