Question

“A complete and consistent class diagram is all that is required to implement and to understand an application”. Discuss the correctness or otherwise of this statement. In your answer, among other things, consider how class diagrams evolve and who has a stake in the understanding and implementation of an application.

Answer 1

The statement "A complete and consistent class diagram is all that is required to implement and to understand an application" is partially agree with it correctness. Because by only class diagram we can't understand the entire application. All uml diagrams like usecase diagram, sequence diagram, activity diagram etc. are required to understand how the application works and users activities in it. Class diagram shows the structure of an application only.

• A complete and consistent class diagram helps in implementing and understanding the application.
• The purpose of creating the Class diagram is visualize and design the structure of an application.
• This class diagram shows the static view of application.
• Application contain different modules and in modules are created to use by different users.
• So the class diagram classifies the modules into form of classes and defines its attributes, methods, variables used in it.
• It also defines relationships between the classes.
• For example,online shopping application consider two modules are customers, seller . Class diagram defines attributes, methods for each module which is considered as class seperately. It shows the relationship between seller and customer.
• Class diagram evolve to define or design code modules, and it's objects.
• It is a blueprint of an application.
• The application developer has a stake in understanding and implementing the application by creating class diagrams.
• The developer should consider class diagram in how to develop an application.

Therefore, the given statement is partially correct but not complete because only by class diagram developer can't understand the application.