Test: DFo Section 1 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 1
(Answer all questions in this section)
1. In a hierarchical database model the data is stored as records that are
connected to one another through ________.
Mark for Review
(1) Points
databases
primary keys
fields
links (*)
Incorrect. Refer to Section 1 Lesson 3.
2. In the relational database model, each table name must be unique. The
column names in the table must be unique too. You can have two
different tables that have column names that are the same.
Mark for Review
(1) Points
True (*)
False
Incorrect. Refer to Section 1 Lesson 3.
3. In a _______ database model the data is organized into a tree-like
structure and to retrieve data the whole tree needs to be traversed
starting from the root node.
Mark for Review
(1) Points
Relational
Hierarchical (*)
Network
Object Oriented
Correct
4. Which of the following is not a stage in the Database Development
Process?
Mark for Review
(1) Points
Strategy and Analysis
Reporting (*)
Design
Build
Correct
5. A database interacts with the data and provides the following facilities:
Mark for Review
(1) Points
Retrieving data
Inserting data
Deleting data
All of the above. (*)
Correct
Test: DFo Section 1 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 1
(Answer all questions in this section)
6. DBMS stands for :
Mark for Review
(1) Points
Database Memory System
Database Management Software
Database Manipulation System
Database Management System (*)
Correct
7. The transformations that have occurred in the computing world
progressing in this order:
Mark for Review
(1) Points
Grid Computing, Desktop Computing, Mainfram Computing, Client/Server
Computing
Desktop computing, Grid computing, Client/Server computing, Mainframe
computing.
Mainframe Computing, Desktop Computing, Grid Computing,
Client/Server Computing.
Mainframe computing, Desktop computing, Client/Server Computing, Grid
computing. (*)
Correct
8. Select the business or industry that would not have a need for a
database.
Mark for Review
(1) Points
Banking
Retail
Scientific Research
All these businesses could benefit from using a database. (*)
Correct
9. If information requirements are clearly communicated during
conceptual modeling the following will result:
Mark for Review
(1) Points
A well designed conceptual model (*)
Some business rules may not be taken into account
A conceptual model that does not fully reflect the business will be created.
Delays due to reworking model caused by incorrect assumptions
Incorrect. Refer to Section 1 Lesson 4.
10. Business rules are important because_________.
Mark for Review
(1) Points
They allow the developer to understand the relationship and constraints of
the participating entities (*)
They are complex and difficult to understand.
They can become outdated quickly.
They can all be incorporated into the database design structure.
Correct
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Test: DFo Section 1 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 1
(Answer all questions in this section)
11. Once you have learned how to write programs and build systems, you
no longer need any input or involvement from any users as you are
perfectly capable of delivering the systems that businesses need and
want.
Mark for Review
(1) Points
True. Users delay the delivery of a system by changing their minds and
adding new requirements.
True. The only requirement for creating a perfect system is a perfect
programmer.
True. Users never know what they want anyway, so building systems is
best left to the professionals.
False. Business requirements can and will change. For instance new legal
requirements may arise. (*)
Correct
12. Business ______ are used to understand business processes, and the
nature, role, and scope of the data.
Mark for Review
(1) Points
Goals
Rules (*)
Processes
Mission Statements
Incorrect. Refer to Section 1 Lesson 4.
13. All Business Rules can be modeled.
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 1 Lesson 4.
14. The strategies for learning used in this course include:
Mark for Review
(1) Points
Instructor led training
Industry recognized certification
Project driven curriculum
All of the above (*)
Correct
15. The main subject areas taught by the Oracle Academy are:
Mark for Review
(1) Points
Data Modeling, SQL, and PL/SQL (*)
Database performance tuning
Systems programming and computer architecture
Computer Repairs
Correct
Previous Page 3 of 3
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
1. In the relational model, data is organized in a basic storage structure
called a ____________.
Mark for Review
(1) Points
Field
Tuples
Table (*)
Row
Correct
2. A _______ is a collection of records.
Mark for Review
(1) Points
table (*)
row
field
column
Incorrect. Refer to Section 2 Lesson 1.
