CS614-Midterm
1 / 50
Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
2 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
3 / 50
Analytical processing uses ____________ , instead of record level access.
4 / 50
For a DWH project, the key requirement are ________ and product experience.
5 / 50
It is observed that every year the amount of data recorded in an organization :
6 / 50
Ad-hoc access means to run such queries which are known already.
7 / 50
A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.
8 / 50
The STAR schema used for data design is a __________ consisting of fact and dimension tables. :
9 / 50
There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……
10 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
11 / 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.
12 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
13 / 50
_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.
14 / 50
15 / 50
In horizontal splitting, we split a relation into multiple tables on the basis of
16 / 50
17 / 50
Change Data Capture is one of the challenging technical issues in _____________
18 / 50
The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.
19 / 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.
20 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
21 / 50
in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels
22 / 50
We must try to find the one access tool that will handle all the needs of their users.
23 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
24 / 50
Pre-join technique is used to avoid
25 / 50
Slice and Dice is changing the view of the data.
26 / 50
Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.
27 / 50
Pakistan is one of the five major ________ countries in the world.
28 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
29 / 50
Data mining evolve as mechanism to cater the limitations of _____ systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc...
30 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
31 / 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.
32 / 50
33 / 50
As apposed to the out come of classification, estimation deal with ____________ valued outcome.
34 / 50
_________ breaks a table into multiple tables based upon common column values.
35 / 50
Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.
36 / 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.
37 / 50
Which statement is true for De-Normalization?
38 / 50
Transactional fact tables do not have records for events that do not occur. These are called
39 / 50
_____modeling technique is more appropriate for data warehouses.
40 / 50
Normalization effects performance
41 / 50
5 million bales.
42 / 50
43 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
44 / 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.
45 / 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?
46 / 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 ____________.
47 / 50
A data warehouse implementation without an OLAP tool is always possible.
48 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
49 / 50
________ gives total view of an organization
50 / 50
If every key in the data file is represented in the index file then index is :
Your score is
The average score is 0%
Restart quiz
