Question

question 1

(a) i. Explain the difference in the nature and purpose of conceptual class diagram and design class diagram?

ii. Design classes are often classified as information (model), control (controller) and interface (or boundary or view) classes. Briefly describe the general role that each of these types of classes play in the generation of behaviour

iii. Briefly explain the nature and purpose of UML in OOAD

Answer 1

i. Explain the difference in the nature and purpose of a conceptual class diagram and design class diagram?
Conceptual Class Diagram: Conceptual class diagrams are the diagrams that are designed to understand the business logic involved to create the software. It includes various UML diagrams that include different classes and the relationship is defined within the classes. So association, Inheritance is defined in these diagrams such that we can understand the basic business requirement,

Design Class Diagram : These diagram include detailed data of the particular classes like their methods and all the attributes with their data type.

for example: Lets say we have a class named as Student ; so in case of conceptual design of this class; we will have UML diagram defined as name, age, address as the attribute and name of the method let's say getName() whereas in case of design class diagram, this will have the attributes' names along with their data type.

Conceptual Designed Name Name: Strung Age Age: int Address: Address: int getName get Age int getAgel) Istring getName() Student class Student Class

ii. Design classes are often classified as information (model), control (controller) and interface (or boundary or view) classes. Briefly describe the general role that each of these types of classes plays in the generation of behavior.
Ans: Model, View , and controller divide the application into three parts where each part has dedicated work given.
Model: This layer consist of all the data of the application. All the variables are defined here which are going to be used in the application.
View: This layer is responsible for what the end-user will see. So, this layer will pick the data and display it to the end-user.
Controller: This is the intermediate layer where the logic for the application is written .So, here the data is manipulated accordingly to get the desired result. This layer consists of methods that contain the logic and the result is sen to view layer.

iii. Briefly explain the nature and purpose of UML in OOAD.
Unified Modelling Language is a graphical language that is used in the software industry for designing artifacts that are related to the software. It helps us to understand via diagrams how the software is divided and hence, easy to understand . It helps to understand the complete system in a single view. It gives the clear picture of the software so that developers can easily work on the coding,

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