CS614-Midterm
1 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
2 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
3 / 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.
4 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
5 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
6 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
7 / 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 ____________.
8 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
9 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
10 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
11 / 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.
12 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
13 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
14 / 50
In _________ system, the contents change with time. :
15 / 50
For a smooth DWH implementation we must be a technologist.
16 / 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:
17 / 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.
18 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
19 / 50
Ad-hoc access means to run such queries which are known already.
20 / 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
21 / 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___________
22 / 50
Pakistan is one of the five major ________ countries in the world.
23 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
24 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
25 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
26 / 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 ___________
27 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
28 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
29 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
30 / 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 _______.
31 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
32 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
33 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
34 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
35 / 50
Slice and Dice is changing the view of the data.
36 / 50
The goal of ______is to look at as few block as possible to find the matching records.
37 / 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.
38 / 50
NUMA stands for __________
39 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
40 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
41 / 50
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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 smaller the portion of the program that must be executed __________, the greater the scalability of the computation.
44 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
45 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
46 / 50
_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.
47 / 50
48 / 50
Pre-join technique is used to avoid
49 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
50 / 50
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