UML Class Diagrams

What is the primary purpose of a class in UML class diagrams?

• To depict relationships between different objects

• To represent a specific instance of an object

• To describe a category of objects with shared characteristics

• To illustrate the flow of data in a system

What are attributes in the context of UML class diagrams?

• Significant pieces of data that describe instances of a class

• Methods that define the behavior of a class

• Visual representations of class relationships

• The names of the classes in the diagram

Which section of a UML class diagram typically contains the name of the class?

• Bottom section

• Middle section

• Top section

• Side section

What does a minus sign indicate in terms of visibility for attributes or methods?

• Protected access

• Public access

• Private access

• Default access

Which visibility type allows access to attributes or methods only within the same class or its subclasses?

• Protected

• Private

• Public

• Default

What is the purpose of parentheses in method definitions?

• To indicate visibility

• To declare variables

• To signify the function to be programmed later

• To denote the end of a method

What is the primary purpose of using inheritance in object-oriented programming as described in the zoo example?

• To avoid duplicating attributes across subclasses

• To define new classes without any relationship

• To create multiple instances of the same class

• To implement complex algorithms

In the context of the zoo example, what does the term 'abstract class' refer to?

• A class that has no attributes

• A class that contains only static methods

• A class that cannot be instantiated directly

• A class that is used for data storage

Which of the following attributes is specific to the otter class in the zoo example?

• Name

• ID

• Age

• Whisker length

What is the term used to describe a relationship where a part can exist independently of the whole?

• Inheritance

• Composition

• Aggregation

• Association