Free Preparation Discussions
MENU
OMG-OCUP2-FOUND100 Exam - Topic 6 Question 44 Discussion
Topic #: 6
Choose the correct answer:
Consider the following diagram:
Which change could the modeler make to fix the UML error in this model?
In the UML diagram given, we see two classes, ClassA and ClassB, with ClassB inheriting from ClassA. ClassA has two attributes, position of type Integer and description of type String. ClassB introduces an additional attribute, version of type Real.
Looking at the instance specifications (the right part of the diagram), we have three instances: a1 of type ClassA, b1 of type ClassB, and b2 also of type ClassB.
In UML, an instance specification must comply with the structure of its classifier, which means an instance of ClassA must show slots for both position and description, whereas an instance of ClassB must show slots for position, description, and version.
In the provided diagram, instance a1 of ClassA only shows a slot for position. This is an error because it does not show a slot for description, which is a defined attribute of ClassA. To correct this error, we would need to add a description slot to a1.
This means that the correct answer is:
B . Add a description slot to a1.
The other options do not correct the error in the model:
A) Specifying unique values for position does not address the missing description slot in a1. C) Changing the type of ClassB.version from Real to Integer is not required by any UML constraint in the context given. D) Changing the type of ClassA.position from Integer to Real does not address the missing description slot in a1 and is unrelated to the inheritance structure.
Tracey
4 days agoTimmy
9 days agoColette
14 days agoTimmy
20 days agoMelodie
25 days agoLashon
30 days agoBethanie
1 month agoKathryn
1 month agoCorrina
2 months agoZoila
2 months agoCorrina
2 months agoWhitney
2 months agoJunita
2 months agoMiss
2 months agoBettina
4 months agoArdella
4 months agoSamuel
5 months agoMargret
5 months agoLorrie
5 months agoRana
5 months ago