CS614-Midterm
1 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
2 / 50
The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
3 / 50
_____modeling technique is more appropriate for data warehouses.
4 / 50
DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.
5 / 50
It is observed that every year the amount of data recorded in an organization :
6 / 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?
7 / 50
_______ is an application of information and data.
8 / 50
For a smooth DWH implementation we must be a technologist.
9 / 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.
10 / 50
Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.
11 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
12 / 50
Data warehousing and on-line analytical processing (OLAP) are _______ elements of decision support system.
13 / 50
For a given data set, to get a global view in un-supervised learning we use
14 / 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 ___________
15 / 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.
16 / 50
The users of data warehouse are knowledge workers in other words they are _______in the organization.
17 / 50
Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.
18 / 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:
19 / 50
The growth of master files and magnetic tapes exploded around the mid- _______. :
20 / 50
For a DWH project, the key requirement are ________ and product experience.
21 / 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?
22 / 50
NUMA stands for __________
23 / 50
Analytical processing uses ____________ , instead of record level access.
24 / 50
Grain is the ________ level of data stored in the warehouse.
25 / 50
Pre-join technique is used to avoid
26 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
27 / 50
28 / 50
In DWH project, it is assured that ___________ environment is similar to the production environment
29 / 50
____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
30 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
31 / 50
DSS queries do not involve a primary key
32 / 50
If „M‟ rows from table-A match the conditions in the query then table-B is accessed „M‟ times. Suppose table-B has an index on the join column. If „a‟ I/Os are required to read the data block for each scan and „b‟ I/Os for each data block then the total cost of accessing table-B is _____________ logical I/Os approximately.
33 / 50
34 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
35 / 50
Pakistan is one of the five major ________ countries in the world.
36 / 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.
37 / 50
The goal of star schema design is to simplify ________
38 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
39 / 50
The need to synchronize data upon update is called
40 / 50
A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.
41 / 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 ____________.
42 / 50
To identify the __________________ required we need to perform data profiling
43 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
44 / 50
45 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
46 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
47 / 50
Transactional fact tables do not have records for events that do not occur. These are called
48 / 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.
49 / 50
DTS allows us to connect through any data source or destination that is supported by ____________
50 / 50
.______ is class of Decision Support Environment.
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