Deck 8: Big Data Data Warehouses and Business Intelligence Systems

Question 1

Data Mining uses sophisticated statistical and mathematical techniques to perform what-if analyses,to make predictions,and to facilitate decision making.

Answer 1

True

Question 2

Business Intelligence (BI)systems support operational activities.

Answer 2

False

Question 3

BI reporting systems summarize the current status of business activities and compare that status with past events but not with predicted future activities.

Answer 3

False

Question 4

Report delivery is more difficult for data mining than it is for reporting systems.

Question 5

Dimensional databases are used for analytical data processing.

Question 6

Operational databases store historical data.

Question 7

OLAP provides the ability to sum,count,average and perform other simple arithmetic operations on groups of data.

Question 8

Business Intelligence (BI)systems are information systems that help users analyze and use data.

Question 9

Data warehouses are populated with data prepared by Extract,Transform,and Load (ETL)systems.

Question 10

A data warehouse is a database system that has data and programs for,as well as personnel specialized in,BI processing.

Question 11

Operational databases contain a fact table.

Question 12

A star schema resembles a star,with a dimension table at the center and fact tables radiating out from the center.

Question 13

Big Data is the name given to the enormous datasets generated by Web 2.0 applications.

Question 14

Business Intelligence (BI)systems obtain data in three different ways.

Question 15

Business Intelligence (BI)reporting systems can analyze data using standard SQL.

Question 16

Business Intelligence (BI)reporting systems are used to filter data,sort data,group data and make simple calculations based on the data.

Question 17

Dimensional databases use the star schema.

Question 18

A data mart is a collection of data that addresses a particular component or functional area of a business.

Question 19

Problematic data include so-called "dirty data."

Question 20

In a snowflake table,each dimension table is normalized.

Question 21

Excel 2013 cannot import Access 2013 data directly into a PivotTable report,but must first place the data into a worksheet.

Question 22

We have obtained access to the company's operational data.In one record,we find that a customer's age has been recorded as "337." This is an example of:

A)dirty data.
B)inconsistent data.
C)non-integrated data.
D)a "wrong format" problem.
E)a "too much data" problem.

Question 23

Although Excel 2013 will create a PivotTable report using Access 2013 data,it does not have formatting tools that can be used with the report.

Question 24

Business Intelligence (BI)reporting systems can do which of the following operations?

A)Filter data
B)Group data
C)Modify data
D)Both A and B
E)All of the above

Question 25

The term drill down refers to the capability of seeing the data in smaller and smaller units.

Question 26

To create an OLAP report for an Access 2013 database,use the PivotTable tool in Access 2013.

Question 27

Business Intelligence (BI)systems do which of the following?

A)Analyze current and past activities
B)Predict future events
C)Record and process transactions
D)Both A and B
E)All of the above

Question 28

We have obtained access to the company's operational data.We examine 50 records for customers with phone numbers that should use the current area code of 345.Of these 50 records,we find 10 that still use an older area code of 567.This is an example of:

A)dirty data.
B)inconsistent data.
C)non-integrated data.
D)a "wrong format" problem.
E)a "too much data" problem.

Question 29

Business Intelligence (BI)systems fall into which of the following categories?

A)Processing
B)Reporting
C)Data mining
D)Both A and B
E)Both B and C

Question 30

Data mining applications are used to accomplish which of the following tasks?

A)Perform what-if analysis
B)Make predications
C)Facilitate decision making
D)Both A and B
E)All of the above

Question 31

In the MapReduce process,the Reduce step is followed by the Map step.

Question 32

Apache Cassandra is an example of a column family database.

Question 33

NoSQL really stands for "Not only SQL."

Question 34

Business Intelligence (BI)systems obtain their data by which of the following means?

A)Read and process data from an operational database
B)Process extracts from operational databases
C)Process data purchased from data vendors
D)Both A and B
E)All of the above

Question 35

A Business Intelligence (BI)reporting system that uses extensions to SQL is:

A)cluster analysis.
B)OLAP.
C)regression analysis.
D)RFM analysis.
E)All of the above

Question 36

Which of the following is true about data mining applications?

A)They use sophisticated mathematical techniques.
B)They use sophisticated statistical techniques.
C)Their report delivery is more difficult than report delivery for reporting systems.
D)Both A and B
E)All of the above

Question 37

When creating an OLAP report based on Access 2013 data,it is often a good idea to create a view equivalent query to organize the data needed for the OLAP report.

Question 38

Which of the following is a reason that operational data are difficult to read?

A)Dirty data
B)Missing values
C)Non-integrated data
D)Both A and B
E)All of the above

Question 39

Column family databases are indistinguishable from relational database tables.

Question 40

Excel 2013 allows us to connect directly to an Access 2013 database when building a PivotTable.

Question 41

In the MapReduce process,the first step is the ________ step.

A)column
B)super column
C)column family
D)map
E)reduce

Question 42

To arrange the PivotTable columns and rows in Excel 2013,we use the:

A)PivotTable Control.
B)PivotTable dialog box.
C)PivotTable Field List.
D)PivotTable Wizard.
E)PivotTable command tab.

