What is true about the class diagram is that it represents the relationship between classes. Explanation: In the case of a class diagram, different classes are represented based on graphical data. As a result, the effect of one class on the other is very easy to understand.
In software development, a Unified Modeling Language (UML) class diagram is a type of static structure diagram that describes the structure of a system by the classes of the system, their attributes, operations (or methods), and the relationships between objects.
An object model diagram shows the interaction between objects at a given point in time during runtime. A class diagram shows what the objects in your system consist of (members) and what they can do (methods), mostly static.
A class diagram is a diagram used in software design and modeling to describe classes and their relationships. Class diagrams allow us to model software at a high level of abstraction without having to look at the source code. Classes in a class diagram correspond to classes in the source code.
Class diagrams are the blueprints of your system or subsystem. You can use class diagrams to model the objects that make up the system, to show the relationships between the objects, and to describe what those objects do and what services they provide. Class diagrams are useful in many phases of system design.
Relationships in class diagrams show the interaction between classes and classifiers. Such relationships indicate the classifiers that are related, those that are generalizations and realizations, and those that have dependencies on other classes and classifiers.
D. Explanation: Interaction diagram is used to describe some kind of interaction between the different elements in the model. this interaction is therefore part of the dynamic behavior of the system.
In domain modeling class diagrams, an attribute represents a data definition for an instance of a classifier. An attribute describes a range of values for that data definition. A classifier can have any number of attributes or none at all. Attributes describe the structure and value of an instance of a class.
A sequence diagram is a type of interaction diagram because it describes how – and in what order – a group of objects work together. These diagrams are used by software developers and business people to understand the requirements for a new system or to document an existing process.
Use-case diagrams can be described by mentioning who performs which function and what kind of association between functions (use-cases) there is, and class diagrams can be described by mentioning the classes of the system, their attributes, functions and the relationships are shown between objects.
c) Events and Actions: This is the correct option as there is no way to display these aspects in the class diagram.
Inheritance. A very important concept in object-oriented design, inheritance refers to the ability of a class (child class) to inherit the identical functionality of another class (superclass) and then add new functionality of its own.
The correct answers: It specifies the class name and member names. It specifies all subclasses that a class can have. It specifies members unique to a subclass.
The advantages of the class diagram
Class diagrams give you orientation. They provide a detailed insight into the structure of your systems. At the same time, they provide a quick overview of the synergies between the various system elements and their properties and relationships.
Main parts of a class diagram
The class diagram consists of three sections: Top section: The top section includes the name of the class. A class is a representation of similar objects that share the same relationships, attributes, operations, and semantics.