CS614-Midterm
1 / 50
_______________, if fits into memory, costs only one disk I/O access to locate a record by given key.
2 / 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?
3 / 50
The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The __________ the portion of the program that must be executed sequentially, the greater the scalability of computation.
4 / 50
.______ is class of Decision Support Environment.
5 / 50
_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
6 / 50
: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
7 / 50
Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.
8 / 50
Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.
9 / 50
30.Data Warehouse is about taking / colleting data from different ________ sources:
10 / 50
Analytical processing uses ____________ , instead of record level access.
11 / 50
Horizontal splitting breaks a table into multiple tables based upon_______
12 / 50
To judge effectiveness we perform data profiling twice.
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
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.
15 / 50
It is observed that every year the amount of data recorded in an organization :
16 / 50
If every key in the data file is represented in the index file then index is :
17 / 50
People that design and build the data warehouse must be capable of working across the organization at all levels
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
NUMA stands for __________
20 / 50
_________ breaks a table into multiple tables based upon common column values.
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
In _________ system, the contents change with time. :
23 / 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.
24 / 50
Non uniform distribution, when the data is distributed across the processors, is called ______.
25 / 50
Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.
26 / 50
Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.
27 / 50
Slice and Dice is changing the view of the data.
28 / 50
To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
29 / 50
The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.
30 / 50
Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.
31 / 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.
32 / 50
The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.
33 / 50
B-Tree is used as an index to provide access to records
34 / 50
During the application specification activity, we also must give consideration to the organization of the applications.
35 / 50
The input to the data warehouse can come from OLTP or transactional system but not from other third party database.
36 / 50
Pre-computed _______ can solve performance problems
37 / 50
38 / 50
________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
39 / 50
40 / 50
_______ is an application of information and data.
41 / 50
The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.
42 / 50
The goal of ______is to look at as few block as possible to find the matching records.
43 / 50
44 / 50
For a smooth DWH implementation we must be a technologist.
45 / 50
The purpose of the House of Quality technique is to reduce ______ types of risk.
46 / 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.
47 / 50
_____modeling technique is more appropriate for data warehouses.
48 / 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.
49 / 50
The goal of star schema design is to simplify ________
50 / 50
_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
Your score is
The average score is 0%
Restart quiz
