Which of the following best describes the primary purpose of a system model?

• To write code for the system.

• To document the user interface design.

• To provide a simplified representation of a system's structure and behavior.

• To manage project timelines.

In a UML use case diagram, what does an 'actor' represent?

• A specific function within the system.

• An external entity that interacts with the system.

• A data storage component.

• A control flow mechanism.

When comparing a sequence diagram to a class diagram, which statement is most accurate?

• Both diagrams show the static structure of the system.

• A sequence diagram shows dynamic interactions, while a class diagram shows static relationships.

• Both diagrams are used to define the user interface.

• A class diagram shows the flow of data, and a sequence diagram shows the storage of data.

If a system model shows a bottleneck in a specific process, what is the most likely consequence?

• Increased system efficiency.

• Reduced system complexity.

• Decreased system performance.

• Improved data security.

You are designing a UML class diagram for an online bookstore. Which of the following classes would most likely have an 'association' relationship with the 'Customer' class?

• 'PaymentGateway'

• 'ShoppingCart'

• 'DatabaseConnection'

• 'UserInterface'

You need to illustrate the steps involved in a customer placing an order on an e-commerce website. Which UML diagram would be most suitable?

• Class diagram.

• Use case diagram.

• Sequence diagram.

• Deployment diagram.

What is the purpose of multiplicity in a class diagram?

• To define the methods of a class.

• To specify the attributes of a class.

• To indicate the number of instances of one class that can be associated with another class.

• To show the inheritance relationships between classes.

If a use case diagram shows an actor interacting with multiple use cases, what can you infer about the actor's role?

• The actor has limited access to the system.

• The actor plays a central role in the system's functionality.

• The actor is a passive component of the system.

• The actor only interacts with external systems.

When creating a state machine diagram for a 'Document' object, which states would be most relevant?

• 'Created,' 'Modified,' 'Saved,' 'Deleted.'

• 'Connected,' 'Disconnected,' 'Transmitting,' 'Receiving.'

• 'Active,' 'Inactive,' 'Running,' 'Stopped.'

• 'Login,' 'Logout,' 'Authenticated,' 'Unauthorized.'

You are tasked with showing the physical architecture of a web application, including servers, databases, and network connections. Which UML diagram would be the best choice?

• Class diagram.

• Sequence diagram.

• Use case diagram.

• Deployment diagram.