Question 1

In the UML,public visibility is indicated by placing a ________ before an operation or an attribute,whereas a ________ indicates private visibility.&#10;A)letter p,letter n.&#10;B)letter n,letter p.&#10;C)plus sign (+),minus sign (-).&#10;D)minus sign (-),plus sign (+).

Accepted Answer

In UML, the plus sign (+) is used to indicate public visibility, whereas the minus sign (-) is used to indicate private visibility. Therefore, choice C is the correct answer.

Question 2

The UML specifies a relationship called a to model inheritance.&#10;A)inheritization.&#10;B)specialization.&#10;C)generalization.&#10;D)All of the above.

Accepted Answer

The correct UML relationship term for modeling inheritance is generalization. This relationship indicates that one class is a more general concept than the other, and the more specific class inherits the attributes and behaviors of the more general one. Options A and B are not valid terms in the UML.

Question 3

Associations in a class diagram that do not have navigability arrows at both ends indicate ________.&#10;A)no navigability.&#10;B)one-way clockwise navigability.&#10;C)one-way counterclockwise navigability.&#10;D)bidirectional navigability.

Accepted Answer

Associations without navigability arrows at both ends in a class diagram indicate bidirectional navigability, meaning both classes can access each other.

Question 4

In UML diagrams,abstract methods are .&#10;A)displayed in italics.&#10;B)displayed in bold.&#10;C)not shown,as they have yet to be implemented.&#10;D)displayed,but without the parentheses following the method name.

Accepted Answer

Abstract methods are displayed in italics in UML diagrams to differentiate them from concrete methods.

Deck 13: Atm Case Study,part 2: Implementing an Object-Oriented Design