3. In an ERD diagram how is an optional relationship represented ?
Mark for Review
(1) Points
With a solid line
With a dotted line (*)
With an arrow
With a crows foot
Incorrect. Refer to Section 2 Lesson 6.
4. When mapping a relationship for an ERD diagram both sides of the
relationship have to be mapped.
Mark for Review
(1) Points
True (*)
False
Correct
5. Which of the following statements about entity relationship diagrams
(ERD) is true?
Mark for Review
(1) Points
Used to communicate the logical structure of the database to users. (*)
Used to communicate the technical specifications of the database to users
Used to communicate the physical structure of the database to users.
Is a hard and fast document that cannot be changed once development of
the database has begun.
Correct
Page 1 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
6. What is the purpose of a Unique Identifier?
Mark for Review
(1) Points
To identify one unique instance of an entity by using one or more
attributes and/or relationships. (*)
To identify a specific row within a table, using one or more columns
and/or foreign keys.
To uniquely determine a table and columns within that table.
Create an entity that is unlike any other entity aside from itself.
Correct
7. All entities must be given a new artificial UID. True or False?
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 2 Lesson 4.
8. Matrix Diagrams are used to verify that all ____________ have been
identified for an ERD.
Mark for Review
(1) Points
entities
relationships (*)
keys
attributes
Correct
9. In an ERD, optionality is depicted using __________.
Mark for Review
(1) Points
single toe or crows foot
solid or dashed lines (*)
names of relationships
soft boxes
Incorrect. Refer to Section 2 Lesson 5.
10. The optionality of a relationship must be either _______ or _______.
Mark for Review
(1) Points
One or (One or More)
Single or Multiple
Bidirectional or a single direction
Mandatory or Optional (*)
Correct
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Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
11. The logical model becomes the blueprint for designing the ________
model
Mark for Review
(1) Points
Physical (*)
Network
Data Integrity
Data Flow
Correct
12. The logical model's entities, attributes, unique identifiers and
relationships map to the physical model's _________________.
Mark for Review
(1) Points
Optionality and Cardinality
Files, records, fields and data values
Tables, columns, primary keys and foreign keys (*)
Correct
13. Entities are usually _____________.
Mark for Review
(1) Points
Nouns (*)
Verbs
Adjectives
Adverbs
Incorrect. Refer to Section 2 Lesson 3.
14. Which of the following entities most likely contains invalid attributes?
Mark for Review
(1) Points
Entity: Pet. Attributes: Name, Birthdate, Owner
Entity: Mother. Attributes: Name, Birthdate, Occupation, Number of
Children
Entity: Car. Attributes: Owner Occupation, Owner Salary, Speed(*)
Entity: Home. Attributes: Number of Bedrooms, Owner, Address, Date
Built
Correct
15. Which symbol is used to show that a particular attribute is
mandatory?
Mark for Review
(1) Points
#
* (*)
&
o
Incorrect. Refer to Section 2 Lesson 3.
Previous Page 3 of 3
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
1. Which of the following statements about attributes are true? (Choose
Two)
Mark for Review
(1) Points
They must be single valued unless they belong to more than one entity.
They describe, qualify, quantify, classify, or specify an entity. (*)
They are the primary container for data.
They are often adjectives.(*)
Incorrect. Refer to Section 2 Lesson 3.
2. When creating entities in a logical model you must follow these rules:
(Choose Two)
Mark for Review
(1) Points
Include Attributes(*)
Name them in Plural
Exclude Attributes
Name them in Singular(*)
Incorrect. Refer to Section 2 Lesson 3.
3. An entity may have which of the following?
Mark for Review
(1) Points
Experiences
Instances (*)
Tables
None of the above
Correct
4. Which of the following statements is true regarding ImplementationFree logical models?
Mark for Review
(1) Points
The model changes depending on operating system that is being used.
The model stays the same regardless of the DBMS or operating system
used. (*)
The model changes depending on the relational database software being
used
The model does not need to implemented on a DBMS.
Incorrect. Refer to Section 2 Lesson 6.
