CS614-Midterm
1 / 50
DSS queries do not involve a primary key
2 / 50
To judge effectiveness we perform data profiling twice.
3 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
4 / 50
NUMA stands for __________
5 / 50
_________ breaks a table into multiple tables based upon common column values.
6 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
7 / 50
Analytical processing uses ____________ , instead of record level access.
8 / 50
To identify the __________________ required we need to perform data profiling
9 / 50
De-Normalization normally speeds up
10 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
11 / 50
Pre-computed _______ can solve performance problems
12 / 50
13 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
14 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
15 / 50
.______ is class of Decision Support Environment.
16 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
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
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
19 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
20 / 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.
21 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
22 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
23 / 50
Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.
24 / 50
The goal of ______is to look at as few block as possible to find the matching records.
25 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
26 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
27 / 50
The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
28 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
29 / 50
Grain is the ________ level of data stored in the warehouse.
30 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
31 / 50
For a relation to be in 4NF it must be:-
32 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
33 / 50
Data mining uses _________ algorithms to discover patterns and regularities in data.
34 / 50
35 / 50
For a DWH project, the key requirement are ________ and product experience.
36 / 50
It is observed that every year the amount of data recorded in an organization :
37 / 50
Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.
38 / 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:
39 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
40 / 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.
41 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
42 / 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?
43 / 50
Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.
44 / 50
For a smooth DWH implementation we must be a technologist.
45 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
46 / 50
30.Data Warehouse is about taking / colleting data from different ________ sources:
47 / 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 _______.
48 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
49 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
50 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
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