CS614-Midterm
1 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
2 / 50
Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
3 / 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.
4 / 50
A data warehouse implementation without an OLAP tool is always possible.
5 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
6 / 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
7 / 50
Pre-computed _______ can solve performance problems
8 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
9 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
10 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
11 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
12 / 50
We must try to find the one access tool that will handle all the needs of their users.
13 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
14 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
15 / 50
For a DWH project, the key requirement are ________ and product experience.
16 / 50
Analytical processing uses ____________ , instead of record level access.
17 / 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 ____________.
18 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
19 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
20 / 50
21 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
22 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
23 / 50
Slice and Dice is changing the view of the data.
24 / 50
NUMA stands for __________
25 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
26 / 50
Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.
27 / 50
It is observed that every year the amount of data recorded in an organization :
28 / 50
The goal of ______is to look at as few block as possible to find the matching records.
29 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
30 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
31 / 50
Pakistan is one of the five major ________ countries in the world.
32 / 50
33 / 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 ___________
34 / 50
Grain is the ________ level of data stored in the warehouse.
35 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
36 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
37 / 50
De-Normalization normally speeds up
38 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
39 / 50
Focusing on data warehouse delivery only often end up _________.
40 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
41 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
42 / 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 _______.
43 / 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.
44 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
45 / 50
All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?
46 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
47 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
48 / 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___________
49 / 50
50 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
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