5. When mapping a relationship for an ERD diagram both sides of the
relationship have to be mapped.
Mark for Review
(1) Points
True (*)
False
Correct
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
6. Which of the following is not a goal of ER modeling:
Mark for Review
(1) Points
Locate information in a logical manner
Ensure information appears only once.
It is acceptable to include information that is derivable. (*)
Capture all required information.
Incorrect. Refer to Section 2 Lesson 6.
7. Which of the following would be good as a Unique Identifier for its
Entity? (Choose Three)
Mark for Review
(1) Points
Vehicle Registration Number for Car(*)
ISBN Number for Book(*)
Personal Identification number for Person(*)
Date of birth for Baby
Incorrect. Refer to Section 2 Lesson 4.
8. Primary UIDs are:
Mark for Review
(1) Points
Useful as an alternative means of identifying instances of an entity,
independent of their datatype
Always comprised of numbers
Optional in data modeling.
Mandatory in data modeling (*)
Incorrect. Refer to Section 2 Lesson 4.
9. A _______ is a collection of records.
Mark for Review
(1) Points
column
row
field
table (*)
Correct
10. What does single table refer to? (Choose Two)
Mark for Review
(1) Points
A type of database storage method where all of the data elements are stored on top of each other.
A database where all of the data is stored in one large table. (*)
A fully-relational database system like Microsoft's SQL Server or Oracle's database systems.
Non-relational systems that typically store each table and index in separate files and often do not
support the SQL language.(*)
Incorrect. Refer to Section 2 Lesson 1.
Previous Page 2 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
11. Which of the following are reasons we create conceptual models?
Mark for Review
(1) Points
It facilitates discussion; a picture is worth a thousand words
It forms important ideal system documentation
It takes into account government regulations and laws
It forms a sound basis for physical database design
All of the above (*)
Correct
12. The logical model determines relationship optionality and cardinality
Mark for Review
(1) Points
True (*)
False
Correct
13. The optionality of a relationship must be either _______ or _______.
Mark for Review
(1) Points
Single or Multiple
Mandatory or Optional (*)
One or (One or More)
Bidirectional or a single direction
Correct
14. Which of the following is NOT a relationship type?
Mark for Review
(1) Points
One to One
One to Many
Many to Many
Some to None (*)
Correct
15. A __________ relationship is a relationship between an entity and
itself.
Mark for Review
(1) Points
Recursive (*)
One to one
Mandatory
Hierarchical
Correct
Previous Page 3 of 3
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
1. Which symbol is used to show that a particular attribute is optional?
Mark for Review
(1) Points
o (*)
&
*
#
Correct
2. Attributes have Instances. True or False?
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 2 Lesson 3.
3. Entities are usually _____________.
Mark for Review
(1) Points
Verbs
Adjectives
Adverbs
Nouns (*)
Correct
4. A candidate UID that does not get chosen to become the primary UID
is called a _________ .
Mark for Review
(1) Points
Secondary UID (*)
Primary UID
Composite UID
Unique UID
Incorrect. Refer to Section 2 Lesson 4.
5. What is the purpose of a Unique Identifier?
Mark for Review
(1) Points
Create an entity that is unlike any other entity aside from itself.
To identify one unique instance of an entity by using one or more
attributes and/or relationships. (*)
To identify a specific row within a table, using one or more columns
and/or foreign keys.
To uniquely determine a table and columns within that table.
Correct
Page 1 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
6. Data Integrity ensures ______ in the information.
Mark for Review
(1) Points
duplication
anomalies
no duplication (*)
errors
Incorrect. Refer to Section 2 Lesson 1.
7. Flat file databases avoids data duplication. True or False?
Mark for Review
(1) Points
True
False (*)
Correct
8. A conceptual model includes :
Mark for Review
(1) Points
Only Entities and Relationships (*)
Only Entities, Attributes and Unique Identifiers
Only Entities, Attributes and Relationships
Entities, Attributes, Unique Identifiers and Relationships
Incorrect. Refer to Section 2 Lesson 2.
9. In a relational database system, the next step after creating a
conceptual data model is to convert it to a _________ .
