Download Chapter 4 Exercise

MBA 5670 Management of Information technologies
Database and Data Warehouse
Review Questions
Q.1
In a table the primary key is
A) the first record in the table
B) a field, or group of fields, that uniquely identifies an individual record
C) a group of fields with the same content
D) None of the above
Q.2
Usually, which of the following is not included in a database management system?
A) Database
B) Database engine
C) Database manipulation language
D) Database operating system
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Which of the following can be considered desktop database software?
A) Microsoft Excel
B) Oracle
C) Microsoft Access
D) None of the above
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In a DBMS, the logical view is:
A) The way that data is actually stored on a secondary storage device
B) The way that data is actually displayed to the user
C) The way that data is indexed on a secondary storage device
D) The way that data is published
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Q.3
Q.4
Q.5
Which of the following types of DBMS is more convenient for multimedia
applications?
A) Flat File
B) Relational
C) Object-Oriented
D) None of the above
Q.56
Which of the following could define a composite key:
A) the first record in the table
B) a group of fields that uniquely identify an individual record
C) a group of fields with the same content
D) None of the above
Q.7
In a table a primary key is … (Circle all correct answers)
A) the first record in table
B) a group of field with the same content
C) a field that uniquely identifies an individual record
D) a group of fields that uniquely identify an individual record
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Q.8
Q.9
Q.10
Q.11
Q.12
Q.13
Q.14
Q.15
Which of the following DBMS seen in class would not be classified as a desktop
DBMS?
A) Microsoft's Access
B) Corel's Paradox
C) FileMaker Pro
D) Oracle 9i Enterprise
A primary key made up of multiple fields is called:
A) Multi key
B) Multiprimary key
C) Composite key
D) None of the above
In this database model, multiple tables can be linked to each other, by using a
common field in each table:
A) Linking model
B) Network model
C) Relational model
D) Hierarchical model
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Data mining tools include …
A) query tools
B) statistical analysis tools
C) intelligent agents
D) All of the above
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A record is a set of ______________ that describe an entity in a table:
A) columns
B) rows
C) fields
D) None of the above
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Which of the following is true about warehouse?
A) It, typically, contains both internal and external data
B) It, typically, contains both current and historical data
C) Its content is used to support business analysis activities as well as decisionmaking tasks.
D) All of the above
In a table, the field values represent
A) the name assigned to the field
B) the actual data for the field`
C) a group of fields with the same content
D) None of the above
Which of the following relationships cannot be handled by the relational database
model?
A) One-to-One (1:1)
B) One-to-Many (1:M)
C) Many-to-Many (M:M)
D) None of the above
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Q.16
In data warehouse design, Extraction, Transformation, and Loading refers to …
A) the process of extracting data from a data warehouse, transforming it,
and adding it to internal and external databases.
B) the process of extracting data from data marts, transforming it,
and adding it to a data warehouse.
C) the process of extracting data from internal and external databases,
transforming it, and adding it to the data warehouse.
D) None of the above
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Q.17
In a data mart, information appears in two-dimensional tables.
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Q.18
In the Flat File database model, you can create relationship between two tables by
using a foreign key.
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Q.19
Traditional File systems are not easier to maintain than database systems
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Q.20
In a data warehouse, information appears in multidimensional containers.
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Q.21
Tables in a Flat file database model are not linked
T
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Q.22
In the relational database model, you need to allow for a little bit of redundancy in
order to create relationships between tables.
T
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Q.23
Flat file model and Relational model are among the most common database
models used today.
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Q.24
Flat File database model is usually used in PDAs
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Q.25
In designing and developing a data warehouse, Information Cleansing occurs
during Extraction, Transformation, and Loading.
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Q.26
In designing and developing a data warehouse, Information Cleansing occurs once
the data in the data warehouse.
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Q.27
In the sixties and seventies, most business applications use what is called Traditional
File system for handling and the applications’ data. Explain what the Traditional File
system is and what are the main issues associated with that system.
Q.28
Since the late seventies, businesses turned to database management systems – DBMS for handling and managing data. Discuss the main functions of today’s DBMS.
Q.29
Information Cleansing or Scrubbing is used to get and maintain high quality data in data
warehouse. Explain what is Information Cleansing or Scrubbing and when is it done in
the process of designing a data warehouse.
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