12 Questions
What is the primary purpose of a sequence diagram?
To model the interactions between actors and objects in a system
Which of the following is NOT a key component of a class in object-oriented programming?
Inheritance
In a class diagram, what do associations represent?
The links between classes that define how they interact
What is the purpose of multiplicity (cardinality) in a class diagram?
To define the number of participating objects between two classes
In the example provided, what type of relationship is described between corporate customers and personal customers?
Inheritance
What is the difference between a composite and an aggregation relationship in a class diagram?
Composite relationships indicate that the part cannot exist without the whole, while aggregation relationships indicate the part can exist independently
In the CompanyXYZ example, which of the following statements is true?
The class diagram should have two classes: Customer and Order.
In the University System example, which of the following statements is incorrect?
A student can be enrolled in multiple courses in the same semester.
Which of the following diagrams is suitable for representing the flow of control in a program?
Flowchart diagram
What is the purpose of acceptance testing?
To validate that the software meets the requirements and is acceptable for delivery.
Which of the following testing techniques is used to evaluate the software's behavior under unfavorable conditions?
Stress testing
What is the purpose of sequence diagrams in software design?
To model the interactions between objects over time.
Study Notes
Sequence Model/Diagram
- A sequence diagram is used to model the interactions between actors and objects in a system.
- It provides a clear view of the steps in a use case, showing the sequence of interactions.
- Examples of sequence diagrams include:
- Login sequence diagram
- ATM machine sequence diagram
- Sequence diagram for Dinner Now System
Class Diagram
- A class diagram is used to show the classes in a system and their associations.
- A class is defined as having:
- Attributes (member variables)
- Operations (member functions)
- Relationships with other classes
- Associations link classes together and are usually named.
- Types of associations include:
- Inheritance (e.g., CompanyXYZ has two types of customers: corporate and personal)
- Composite (e.g., something is a part of a whole but cannot survive on its own)
Class Diagram Components
- Multiplicity (cardinality) defines the number of participating objects between two classes.
- Relationships between classes include:
- Inheritance (e.g., Bank Account scenario)
- Composition (e.g., CompanyXYZ has two types of customers: corporate and personal)
Class Diagram Example
- Example: CompanyXYZ has two types of customers: corporate customers and personal customers.
- All customers can place an order, and every order is placed by a customer.
- Draw the class diagram for this scenario.
Class Diagram Example: University System
- A university consists of schools, each containing departments.
- Each department offers courses in a semester, which are taught by instructors.
- Students are enrolled in courses, which are taught in a semester.
- Build the class diagram to represent the university system.
Group Assignment
- Submit the following design models for the product (software application):
- Use case diagrams (at least 2)
- Flowchart diagram
- Sequence diagrams (at least 2)
- Class diagram
- Provide a brief description for each diagram.
Reading Assignment
- System Testing includes:
- Black box testing
- White box testing
- Unit testing
- Integration testing
- System testing
- Acceptance testing
- Stress testing
- Regression testing
Final Project
- Present the final project on March 4, 2024.
Test your knowledge on sequence diagrams used to model interactions between actors and objects in a system. Understand the steps in a use case and the sequence of interactions. Topics include login, ATM machine operations, and system interactions.
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