Mark for Review
(1) Points
An entity-relation data model
External data model
Internal data model
Logical data model (*)
Correct
10. Data models are drawn to show users the actual Data that their new
system will contain; only Data listed on the Diagram can be entered into
the Database. True or False?
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 2 Lesson 6.
Previous Page 2 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
11. The __________ model includes entities, attributes, UIDs,
relationships as well as optionality and cardinality of these items.
Mark for Review
(1) Points
Physical
Hierarchical
Conceptual
Logical (*)
Incorrect. Refer to Section 2 Lesson 6.
12. ERDish is a language used to create database structures in SQL
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 2 Lesson 5.
13. The components of a relationship include all of the following except :
Mark for Review
(1) Points
Cardinality
Relational Integrity (*)
Names
Optionality
Incorrect. Refer to Section 2 Lesson 5.
14. The cardinality of a relationship can be _____________. (Choose two)
Mark for Review
(1) Points
one to one
one or more(*)
many to many
one and only one(*)
Incorrect. Refer to Section 2 Lesson 5.
15. One-to-Many relationships have cardinality of one or more in both
directions. True or False?
Mark for Review
(1) Points
True
False (*)
Incorrect. Refer to Section 2 Lesson 5.
Previous Page 3 of 3
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
1. A relational database stores information in tables with rows and
columns.
Mark for Review
(1) Points
True (*)
False
Correct
2. Flat file databases avoids data duplication. True or False?
Mark for Review
(1) Points
True
False (*)
Correct
3. When mapping a relationship for an ERD relationship names must be
included.
Mark for Review
(1) Points
True (*)
False
Correct
4. Which of the following is not a goal of ER modeling:
Mark for Review
(1) Points
Capture all required information.
It is acceptable to include information that is derivable. (*)
Ensure information appears only once.
Locate information in a logical manner
Incorrect. Refer to Section 2 Lesson 6.
5. Using ERDish, which wording represents cardinality? (Choose Two)
Mark for Review
(1) Points
one only
one or more(*)
one and only one(*)
one or multiple
Incorrect. Refer to Section 2 Lesson 6.
Page 1 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
6. A/an _________ is a piece of information that in some way describes
an entity. It is a property of the entity and it quantifies, qualifies,
classifies, or specifies the entity.
Mark for Review
(1) Points
Attribute (*)
ERD
Table
Process
Incorrect. Refer to Section 2 Lesson 3.
7. Which of the attributes is a volatile attribute?
Mark for Review
(1) Points
Age (*)
Race
Eye color
Date of birth
Correct
8. When creating entities in a logical model you must follow these rules:
(Choose Two)
Mark for Review
(1) Points
Include Attributes(*)
Exclude Attributes
Name them in Singular(*)
Name them in Plural
Correct
9. The optionality of a relationship must be either _______ or _______.
Mark for Review
(1) Points
One or (One or More)
Single or Multiple
Bidirectional or a single direction
Mandatory or Optional (*)
Correct
10. In a relationship , _________ are used to helped describe the
meaning of the connection between the entities.
Mark for Review
(1) Points
names (*)
descriptions
arrows
crows feet
Correct
Previous Page 2 of 3 Next
Test: DFo Section 2 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 2
(Answer all questions in this section)
11. The components of a relationship include all of the following except :
Mark for Review
(1) Points
Optionality
Relational Integrity (*)
Names
Cardinality
Correct
12. The physical model shows all table structures. True or False.
Mark for Review
(1) Points
True (*)
False
Correct
13. Many reasons exist for creating a conceptual model. Choose three
appropriate reasons from the options below.
Mark for Review
(1) Points
They capture the data values.
They accurately describe what a physical model will contain. (*)
They capture the implementation details of the physical model.
They capture current and future needs.(*)
They model functional and informational needs. (*)
Incorrect. Refer to Section 2 Lesson 2.
14. All entities must be given a new artificial UID. True or False?
Mark for Review
(1) Points
True
False (*)
Correct
15. The candidate UID that is chosen to identify an entity is called the
Primary UID; other candidate UIDs are called Secondary UIDs.
