Question 1

Which of the following would indicate a minimum cardinality of 1 and a maximum cardinality of many in UML notation?
A)1:N
B)1 ..N
C)1 / *
D)1 ..*
E)1:*

Accepted Answer

The notation "1 ..*" indicates a minimum cardinality of 1 and a maximum cardinality of many. The other options represent various ways of representing a one-to-many relationship, but they do not specify a minimum cardinality of 1.

Question 2

UML is intended for modeling and designing object-oriented programs and applications.

Accepted Answer

UML stands for Unified Modeling Language and is a standardized visual language used to describe and design object-oriented systems. It is widely used in software engineering to model software systems and is applicable throughout the software development lifecycle.

Question 3

In UML notation,the relationship line in a relationship with a non-ID-dependent weak entity is labeled as <nonidentifying>.

Accepted Answer

This is true. The relationship line in a relationship with a non-ID-dependent weak entity is labeled as <nonidentifying> in UML notation.

Question 4

In UML,cardinalities are represented by an x ..y format.

Accepted Answer

This is correct. Cardinalities in UML are represented by an x ..y format.

Question 5

Attributes preceded by a + are public.

Accepted Answer

In most programming languages, attributes preceded by a + are public. This means they can be accessed and modified from outside the class.

Question 6

UML-style E-R diagrams introduce object-oriented notation that is of limited practical value in traditional,relational database design.

Accepted Answer

UML-style E-R diagrams use object-oriented notation, which may not be suitable for traditional, relational database design, as objects do not translate directly into tables and relations.

Question 7

In UML-style E-R diagrams,the second segment of an entity class contains ________.
A)the name of the entity
B)the cardinalities of the entity
C)constraints and methods
D)relationships
E)entity attributes

Accepted Answer

The second segment of an entity class in UML-style E-R diagrams contains entity attributes. These attributes are the properties or characteristics of the entity that need to be stored in a database. Examples of attributes include the name, age, address, email, and phone number of a person entity.

Question 8

Which of the following is true about UML?
A)UML is a methodology for developing OOP systems.
B)UML is a set of tools to support the development OOP systems.
C)UML is primarily focused on database development.
D)A and B
E)A,B,and C

Accepted Answer

UML is both a methodology for developing OOP systems and a set of tools to support the development of OOP systems.

Question 9

The classes of all entities to be stored in the database are labeled <>.

Accepted Answer

Entities that need to be stored in a database are labeled as persistent. This is because they are meant to be stored and retrieved over long periods of time, rather than being temporary in nature.

Question 10

Persistent means that data should continue to exist in the database even if the object that processes it is destroyed.

Accepted Answer

Persistent data is designed to outlast the object or program that created it, and should continue to exist in the database even after the object is destroyed.

Question 11

UML-style E-R diagrams allow for three different levels of visibility of attributes.

Accepted Answer

UML-style E-R diagrams allow for three different levels of visibility of attributes: public, private, and protected.

Question 12

Maximum cardinalities are represented in UML-style E-R diagrams with the same notation (1:1,1:N,N:M)as in traditional E-R diagrams.

Accepted Answer

The answer of Maximum cardinalities are represented in UML-style E-R...

Question 13

Which of the following is a true statement about the current version of UML?
A)UML places a filled-in diamond on the parent of a weak entity.
B)UML does not provide a means to document exclusivity among subtypes.
C)UML uses the label <identifying> to document an ID-dependent relationship.
D)UML shows the cardinality on the parent entity of a weak entity as simply "1."
E)All of the above.

Accepted Answer

The answer of Which of the following is a true...

Question 14

UML-style E-R diagrams allow for the existence of class attributes which are attributes that pertain to the collection of all entities within that class,not to the individual entity instances themselves.

Accepted Answer

This statement is true. Class attributes are also known as static attributes and belong to the class as a whole, rather than individual instances of that class. UML-style E-R diagrams support the representation of these class attributes.

Question 15

Attributes preceded by a # are private.

Accepted Answer

Attributes preceded by a # are not only private, but also called "name mangling" to prevent accidental access from outside the class. They can only be accessed through class methods.

Question 16

Attributes preceded by a + are protected.

Accepted Answer

Attributes preceded by a + are considered public, not protected. In UML (Unified Modeling Language), a + indicates public visibility, while # indicates protected visibility.

Question 17

In UML notation,the relationship line in a relationship with an ID-dependent weak entity is labeled as <id-dependent>.

Accepted Answer

In UML notation, the relationship line in a relationship with an ID-dependent weak entity is typically not labeled with "". Instead, the relationship is often indicated by a dashed line or a specific notation that denotes the entity's weak status, without explicitly using the text "".

Question 18

In UML-style E-R diagrams,a weak entity is shown by placing a filled-in diamond on the parent of the weak entity.

Accepted Answer

This is true. In UML-style E-R diagrams, a weak entity is depicted with a filled-in diamond on the side of the relationship that carries the minimum cardinality for the optional relationship between the weak entity and its identifying entity.

Question 19

In UML-style E-R diagrams,the third segment of an entity class contains ________.
A)the name of the entity
B)the cardinalities of the entity
C)constraints and methods
D)relationships
E)entity attributes

Accepted Answer

The answer of In UML-style E-R diagrams,the third segment of...

Question 20

One weakness of UML-style E-R diagrams is that there is no means of distinguishing between a weak entity that is ID-dependent and a weak entity that is not ID-dependent.

Accepted Answer

UML-style E-R diagrams allow for the distinction between weak entities through the use of different notations, such as dashed lines for ID-dependent relationships, indicating the dependency of a weak entity on its parent entity for identification.

Quiz 16: E-R Diagrams and the UML Standard

Which of the following would indicate a minimum cardinality of 1 and a maximum cardinality of many in UML notation?