Question 43

Data warehouses use a(n):

A)operational database.
B)dimensional database.
C)structured storage.
D)Either A or B
E)All of the above

Question 44

To use Access 2013 data in an Excel 2013 PivotTable,we use the:

A)"To Excel" command on the Access Data command tab.
B)"To Excel" command on the Excel Data command tab.
C)"From Access" command on the Access Data command tab.
D)"From Access" command on the Excel Data command tab.
E)"Get Data" command on the Excel Data command tab.

Question 45

The term drill down means the user wants to:

A)summarize data.
B)get older data.
C)sort data.
D)get more details.
E)aggregate data.

Question 46

A data warehouse database differs from an operational database because:

A)data warehouse data are not stored in tables.
B)data warehouse databases do not have metadata.
C)data warehouse data are often stored in a dimensional database.
D)Both B and C
E)All of the above

Question 47

Slowly changing dimensions are handled by a(n):

A)operational database.
B)dimensional database.
C)structured storage.
D)Either A or B
E)All of the above

Question 48

Snowflake schemas have normalized:

A)fact tables.
B)dimension tables.
C)map tables.
D)reduce tables.
E)None of the above

Question 49

Apache Cassandra is an example of a(n)________ non-relational DBMS.

A)Key-Value
B)Document
C)Column Family
D)Graph
E)Object-Oriented

Question 50

To use the Access 2013 database in an Excel 2013 PivotTable,it is generally useful to:

A)create a view-equivalent query in Access to organize the data.
B)store the needed data in an Excel worksheet.
C)store the needed data in a Word document.
D)store the needed data in a PowerPoint slide show.
E)store the needed data in a Visio diagram.

Question 51

OLAP stands for:

A)Online Analytical Processing.
B)Offline Analytical Processing.
C)Online Analysis Process.
D)Offline Analysis Process.
E)Old,Lazy And Particular.

Question 52

When distributed databases break the database into sections and store the sections on different servers,this is known as:

A)replication.
B)partitioning.
C)disbursing.
D)distributed two-phase locking.
E)None of the above

Question 53

Star schemas have a ________ at the center of the star.

A)fact table
B)dimension table
C)map table
D)reduce table
E)None of the above

Question 54

When distributed databases create copies of the database on different servers,this is known as:

A)replication.
B)partitioning.
C)disbursing.
D)distributed two-phase locking.
E)None of the above

Question 55

Hadoop is a(n):

A)RDMBS.
B)OODBMS.
C)distributed file system (DFS).
D)print system.
E)Web server.

Question 56

Non-relational DBMSs associated with the NoSQL movement include:

A)Key-Value.
B)Document.
C)Column Family.
D)Graph.
E)All of the above

Question 57

To create an OLAP report for an Access 2013 database,we can build a PivotTable in:

A)Microsoft Access 2013.
B)Microsoft Word 2013.
C)Microsoft Visio 2013.
D)Microsoft Excel 2013.
E)Microsoft PowerPoint 2013.

Question 58

Dimensional databases are used to track historical data and therefore must have a:

A)time dimension.
B)customer dimension.
C)sales dimension.
D)Either A or B
E)Both A and B

Question 59

A data mart differs from a data warehouse in that:

A)it has a smaller database.
B)it deals with a particular component or functional area of the business.
C)data mart users do not have the data management expertise of data warehouse employees.
D)Both A and B
E)All of the above

Question 60

To format a PivotTable in Excel 2013,we use the:

A)Design command tab in the PivotTable Tools contextual command tab.
B)Format command tab in the PivotTable Tools contextual command tab.
C)Design command tab in the Report Tools contextual command tab.
D)Format command tab in the Report Tools contextual command tab.
E)Report Tools command tab.

Question 61

Problematic data are called ________.

Question 62

A(n)________ is a collection of data that addresses a particular component or functional area of a business.

Question 63

A variant of the star schema is the ________.

Question 64

Data warehouse data is often stored in a(n)________.

Question 65

Data warehouses are populated with data prepared by ________ programs.

Question 66

A(n)________ is an information system that helps users analyze and use data.

Question 67

In the snowflake schema,the ________ tables are normalized.

Question 68

________ provides the ability to sum,count,average and perform other simple arithmetic operations on groups of data.

Question 69

The term for the enormous datasets generated by Web 2.0 applications is ________.

Question 70

Business Intelligence (BI)systems fall into two broad categories: ________ and ________.

Question 71

To deal with historical data values,dimensional databases use a(n)________.

Question 72

Business Intelligence (BI)________ are used to filter data,sort data,group data and make simple calculations based on the data.

Question 73

Business Intelligence (BI)________ uses sophisticated statistical and mathematical techniques to perform what-if analyses,to make predictions,and to facilitate decision making.

Question 74

Business Intelligence (BI)systems obtain data in ________ different ways.

Question 75

To deal with data values that change over time,dimensional databases use a(n)________.

Question 76

Distributed databases can be distributed by partitioning and ________.

Question 77

A dimensional database uses a(n)________.

Question 78

Objects have ________,which are computer programs that perform some task.

Question 79

The term ________ refers to the capability of seeing the data in smaller and smaller units.

Question 80

OLAP reports can be created using the Excel 2013 ________ tool.