CS614-Midterm
1 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
2 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
3 / 50
Change Data Capture is one of the challenging technical issues in _____________
4 / 50
Focusing on data warehouse delivery only often end up _________.
5 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
6 / 50
Pre-computed _______ can solve performance problems
7 / 50
________ gives total view of an organization
8 / 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.
9 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
10 / 50
11 / 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.
12 / 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.
13 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
14 / 50
To judge effectiveness we perform data profiling twice.
15 / 50
_________ breaks a table into multiple tables based upon common column values.
16 / 50
Which statement is true for De-Normalization?
17 / 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.
18 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
19 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
20 / 50
Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.
21 / 50
NUMA stands for __________
22 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
23 / 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:
24 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
25 / 50
_______ is an application of information and data.
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
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
28 / 50
De-Normalization normally speeds up
29 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
30 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
31 / 50
With data mining, the best way to accomplish this is by setting aside some of your data in a vault to isolate it from the mining process; once the mining is complete, the results can be tested against the isolated data to confirm the model's _______.
32 / 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
33 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
34 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
35 / 50
The goal of star schema design is to simplify ________
36 / 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.
37 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
38 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
39 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
40 / 50
41 / 50
5 million bales.
42 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
43 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
44 / 50
For a relation to be in 4NF it must be:-
45 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
46 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
47 / 50
_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
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
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.
50 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
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