Mark for Review
(1) Points
No, after UIDs are first sorted, the first one is called the Primary UID, the
second is the Secondary UID, etc.
No, each Entity can only have one UID, the secondary one.
No, it is not possible to have more than one UID for an Entity.
Yes, this is the way UID's are named. (*)
Incorrect. Refer to Section 2 Lesson 4.
Previous Page 3 of 3
Test: DFo Section 3 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 3
(Answer all questions in this section)
1. Until all attributes are single-valued, the database model is said to be:
Mark for Review
(1) Points
Normalized
in 1st Normal Form
in 2nd Normal Form
Not Normalized (*)
Incorrect. Refer to Section 3 Lesson 3.
2. Would it be a good idea to model age as an attribute of STUDENT?
Mark for Review
(1) Points
Yes, it would prevent our having to calculate someone's age every time
we need it.
Sometimes, but not all of the time
Yes
No - it is a volatile attribute (*)
Correct
3. Sources of business rules include all of the following except:
Mark for Review
(1) Points
Procedures
Word of mouth (*)
Operational manuals
Standards
Correct
4. Can all constraints be modeled on an ER diagram?
Mark for Review
(1) Points
No, but you just explain them to the users so they can enforce them
Yes, all constraints must be modeled and shown on the ER diagram
No, and those that cannot be modeled should be listed on a separate
document to be handled programmatically (*)
No, in which case you should let the database administrator handle them
Incorrect. Refer to Section 3 Lesson 3.
5. Business rules are important to data modelers. True or False?
Mark for Review
(1) Points
True (*)
False
Correct
Page 1 of 3 Next
Test: DFo Section 3 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 3
(Answer all questions in this section)
6. All instances of the supertype _____ be an instance of one of the
subtypes.
Mark for Review
(1) Points
cannot
must (*)
may
will sometimes
Correct
7. You can only create relationships to a Supertype, not to a Subtype.
True or False?
Mark for Review
(1) Points
True
False (*)
Correct
8. If a relationship can NOT be moved between instances of the entities it
connects, it is said to be:
Mark for Review
(1) Points
Transferable
Non-Transferable (*)
Mandatory
Optional
Correct
9. Which of the following pairs of entities is most likely to be modeled as a
M:M relationship?
Mark for Review
(1) Points
TEACHER and SUBJECT AREA (*)
CAR and WHEEL
TREE and BRANCH
PERSON and FINGERPRINT
Correct
10. A recursive relationship has cardinality of ___________.
Mark for Review
(1) Points
Many to Many
One to One
Cannot be determined without more information. (*)
One to Many
Incorrect. Refer to Section 3 Lesson 1.
Previous Page 2 of 3 Next
Test: DFo Section 3 Quiz
Review your answers, feedback, and question scores below. An asterisk
(*) indicates a correct answer.
Section 3
(Answer all questions in this section)
11. Which of the following would be a logical constraint when modeling
time for a City entity?
Mark for Review
(1) Points
Daily traffic patterns must be monitored to determine how many law
enforcement officers are needed.
If you are doing a system for any French City, you would need security
clearance.
Cites may change their names and/or country association if the borders of
a country change. (*)
People are born in the city and people die in the city.
Incorrect. Refer to Section 3 Lesson 2.
12. Modeling historical data is optional. True or False?
Mark for Review
(1) Points
True (*)
False
Incorrect. Refer to Section 3 Lesson 2.
13. Attribute names are converted to column names by
_________________.
Mark for Review
(1) Points
Replacing numbers with letters.
Replacing spaces with underscores. (*)
Replacing underscores with dashes.
Replacing periods with commas.
Correct
14. Table names can contain all of the following except:
Mark for Review
(1) Points
Letters
Numbers
Some special characters
Spaces (*)
Correct
15. When mapping entities containing supertypes and subtypes a
_________ table implementation is used when most of the attributes and
relationships are shared at the supertype level.
Mark for Review
(1) Points
many to many
multiple-table
two-table
single-table (*)
Incorrect. Refer to Section 3 Lesson 4.
Previous Page 3 of 3