CS614-Midterm
1 / 50
Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .
2 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
3 / 50
Pre-computed _______ can solve performance problems
4 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
5 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
6 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
7 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
8 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
9 / 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.
10 / 50
Slice and Dice is changing the view of the data.
11 / 50
For a DWH project, the key requirement are ________ and product experience.
12 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
13 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
14 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
15 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
16 / 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.
17 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
18 / 50
De-Normalization normally speeds up
19 / 50
Change Data Capture is one of the challenging technical issues in _____________
20 / 50
Data mining derives its name from the similarities between searching for valuable business information in a large database, for example, finding linked products in gigabytes of store scanner data, and mining a mountain for a _________ of valuable ore.
21 / 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.
22 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
23 / 50
The goal of star schema design is to simplify ________
24 / 50
B-Tree is used as an index to provide access to records
25 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
26 / 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___________
27 / 50
In a traditional MIS system, there is an almost linear sequence of queries.
28 / 50
29 / 50
To judge effectiveness we perform data profiling twice.
30 / 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.
31 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
32 / 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?
33 / 50
Grain is the ________ level of data stored in the warehouse.
34 / 50
35 / 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 ___________
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
_________ breaks a table into multiple tables based upon common column values.
38 / 50
Pakistan is one of the five major ________ countries in the world.
39 / 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.
40 / 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:
41 / 50
: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).
42 / 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.
43 / 50
Pre-join technique is used to avoid
44 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
45 / 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 ____________.
46 / 50
.______ is class of Decision Support Environment.
47 / 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?
48 / 50
Collapsing tables can be done on the ___________ relationships
49 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
50 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
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