CS614-Midterm
1 / 50
Pakistan is one of the five major ________ countries in the world.
2 / 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 ___________
3 / 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.
4 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
5 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
6 / 50
.______ is class of Decision Support Environment.
7 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
8 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
9 / 50
Pre-join technique is used to avoid
10 / 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.
11 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
12 / 50
Focusing on data warehouse delivery only often end up _________.
13 / 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.
14 / 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 _______.
15 / 50
_______ is an application of information and data.
16 / 50
If every key in the data file is represented in the index file then index is :
17 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
18 / 50
A data warehouse implementation without an OLAP tool is always possible.
19 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
20 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
21 / 50
22 / 50
Pre-computed _______ can solve performance problems
23 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
24 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
25 / 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?
26 / 50
Data mining is a/an ______ approach , where browsing through data using mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
27 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
28 / 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.
29 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
30 / 50
During ETL process of an organization, suppose you have data which can be transformed using any of the transformation method. Which of the following strategy will be your choice for least complexity?
31 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
32 / 50
For a given data set, to get a global view in un-supervised learning we use
33 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
34 / 50
_________ breaks a table into multiple tables based upon common column values.
35 / 50
Ad-hoc access means to run such queries which are known already.
36 / 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?
37 / 50
It is observed that every year the amount of data recorded in anorganization is
38 / 50
Grain is the ________ level of data stored in the warehouse.
39 / 50
De-Normalization normally speeds up
40 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
41 / 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.
42 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
43 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
44 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
45 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
46 / 50
The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.
47 / 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 ____________.
48 / 50
The need to synchronize data upon update is called
49 / 50
For a DWH project, the key requirement are ________ and product experience.
50 / 50
We must try to find the one access tool that will handle all the needs of their users.
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